Indlela yokulungiselela izinto ezintle ze-electrode lithium iron phosphate

Umbhali :Iflowpower-UMboneleli weSikhululo saMandla esiphathwayo

I-lithium iron phosphate ikhona ngendlela ye-phosphate lithium ore kwindalo, inokwakheka kwe-olivine ehlelekile. I-lithium phosphate chemical formula ye-molecular is: LIMPO4, apho i-lithium ilungile; intsimbi yeziko lentsimbi lixabiso elifanelekileyo; iphosphate inegetive-amaxabiso amathathu, edla ngokusetyenziswa njengesixhobo semathiriyeli yebhetri ye-lithium. Ukusetyenziswa kweebhetri ze-lithium iron phosphate zezi: izixhobo zokugcina amandla, izixhobo zombane, izithuthi zombane ezikhanyayo, izithuthi zombane ezinkulu, izixhobo ezincinci kunye namandla ahambayo, kubandakanywa ne-lithium iron phosphate kunye ne-akhawunti entsha yezithuthi zombane ze-45% yexabiso elipheleleyo le-phosphite.

Okwesibini, i-lithium iron phosphate njengezinto ze-lithium electrode xa kuthelekiswa nezinye izinto ezintle ze-lithium zebhetri, isakhiwo se-olivine sikhuselekile ngakumbi, sinobuhlobo bendalo, singabizi, ixesha elide, ukusebenza kobushushu obuphezulu, njl., yeyona lithium ion enamandla kakhulu Enye yebhetri. izinto ezilungileyo. Ukusebenza kokhuseleko kuyisitshixo esiqinileyo se-P-O kwiikristale ze-phosphate ephezulu, kunzima ukubola, kwaye ayiyi kuchithwa ngokwesakhiwo okanye ivelise i-oxides eqinile ngexesha lokugqithisa kunye nokushisa okuphezulu.

Ubomi obujikelezayo Ubomi bomjikelo webhetri ekhokelela kwi-asidi ende bujikeleze amaxesha angama-300, ubomi benkonzo buphakathi kwe-1 kunye ne-1.5 iminyaka. Kwaye inani le-lithium yentsimbi ye-phosphate ibhetri inokufikelela ngaphezu kwe-2,000, ithiyori isebenzise ubomi beminyaka eyi-7-8.

Ubushushu obuphezulu bokusebenza bubushushu obuphezulu bentsimbi-free phosphate thermal incopho ukuya ku-350 ° C ukuya ku-500 ° C, ngelixa lithium manganate kunye ne-lithium cobaltate imalunga nama-200 ° C kuphela. Ibhetri ye-lithium iron phosphate ehambelana nokusingqongileyo ithathwa njengengaqulathanga isinyithi esinzima. kunye neentsimbi ezinqabileyo, ezingenatyhefu, ezingangcolisi, yibhetri eluhlaza ngokupheleleyo. Indlela yokuhlawula kunye nokukhupha i-lithium iron phosphate njengento efanelekileyo ye-electrode ihluke kwezinye izinto eziqhelekileyo, kwaye intlawulo kunye nokukhutshwa kwe-electrochemical ibonisa izigaba ezibini ze-lithium iron phosphate, ukuhlawulwa kunye nokukhupha ukusabela ngolu hlobo lulandelayo: ukutshaja ukusabela: Ukukhutshwa. impendulo: Intlawulo, i-Li + esuka kwi-LifePO4, i-Fe2 + ilahlekelwe yi-electron kwi-FE3 +; xa ikhutshwe, i-Li + ifakwe kwi-iron phosphite kwi-LifePo4.

Utshintsho lwe-Li + lwenzeka kwi-Lifepo4 / Fepo4 interface, ngoko i-curve kunye ne-dicharge curve ilula kakhulu, ikhono libuye lizinzile, lilungele izinto ze-electrode. Okwesithathu, ukulungiswa kwe-lithium iron phosphate ukulungiselela izithako kunye ne-lithium iron phosphate. Omnye umthombo oqhelekileyo we-lithium, umthombo wesinyithi, umthombo wekhabhoni, kunye nomthombo we-phosphorus zimi ngolu hlobo lulandelayo: Ukulungiswa kwe-lithium iron phosphate powder kunokuchaphazela ukusebenza kwayo njengento efanelekileyo.

Kukho iindlela ezininzi zokulungiswa kwe-lithium ye-iron phosphate, efana nobushushu obuphezulu bokusabela kwesigaba esiqinileyo, indlela yokunciphisa i-carbon thermal, kunye ne-unminerated hydrothermal method, isisombululo se-thermal sokutshiza, indlela ye-sol-gel, indlela yemvula epheleleyo, njl. isigaba reaction indlela iqondo lobushushu eliphezulu esomeleleyo isigaba reaction indlela kukulungisa lithium iron phosphate lolona phuhliso luqolileyo kuphuhliso lwangoku kunye nendlela esetyenziswa kakhulu.

Emva komthombo wesinyithi, umthombo we-lithium, umthombo we-phosphorus uxutywe kunye nemitha yeekhemikhali ngaphezu kokuxutywa ngokulinganayo, kwindawo engasebenzi, kuqala i-sintered 5 ukuya kwi-10 h kwiqondo lokushisa eliphantsi (300 ~ 350 ° C), ukuze izinto ezikrwada ziqale. ibolile, ngoko kubushushu obuphezulu (600 ~ 800 ° C) Sintering 10 ~ 20h ukufumana uhlobo olivine lithium iron phosphate. Ubushushu obuphezulu besigaba sendlela yokudityaniswa kwenkqubo ye-lithium yentsimbi ye-phosphate ilula, iimeko zokulungiselela kulula ukuzilawula, into embi kukuba ubukhulu bekristale bukhulu, i-particle idayamitha ayilula ukuyilawula, ukusasazwa akulingani, imilo nayo ayiqhelekanga. , uluhlu lwemveliso luhluphekile. 2.

Indlela yokunciphisa i-Carbonatic thermal reduction indlela yokunciphisa i-carbon thermal kukongeza imithombo yekhabhoni (isitatshi, i-sucrose, njl.) kumxube wezinto eziluhlaza, ezidla ngokusetyenziswa kunye nesigaba esiqinileyo sobushushu obuphezulu, kunye nomthombo wekhabhoni unokunciphisa i-Fe3 + kwi-calcination ephezulu yokushisa ukuya kwi-Fe2 + , Kuphephe ukusabela ngexesha lokusabela ukuba ube yi-Fe3 +, ukuze inkqubo yokudibanisa ibe nengqiqo ngakumbi, kodwa ixesha lokuphendula lide, kwaye ulawulo lungqongqo. 3.

Ukutshiza isisombululo sobushushu se-pyrolysis yindlela esebenzayo yokufumana ubungakanani bamasuntswana afanayo kunye nemilo eqhelekileyo ye-lithium iron phosphate powder. I-precursor i-inseed ye-reactor ye-450 ukuya kwi-650 ° C kunye ne-carrier carrier, kunye ne-lithium iron phosphate ifunyenwe emva kokuphendula kweqondo lokushisa eliphezulu. I-precