Kev tshawb fawb nce qib ntawm kev siv thev naus laus zis rov qab rau cov pov tseg phosphate ion roj teeb rov qab thev naus laus zis

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Xyoo 2010, kuv lub teb chaws tau pib txhawb nqa lub zog tshiab. Nyob rau hauv 2014, qhov tshwm sim ntawm tawg nce, 2017 muag ntawm kwv yees li 770,000 tsheb. Bus, tsheb npav, thiab lwm yam.

Raws li lithium hlau phosphate ion roj teeb, lub neej expectancy yog li 8 xyoo. Kev nce ntxiv nyob rau hauv lub zog tshiab tsheb yuav muaj qhov tawg ntawm cov roj teeb lithium dynamic yav tom ntej. Yog tias muaj ntau lub roj teeb tshem tawm tsis muaj kev daws teeb meem zoo, nws yuav ua rau muaj kev puas tsuaj loj rau ib puag ncig thiab lub zog pov tseg, yuav ua li cas daws cov roj teeb pov tseg yog qhov teeb meem loj uas tib neeg saib xyuas.

Raws li kev txheeb cais ntawm kuv lub teb chaws lithium-powered lithium roj teeb kev lag luam, qhov kev thov rau lub ntiaj teb no dynamic lithium roj teeb nyob rau hauv 2016 yog 41.6GW H, qhov twg LFP, NCA, NCM thiab LMO plaub yam tseem ceeb ntawm dynamic lithium-ion roj teeb yog 23.9GW · h, feem.

5.5GW · h, 10.5GW · h thiab 1.

7GW · h, Lifepo4 roj teeb nyob 57.4% ntawm kev ua lag luam, NCA thiab NCM ob qhov loj peb-dimensional system fais fab lithium roj teeb tag nrho cov kev xav tau suav rau 38.5% ntawm tag nrho cov kev thov.

Vim yog lub zog loj ntawm peb-yuan cov khoom siv, 2017 Sanyuan Fais Fab Lithium Battery yog 45%, thiab lithium hlau roj teeb yog 49% ntawm lithium roj teeb. Tam sim no, lub tsheb hluav taws xob ntshiab yog tag nrho cov lithium hlau phosphate ion roj teeb, thiab hlau phosphate dynamic lithium roj teeb yog cov roj teeb tseem ceeb tshaj plaws hauv kev lag luam thaum ntxov. Yog li ntawd, lub sij hawm decommissioning ntawm lithium hlau phosphate ion roj teeb yuav tsum xub tuaj txog.

Kev rov ua dua tshiab ntawm LifePo4 cov roj teeb pov tseg tuaj yeem tsis tsuas yog txo cov kev ntxhov siab ib puag ncig los ntawm cov khib nyiab loj, tab sis yuav ua rau muaj txiaj ntsig zoo rau kev lag luam, uas yuav ua rau muaj kev txhim kho txuas ntxiv ntawm tag nrho kev lag luam. Kab lus no yuav daws lub teb chaws txoj cai tam sim no, tus nqi tseem ceeb ntawm cov khoom pov tseg, LifePo4 roj teeb, thiab lwm yam. Rau lub hauv paus no, ntau yam kev rov ua dua tshiab, rov siv dua, electrolyte, electrolyte, electrolyte, electrolyte thiab tsis zoo electrode cov ntaub ntawv, thiab xa mus rau cov nplai rov qab siv rau LIFEPO4 roj teeb.

1 Txoj Cai Kev Siv Hluav Taws Xob Siv Hluav Taws Xob Nrog kev txhim kho ntawm kuv lub teb chaws kev lag luam roj teeb lithium-ion, kev rov ua dua tshiab thiab daws cov roj teeb uas siv tau yog qhov teeb meem kev noj qab haus huv uas kev lag luam tuaj yeem txhim kho txuas ntxiv. Daim Ntawv Ceeb Toom ntawm "Kev Txuag Hluav Taws Xob thiab Lub Zog Tshiab Kev Lag Luam Kev Lag Luam Kev Lag Luam Kev Lag Luam (2012-2020)" tau hais meej tias kev txhim kho cov roj teeb lithium roj teeb kauj ruam siv thiab kev tswj xyuas rov qab, kev txhim kho cov roj teeb lithium roj teeb rov ua dua tshiab, coj lub zog lithium roj teeb ua lub tuam txhab txhim kho kev rov ua dua cov roj teeb pov tseg. Nrog rau qhov teeb meem loj zuj zus ntawm cov roj teeb lithium rov qab, lub teb chaws thiab cov chaw tau tshaj tawm txoj kev txhim kho cov cai, cov qauv thiab kev saib xyuas ntawm kev lag luam rov ua dua tshiab hauv xyoo tas los no.

Lub teb chaws txoj cai tseem ceeb hauv kev siv roj teeb hauv lub tebchaws tau qhia hauv Table 1. 2 Khib LifePO4 Roj teeb Recycling Cov Khoom Tseem Ceeb Lithium Ion Battery Structure Feem ntau suav nrog cov khoom siv hluav taws xob zoo, qhov tsis zoo electrode, electrolyte, diaphragm, vaj tse, npog, thiab lwm yam, nyob rau hauv cov khoom zoo electrode yog lub hauv paus ntawm lithium ion roj teeb, thiab cov khoom siv electrode zoo suav nrog ntau dua 30% ntawm cov roj teeb. Table 2 yog cov khoom siv ntawm ib pawg ntawm 5A · h mob LifePO4 roj teeb hauv Guangdong Province (1% cov ntsiab lus khoom hauv lub rooj).

Nws tuaj yeem pom los ntawm Table 2, lithium zoo electrode phosphate, qhov tsis zoo graphite, electrolyte, lub diaphragm yog qhov loj tshaj plaws, tooj liab ntawv ci, aluminium ntawv ci, carbon nanotubes, acetylene dub, conductive graphite, PVDF, CMC. Raws li Shanghai coloured net muab (Lub Rau Hli 29, 2018), txhuas: 1.4 lab yuan / tuj, tooj liab: 51,400 yuan / tuj, lithium hlau phosphate: 72,500 yuan / tuj; Raws li kuv lub teb chaws lub zog cia network thiab roj teeb network Raws li cov lus ceeb toom, cov khoom siv graphite tsis zoo electrode yog (6-7) lab / ton, tus nqi ntawm electrolyte yog (5-5.

5) lab / ton. Cov khoom siv ntau, tus nqi siab, yog ib qho tseem ceeb ntawm kev rov ua dua tshiab ntawm cov roj teeb uas siv tam sim no, thiab rov ua dua cov kev daws teeb meem los txiav txim siab txog kev lag luam thiab cov txiaj ntsig ib puag ncig. 3 Khib nyiab LifePO4 Khoom Siv Siv Tshuab 3.

1 Chemical Precipitation Law Recycling Technology Tam sim no, chemical precipitate ntub rov qab yog txoj kev nruj ntawm kev rov ua dua cov roj teeb pov tseg. Cov oxides los yog ntsev ntawm Li, Co, Ni, thiab lwm yam. rov qab los ntawm cov nag lossis daus, thiab tom qab ntawd cov khoom siv tshuaj lom neeg.

Daim ntawv yog nqa tawm, thiab cov tshuaj los nag txoj kev yog ib qho tseem ceeb mus kom ze rau tam sim no industrialized rov qab ntawm lithium cobaltate thiab peb-dimensional pov tseg roj teeb. Hais txog LiFePO4 cov ntaub ntawv, cais cov nag lossis daus los ntawm kev kub kub calcination, alkali dissolution, acid leaching, thiab lwm yam, kom rov qab tau cov nyiaj txiag feem ntau ntawm Li cov ntsiab lus, thiab tuaj yeem rov qab tau cov hlau thiab lwm yam hlau ib txhij, siv NaOH alkali tov kom yaj cov electrode zoo, yog li Cov txhuas ntawv ci tuaj yeem nkag mus rau hauv cov tshuaj hauv NaalO2, sulfural acid lim. kom tau txais Al (OH) 3, thiab rov qab los ntawm Al.

Cov lim dej seem yog LiFePO4, tus neeg saib xyuas cov pa roj carbon dub thiab LiFePO4 cov khoom nto coated carbon, thiab lwm yam. Muaj ob txoj hauv kev rov ua dua LifePO4: Txoj kev yog siv los yaj cov slag nrog hydrogen sulfuric acid kom yaj cov slag nrog hydroxide, kom cov tshuaj hauv Fe2 (SO4) 3 thiab Li2SO4, cov lim dej tom qab sib cais ntawm cov pa roj carbon impurities yog kho nrog NaOH thiab ammonia dej, ua ntej ua hlau Fe (OH) 3 residue CO3 precipitate; Txoj kev 2 yog raws li FEPO4 microolysis nyob rau hauv nitric acid, yaj lub zoo electrode cov ntaub ntawv lim residue nrog nitric acid thiab hydrogen peroxide, ua ntej ua lub FEPO4 precipitate, thiab thaum kawg precipitate nyob rau hauv Fe (OH) 3, Cov residual acid kua precipitates Li2CO3 rau saturated Na2COFe tov, thiab cov feem, precipitate. Li et al [6], raws li LIFEPO4 nyob rau hauv H2SO4 + H2O2 tov tov, Fe2 + yog oxidized rau hauv Fe3 +, thiab ua FEPO4 precipitate nrog PO43-binding, recovering hlau Fe thiab cais los ntawm Li, ntxiv raws li 3LI2SO4 + 2NA3PO4 → + 3cip ↓, PO4 → sib cais, sau, paub qhov rov qab ntawm hlau Li.

Cov khoom oxidizing yog yooj yim yaj nyob rau hauv cov tshuaj HCl, WANG, thiab lwm yam., LiFePO4 / C tov khoom hmoov yog calcined ntawm 600 ° C, xyuas kom meej tias cov ferri ions yog kiag li oxidized, thiab solubility ntawm LiFePO4 yog yaj nyob rau hauv acid, thiab rov qab Li yog 96%. Recycled LifePO4 tsom xam Tom qab tau txais precursor FePO4 · 2H2O thiab Li qhov chaw, synthesizing LiFepo4 cov ntaub ntawv yog ib qho kev tshawb fawb kub, ZHENG li al [8] kub daws rau electrode los xij, tshem tawm cov binder thiab carbon rau oxidize LIFEPO4 Fe2 + rau Fe3 +, tshuaj ntsuam Cov hmoov sulfuric yaj tau yaj, yaj thiab yaj hauv pH. 2 kom tau txais FEPO4 hydrate, thiab 5 h tau txais ntawm 700 ° C rau 5 teev kom tau txais FEPO4 cov khoom rov qab, thiab cov filtrate tau concentrated nrog Na2CO3 tov rau precipitate Li2CO3, thiab paub cov hlau.

Rov ua dua. Bian et al. tom qab pyrochlorination los ntawm phosphoric acid los ntawm phosphoric acid, nws yog siv kom tau FEPO4 · 2H2O, thiab raws li ib tug precursor, ib tug Li2CO3 thiab ib tug qabzib carbon thermal txo txoj kev los tsim ib tug LIFEPO4 / C composite, thiab Li nyob rau hauv cov ntaub ntawv rov qab yog precipitated nyob rau hauv LIH2PO4.

, Paub txog cov ntaub ntawv rov qab, thiab tom qab ntawd siv. Cov txheej txheem nag lossis daus tuaj yeem siv rau kev sib xyaw kom zoo ntawm cov hlau uas muaj txiaj ntsig zoo, thiab cov lus hais ua ntej yuav tsum tau qis ua ntej cov khib nyiab zoo, uas yog qhov zoo ntawm cov qauv no. Txawm li cas los xij, muaj cov khoom siv LifePO4 uas tsis muaj cobalt thiab lwm yam hlau zoo nkauj, cov qauv saum toj no feem ntau muaj qhov ntev, thiab kev yug me nyuam tsis zoo ntawm cov kua qaub siab thiab alkali pov tseg, cov nqi rov qab siab.

3.2 Kub kub khoom theem kho tshuab raws li cov txheej txheem lwj ntawm LIFEPO4 roj teeb thiab tus nqi thiab cov yam ntxwv ntawm cov khoom siv hluav taws xob zoo, cov qauv ntawm cov khoom zoo LIFEPO4 yog qhov ruaj khov, thiab qhov poob ntawm kev ua haujlwm Li yog ib qho tseem ceeb ntawm cov roj teeb muaj peev xwm attenuation, yog li cov khoom siv LIFEPO4 raug suav tias yuav tsum tau rov ua dua ntawm cov khoom siv LI thiab lwm yam kev puas tsuaj. Tam sim no, txoj kev txhim kho tseem ceeb muaj qhov kub siab ncaj ncaj los daws thiab ntxiv cov khoom sib xws.

Kev kub siab yog daws tau, thiab siv cov khoom siv hluav taws xob electrochemical ntawm cov ntaub ntawv rov qab los ntawm amurging, cov khoom siv ntxiv, thiab lwm yam. Xie Yinghao, thiab lwm yam. Tom qab dismantling lub roj teeb pov tseg, cais qhov zoo electrode, tom qab lub binder yog carbonized los ntawm cua sov nyob rau hauv nitrogen tiv thaiv, phosphate-lithium hlau-raws li cov khoom zoo.

Tus nqi ntawm FEC2O4 · 2H2O, Li2CO3, (NH4) 2HPO4 tswj Li, Fe, thiab P molar piv tau ntxiv rau 1.05: 1: 1, thiab cov ntsiab lus carbon ntawm calcined reactant raug kho rau 3%, 5%. Thiab 7%, ntxiv qhov tsim nyog ntawm anhydrous ethanol nyob rau hauv cov khoom (600R / min) pob milling rau 4 h, thiab nitrogen cua sov rau 700 ° C qhov kub thiab txias 24H roast LIFEPO4 khoom rau 10 ° C / min.

Yog li ntawd, cov khoom siv kho mob uas muaj cov ntsiab lus carbon ntawm 5% muaj cov khoom siv hluav taws xob zoo tshaj plaws, thiab thawj qhov sib piv ntawm 148.0mA · h / g; 1C hauv qab 0.1 C yog 50 npaug, qhov peev xwm tuav tau yog 98.

9%, thiab kev rov qab los yog Kev daws teeb meem Saib daim duab 4. Nkauj et al. Siv cov khoom theem siab kub siv cov ncaj sib xyaw LifePo4, thaum qhov loj piv ntawm cov khoom siv tshiab doped thiab cov khoom siv pov tseg rov qab yog 3: 7,700 ° C siab kub 8h tom qab 8h kho cov khoom electrochemical kev ua tau zoo.

Li et al. Siv los ntxiv Li Source Li2CO3 los siv LIFEPO4 cov ntaub ntawv ntawm 600 ° C, 650 ° C, 700 ° C, 750 ° C, 800 ° C hauv argon / hydrogen mixed gas. Thawj qhov tso tawm muaj peev xwm ntawm cov khoom siv yog 142.

9mA · h / g, qhov zoo tshaj plaws kho qhov kub thiab txias yog 650 ° C, thawj qhov tso tawm peev ntawm cov khoom kho yog 147.3mA · h / g, uas yog me ntsis txhim kho, thiab qhov kev nthuav dav thiab kev ua haujlwm tau zoo tuaj. Txoj kev tshawb no ntawm 都成, tshaj tawm tias Li2CO3 ntxiv 10% pov tseg cov khoom siv hluav taws xob zoo tuaj yeem them rov qab cov khoom siv lithium, thiab cov khoom txo qis tom qab kho cov khoom yog 157 mA, feem.

H / g thiab 73mA · h / g, lub peev xwm yuav luag tsis muaj attenuation tom qab 200 cycles hauv qab 0.5C. Qhov sib ntxiv ntawm 20% ntawm Li2CO3 yuav ua rau oligants xws li Li2CO3 Meng Li2O thaum lub sij hawm kho cov txheej txheem ci, uas ua rau txo qis coulombic efficiency.

Cov khoom siv hluav taws xob kub kub hloov kho tsuas yog ntxiv me me ntawm Li, Fe, P lub caij, tsis muaj cov kua qaub-puag reagent ntau, cov sprouting pov tseg cov kua qaub pov tseg alkali, cov txheej txheem ntws yog yooj yim, ib puag ncig tus phooj ywg, tab sis cov kev cai purity ntawm cov ntaub ntawv rov qab yog siab. Lub xub ntiag ntawm impurities txo electrochemical zog ntawm cov ntaub ntawv kho. 3.

3 Cov khoom siv hluav taws xob kub kub yog qhov sib txawv ntawm cov khoom kub-kub theem cwj mem ncaj qha kho thev naus laus zis, thiab cov txheej txheem kub rov ua dua tshiab yuav ua ntej daws cov khoom siv rov qab kom muaj cov khoom ua ntej nrog cov tshuaj tiv thaiv, thiab txhua lub caij tuaj yeem rov ua kom rov ua dua tshiab, thiab tom qab ntawd paub txog cov khoom siv rov ua dua tshiab. 都 成 保 保 保 保 分 3 分 分 3 分 3 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2材料 2 材料 2 2 Thiab qhov loj feem yog 25% qabzib (raws li lithium hlau phosphate), cov khoom siv rov ua dua LIFEPO4 / C zoo electrode tau txais ntawm 650 ° C, thiab cov khoom yog nyob rau hauv 0.1c thiab 20c thiab qhov tso tawm piv yog feem.

Nws yog 159.6mA · h / g thiab 86.9mA · h / g, tom qab 10C magnification, tom qab 1000 cycles, lub peev xwm reservoir reservoir regeneration ntawm LIFEPO4 zoo electrode khoom yog 91%.

Nrog rau cov ntaub ntawv saum toj no, tus sau tsab xov xwm no tau ua pov tseg ntawm LifePO4 cov ntaub ntawv nyob rau theem pib, "oxidation-carbon-thermal reduction" txoj kev tsim dua tshiab. Txoj kev rov tsim dua tshiab yog qhov tseem ceeb raws li Co txo ​​FEPO4 thiab LiOH precursor synthesis ntawm LiFePO4 cov ntaub ntawv rau Li3FE2 (PO4) 3 thiab Fe2O3, thaum LIFEPO4 oxidation kuj yog Li3FE2 (PO4) 3 thiab Fe2O3, thiab yog li ntawd, cov tshuaj thermal yuav rov qab los. Qhov zoo electrode raug tshem tawm los ntawm cov ntawv khi thiab tseem paub txog oxidation ntawm LIFEPO4.

Raws li cov khoom siv regenerative, nws yog cov piam thaj, ib qho hydrated citric acid, polyethylene glycol, 650--750 ° C high-temperature carbon heat reduction regeneration LIFEPO4, peb txo ob qho tib si regeneration LIFEPO4 / C cov ntaub ntawv tsis muaj impurities tuaj yeem tau. Cov khoom siv hluav taws xob kub kub, cov khoom siv LIFEPO4 rov qab los yog oxidized rau cov tshuaj tiv thaiv nruab nrab, thiab cov khoom siv LIFEPO4 yog tau los ntawm carbon thermal txo, thiab cov khoom muaj ib tug uniform oxidation thiab carbon thermal txo cov txheej txheem thermodynamic, thiab cov khoom siv regenerative muaj peev xwm tswj tsis kam, cov txheej txheem ntws yooj yim, tab sis, zoo ib yam li kub kub khoom theem kho cov ntaub ntawv rov qab, cov txheej txheem no yog cov ntaub ntawv zoo. yog tsim nyog. 3.

4 Biological leaching technology Biological leaching technology Nyob rau hauv lub rov qab ntawm lub qub roj teeb, thawj zaug siv cov nickel-cadmium pov tseg roj teeb rov qab tau cadmium, npib tsib xee, hlau, Cerruti, thiab lwm yam., yaj, txo cov khib nyiab nickel-cadmium roj teeb, rov qab, 100%, feem. npib nickel 96.

5%, hlau 95%, yaj lub sij hawm leaching yog 93 hnub. XIN et al. Nws siv sulfur-sulfide thiobacillus, Caucite-Rotel nuv-sab kauv kab kab mob thiab (sulfur + yellow iron ore - sulfur sulfurium) mixing system los daws LiFepo4, LiMn2O4, LiniXCoyMN1- X-YO2, wherein thiosidide thiobacillus system ntawm LiFepo4 thiab LiFepo4% nyob rau hauv LiFePO4 yog 95%, thiab leaching tus nqi ntawm Mn yog 96%, thiab Mn yog optimized.

Qhov sib tov yog siab dua 95% ntawm cov khoom sib xyaw ntawm Li, Ni, Co, thiab Mn raws li Li, Ni, Co, thiab Mn nyob rau hauv cov nqe lus ntawm cov khoom siv. Kev tawg ntawm Li yog qhov tseem ceeb vim yog kev sib cais ntawm H2SO4, thiab kev sib cais ntawm Ni, Co, thiab Mn yog Fe2 + txo thiab acid dissolution composite siv. Nyob rau hauv kev siv tshuaj lom neeg leaching, lub voj voog ntawm biofushes yuav tsum tau cog qoob loo, thiab lub sij hawm tawg leaching yog ntev, thiab thaum lub sij hawm dissolution txheej txheem, cov nroj tsuag yog yooj yim inactivated, txwv tsis pub siv technology nyob rau hauv industrial siv.

Yog li ntawd, ntxiv txhim kho cov kab lis kev cai tshaj tawm ntawm cov kab mob, adsorbing hlau ion ceev, thiab lwm yam, txhim kho tus nqi leaching ntawm hlau ions. 3.

5 Mechanical activation Solve Recycling Technical activation tuaj yeem ua rau lub cev thiab tshuaj hloov pauv hauv qhov kub thiab txias tsis tu ncua, suav nrog cov theem hloov pauv, kev ua haujlwm tsis zoo, strain, amorphization, lossis txawm tias muaj kev cuam tshuam ncaj qha. Hauv kev siv cov roj teeb pov tseg rov qab, nws muaj peev xwm txhim kho kev rov qab ua haujlwm zoo nyob rau hauv chav tsev kub. Fan et al.

, Siv lub roj teeb tag nrho tawm hauv cov tshuaj NaCl, thiab cov LIFEPO4 rov qab tau siab rau 5 teev los ntawm 700 ° C kom tshem tawm cov organic impurities. Mechanically ua kom muaj kev sib xyaw ntawm cov khoom siv rov qab rau kev sib xyaw nrog cov nyom acid. Cov txheej txheem ua kom lub tshuab ua kom muaj zog yog qhov tseem ceeb kom suav nrog peb kauj ruam: particle loj txo, tshuaj lom neeg daim ntawv cog lus, daim ntawv cog lus tshiab.

Tom qab kev sib tsoo tshuab ua haujlwm, cov khoom sib xyaw ua ke thiab cov hlaws zirconia tau muab yaug nrog dej deionized thiab soaked rau 30 min, thiab cov lim tau nplawm ntawm 90 ° C kom evaporate kom txog thaum Li + muaj concentration ntau dua 5 g / L, thiab pH rau 4 ntawm cov lim tau kho nrog 1 OH / L. Thiab txuas ntxiv mus kom txog thaum cov concentration ntawm Fe2 + tsawg dua 4 mg / L, yog li tau txais cov purity filtrate siab. Tom qab filtration, purified lithium tov tau hloov mus rau 8, stirred ntawm 90 ° C rau 2 h, thiab precipitate tau sau thiab qhuav ntawm 60 ° C rau Li rov qab cov khoom.

Tus nqi rov qab ntawm Li tuaj yeem ncav cuag 99%, thiab Fe rov qab los ntawm FEC2O4 · 2H2O. Tus nqi rov qab yog 94%. YANG et al.

Raws li kev siv ultrasonic auxiliary, cov khoom siv electrode zoo yog sib cais los ntawm cov hmoov electrode zoo thiab sodium ethylenediamine tetracetate (EDTA-2NA), uas siv lub pob zeb planetary rau kev ua kom txhua yam. Tom qab txuas ntxiv leaching ntawm cov qauv siv nrog dilute phosphoric acid, leaching tiav, thiab cellulose membrane yog nqus pom nrog acetate zaj duab xis, cov kua filtrate muaj lithium, hlau hlau ions, Fe, Li hauv phosphoric acid tuaj yeem ncav cuag 97.67%, 94.

29, ua. %. Cov filtrate tau refluxed ntawm 90 ° C rau 9 h, thiab cov hlau Fe yog precipitated nyob rau hauv daim ntawv ntawm FEPO4 · 2H2O, Li, thiab cov precipitate tau sau thiab qhuav.

Zhu et al. Yog sib xyaw nrog lecithin los ntawm LiFePO4 / C zoo. Tom qab cov khoom siv hluav taws xob ua kom muaj tshuaj lom neeg, 4 h yog sintered ntawm 600 ° C hauv qab AR-H2 (10%) sib xyaw ua ke, tau txais (C + N + P) Coated regeneration LifePO4 composite.

Nyob rau hauv cov khoom siv regenerative, NC tus yuam sij thiab PC yuam sij yog them nrog LiFePO4 los ua ib qho ruaj khov C + N + P co-clad coated txheej, thiab cov khoom siv rov ua dua tshiab yog me me, uas tuaj yeem ua rau luv luv Li + thiab txoj kev diffusion ntawm LI + thiab electrons. Thaum tus nqi ntawm cov lecithin yog 15%, lub peev xwm ntawm cov khoom siv rov qab mus txog 164.9mA · h / g thaum lub sij hawm qis ntawm 0.

2c ib. 3.6 Lwm Cov Kev Siv Rov Ua Dua - Ib qho Electrochemical Recycling Solution Technology Yang Zeheng li al, siv 1-methyl-2 pyrrolidone (NMP) kom yaj cov khib nyiab LIFEPO4 (NMP), khaws cov ntaub ntawv LIFEPO4 rov qab, cov ntaub ntawv rov qab thiab cov khoom siv hluav taws xob, binders Kev npaj rau cov electrode yuav tsum tau kho, cov roj teeb tsis zoo yog cov khoom siv hluav taws xob zoo li qub.

Tom qab ntau tus nqi thiab tso tawm, lithium yog embedded los ntawm qhov tsis zoo electrode rau hauv cov khoom siv electrode, ua rau cov electrode zoo los ntawm lub xeev lithium mus rau lithically, ua tiav cov txiaj ntsig kho. Txawm li cas los xij, cov khoom siv hluav taws xob kho yog tom qab ntawd sib sau ua ke hauv lub roj teeb tag nrho, nws nyuaj rau kev siv cov nplais ncaj qha. 4 Electrolytic kua rov qab technology Kev nce qib.

SUN li al, daws cov electrolyte thaum siv lub tshuab nqus tsev pyrolysis kom rov qab cov roj teeb pov tseg. Muab cov khoom sib cais zoo electrode nyob rau hauv lub tshuab nqus tsev vacuum, qhov system yog tsawg dua 1 kPa, qhov txias txias ntawm qhov ntxiab txias yog 10 ° C. Lub tshuab nqus tsev vacuum tau rhuab ntawm 10 ° C / min, thiab tau tso cai ntawm 600 ° C rau 30 min, cov volatiles nkag mus rau hauv lub condenser thiab condensed, thiab cov roj uas tsis yog tiav tau muab rho tawm los ntawm lub tshuab nqus tsev twj tso kua mis, thiab thaum kawg sau los ntawm cov roj collector.

Cov binder thiab electrolyte yog volatilized los yog soj ntsuam raws li cov khoom uas tsis muaj molecular hnyav, thiab feem ntau ntawm cov khoom pyrolysis yog organic fluorocarbon tebchaw rau enrichment thiab rov qab. Cov txheej txheem organic solvent extraction yog hloov cov electrolyte rau cov extractant los ntawm kev ntxiv cov organic hnyav rau cov extractant. Tom qab rho tawm, distillation lossis fractionation, sau lossis cais cov tshuaj electrolytic tom qab rho tawm cov ntsiab lus sib txawv ntawm txhua qhov khoom hauv cov khoom rho tawm.

Tongdong tawv, nyob rau hauv cov kua nitrogen tiv thaiv, txiav cov khib nyiab roj teeb, tshem tawm cov active tshuaj, muab cov active khoom nyob rau hauv cov organic hnyav rau ib lub sij hawm ntawm leach lub electrolyte. Kev sib xyaw ua haujlwm ntawm cov tshuaj electrolytic tau muab piv, thiab cov txiaj ntsig tau tshaj tawm cov lus tshaj tawm ntawm PC, DEC thiab DME, thiab qhov kev rho tawm ntawm PC yog qhov ceev tshaj plaws, thiab cov electrolyte tuaj yeem raug tshem tawm tag nrho tom qab 2 teev, thiab PC tuaj yeem rov siv ntau zaus, uas tej zaum yuav yog vim cov PCs sib txawv nrog cov hluav taws xob loj yog cov dej qab ntsev ntau dua. Supercritical CO2 recycled pov tseg-dawb lithium ion roj teeb electrolyte yog hais txog cov txheej txheem ntawm electrolytic kua adsorbed nyob rau hauv ib tug supercritical CO2 raws li ib tug extractant, cais ib tug lithium ion roj teeb diaphragm thiab ib tug active khoom.

Gruetzke et al. Kawm txog cov nyhuv extraction ntawm cov kua CO2 thiab supercritical CO2 ntawm electrolyte. Hais txog cov txheej txheem electrolyte uas muaj LiPF6, DMC, EMC thiab EC, thaum cov kua CO2 siv, qhov rov qab ntawm DMC thiab EMC yog siab, thiab qhov rov qab ntawm EC yog tsawg, thiab tag nrho cov nqi rov qab yog siab thaum rov qab los ntawm EC yog tsawg.

Qhov kev ua tau zoo ntawm cov tshuaj electrolytic yog siab tshaj nyob rau hauv cov kua CO2, thiab cov extraction efficiency ntawm cov electrolyte tuaj yeem ua tiav (89.1 ± 3.4)% (feem ntau).

LIU li al, supercritical CO2 extractive electrolyte ua ke nrog dynamic extraction tom qab thawj static extraction, thiab 85% extraction tus nqi yuav tau. Nqus pyrolysis thev naus laus zis rov qab cov tshuaj electrolytic kom ua tiav cov tev ntawm cov khoom siv thiab cov kua dej tam sim no, ua kom yooj yim rau cov txheej txheem rov qab, tab sis cov txheej txheem rov qab muaj ntau dua kev siv zog, thiab daws cov fluorocarbon organic compound ntxiv; cov txheej txheem organic solvent extraction tuaj yeem rov qab tau Ib qho tseem ceeb ntawm cov electrolyte, tab sis muaj ib qho teeb meem ntawm high extraction hnyav nqi, sib cais nyuaj thiab tom qab sprouts, thiab lwm yam .; Supercritical CO2 extraction thev naus laus zis tsis muaj cov kuab tshuaj residue, kev sib cais yooj yim hnyav, txo cov khoom lag luam zoo, thiab lwm yam.

, yog lithium ion roj teeb Ib qho ntawm cov kev tshawb fawb qhia ntawm cov khoom siv hluav taws xob rov ua dua tshiab, tab sis kuj tseem muaj ntau ntawm CO2 noj, thiab tus neeg sawv cev entrained yuav cuam tshuam rau kev rov siv cov electrolyte. 5 Cov txheej txheem tsis zoo electrode rov qab Decompose los ntawm LIFEPO4 roj teeb tsis ua hauj lwm mechanism, qhov degree ntawm kev lag luam hauv qhov tsis zoo graphite kev ua tau zoo yog ntau dua li cov khoom zoo LiFePO4, thiab vim tus nqi qis ntawm qhov tsis zoo electrode graphite, tus nqi yog me me, qhov rov qab thiab kev lag luam tsis muaj zog, tam sim no Recycling kev tshawb fawb ntawm cov khoom siv hluav taws xob tsis zoo. Hauv qhov tsis zoo electrode, cov ntawv ci tooj liab yog kim thiab cov txheej txheem rov qab yog yooj yim.

Nws muaj tus nqi rov qab siab. Cov graphite hmoov zoo yuav tsum tau nyob hauv cov roj teeb ua haujlwm los ntawm kev hloov kho. Zhou Xu et al, kev tshuaj ntsuam kev vibration, kev tshuaj ntsuam kev vibration thiab airflow sorting txheej txheem sib cais thiab rov qab khib nyiab lithium ion roj teeb tsis zoo electrode cov ntaub ntawv.

Cov txheej txheem txheej txheem yog pulverized rau hauv lub rauj rupture tshuab mus rau ib tug particle txoj kab uas hla ntawm tsawg tshaj li 1 hli, thiab lub rupture yog muab tso rau ntawm lub fluidized txaj faib phaj los tsim ib tug ruaj txaj; qhib lub kiv cua kho cov roj ntws tus nqi, tso cai rau lub txaj me me los kho lub txaj, Lub txaj yog xoob, thiab cov kua dej pib yog kom txog thaum cov kua dej txaus, cov hlau yog sib cais los ntawm cov khoom tsis yog hlau, uas lub teeb tivthaiv tau sau los ntawm airflow, sau cov cyclone separator, thiab cov recombination yog khaws cia rau hauv qab ntawm lub txaj fluidized. Cov txiaj ntsig tau tshaj tawm tias tom qab cov khoom siv hluav taws xob tsis zoo raug tshuaj xyuas, qhov loj me yog 92.4% hauv qhov tawg ntawm qhov loj ntawm ntau tshaj 0.

250 hli, thiab qib ntawm lub toner yog 96.6% nyob rau hauv qhov tawg ntawm tsawg dua 0.125 hli, thiab nws tuaj yeem rov qab tau; Ntawm cov ruptures ntawm 0.

125--0.250mm, qib ntawm tooj liab yog tsawg, thiab kev sib cais zoo thiab rov qab los ntawm tooj liab thiab toner tuaj yeem ua tiav los ntawm kev faib cov pa roj. Tam sim no, qhov tsis zoo electrode feem ntau yog raws li cov ntaub ntawv aqueous, thiab cov binder tuaj yeem yaj hauv cov tshuaj aqueous, cov khoom siv electrode tsis zoo thiab cov khoom siv tooj liab tuaj yeem sib cais los ntawm cov txheej txheem yooj yim.

Zhu Xiaohui, thiab lwm yam., tau tsim ib txoj hauv kev siv cov txheej txheem ultrasonic ancillary acidification thiab ntub dej rov qab. Daim ntawv tsis zoo electrode yog muab tso rau hauv ib lub dilute hydrochloric acid tov, thiab cov ntawv ncaj graphite thiab cov ntawv sau tooj liab tau sib cais, thiab cov khoom siv tau ntxuav, thiab rov ua tiav tiav.

Cov khoom siv graphite yog lim, qhuav, thiab sib cais sib cais kom tau txais cov khoom lag luam graphite crude zoo. Cov khoom nyoos yog daws nyob rau hauv ib tug oxidizing tus neeg sawv cev xws li nitric acid, oxidic acid, tshem tawm cov hlau compound nyob rau hauv cov khoom, lub binder, thiab graphite nto germination functionalized pab pawg neeg, uas ua rau ib tug thib ob purification graphite khoom tom qab sau kom qhuav. Tom qab cov khoom siv graphite thib ob tau muab tso rau hauv qhov txo cov dej aqueous ntawm ethylenediamine lossis diviniscin, tom qab ntawd kev tiv thaiv nitrogen yog thermally daws los kho cov khoom siv graphite, thiab hloov graphite hmoov rau roj teeb tuaj yeem tau.

Cov hluav taws xob tsis zoo ntawm cov roj teeb pov tseg nyiam siv cov khoom sib txuas, yog li cov khoom siv thiab cov khoom siv tooj liab tuaj yeem raug tev tawm los ntawm txoj kev yooj yim, thiab cov pa rov qab ntawm cov khoom siv tooj liab zoo, cov khoom siv graphite pov tseg yuav ua rau cov ntaub ntawv pov tseg zoo. Yog li ntawd, txhim kho kev hloov kho thiab kho thev naus laus zis ntawm graphite cov ntaub ntawv, paub txog kev rov siv cov ntaub ntawv pov tseg graphite hauv kev lag luam roj teeb lossis lwm yam kev lag luam. 6 Cov txiaj ntsig kev lag luam ntawm kev rov ua dua kev lag luam decomposition ntawm lithium hlau phosphate pov tseg roj teeb rov qab tau cuam tshuam zoo heev los ntawm cov nqi raw khoom, suav nrog cov roj teeb khib nyiab rov qab, tus nqi nyoos carbonate, lithium hlau phosphate nqi, thiab lwm yam.

Kev siv cov txheej txheem ntub dej siv tam sim no, qhov kev lag luam zoo tshaj plaws ntawm cov khib nyiab phosphate ion roj teeb yog lithium, cov nyiaj tau los rov qab yog li 7800 yuan / ton, thiab cov nqi rov qab yog li 8,500 yuan / ton, thiab cov nyiaj tau los rov qab tsis tuaj yeem thim rov qab. Cov nqi rov ua dua tshiab, qhov twg cov lithium hlau phosphate rov qab cov nqi ntawm cov khoom qub tus nqi suav txog 27%, thiab tus nqi ntawm tus nqi excipient yog 35%. Tus nqi ntawm excipients tseem ceeb xws li hydrochloric acid, sodium hydroxide, hydrogen peroxide, thiab lwm yam.

(cov ntaub ntawv saum toj no los ntawm lub roj teeb alliance thiab kev sib tw) Di kev sib tham). Siv cov txheej txheem ntub dej, lithium tsis tuaj yeem ua tiav rov qab ua tiav (lithium rov qab feem ntau yog 90% lossis tsawg dua), phosphorus, hlau rov ua haujlwm tsis zoo, thiab siv ntau cov khoom siv ntxiv, thiab lwm yam, nws yog ib qho tseem ceeb uas yuav tsum siv cov txheej txheem ntub dej nyuaj kom ua tiav cov txiaj ntsig qub.

Lub lithium hlau phosphate khib nyiab roj teeb siv cov txheej txheem kub kub txheej txheem kev kho lossis kev tsim kho thev naus laus zis, piv nrog cov txheej txheem ntub dej, cov txheej txheem rov qab tsis muaj alkali yaj cov kua nplaum txhuas thiab cov kua qaub yaj cov khoom siv electrode zoo lithium hlau phosphate thiab lwm cov txheej txheem, yog li kev siv cov khoom siv loj. Txo, thiab kub kub khoom theem kho los yog regenerative technology txoj kev, siab rov qab ntawm lithium, hlau thiab phosphorus ntsiab yuav muaj ntau dua cov kev pab cuam rov qab, raws li cov kev cia siab ntawm Beijing Saidmy, siv high kub kho txoj cai Cheebtsam ub technology txoj kev, yuav muaj peev xwm ua kom tiav kwv yees li 20% net profit. 7 Thaum cov khoom siv rov qab yog cov khoom siv sib xyaw ua ke, nws yog qhov tsim nyog rau kev rov qab los ntawm cov hlau los ntawm cov txheej txheem nag lossis daus los yog cov khoom siv tshuaj lom neeg, thiab cov khoom siv tshuaj lom neeg tuaj yeem rov qab siv tau, tab sis hais txog LiFePO4 cov ntaub ntawv, cov ntaub ntub dej rov qab tau ntev dua, siv cov kua qaub-puag reagents ntau dua thiab daws cov kua qaub-base khib nyiab ntau, muaj cov nqi qis thiab kev lag luam rov qab.

Piv nrog rau cov tshuaj los nag lossis daus txheej txheem, kev kho kub kub thiab cov txheej txheem kub kub rov ua dua tshiab muaj lub sijhawm luv luv, thiab cov kua qaub-base reagent tsawg tsawg, thiab cov kua qaub pov tseg alkali tsawg dua, tab sis txoj hauv kev yuav tsum tau daws los yog rov tsim dua kev daws teeb meem. Kev nruj nruj kom tiv thaiv electrochemical cov khoom ntawm impurities tseem cuam tshuam cov ntaub ntawv. Cov impurities muaj xws li me me ntawm aluminium ntawv ci, tooj liab ntawv ci, thiab lwm yam.

Ntxiv nrog rau qhov teeb meem, nws yog ib qho teeb meem ncaj nraim, thiab cov txheej txheem rov tsim dua tshiab tau kawm hauv kev siv loj tab sis tsis yog qhov teeb meem xav tau. Txhawm rau txhim kho cov txiaj ntsig kev lag luam ntawm cov roj teeb pov tseg, cov khoom siv hluav taws xob tsis zoo thiab cov khoom siv hluav taws xob tsis zoo yuav tsum tau tsim kho ntxiv, thiab cov khoom siv tseem ceeb hauv cov roj teeb khib nyiab yog qhov ua kom zoo tshaj plaws kom rov zoo.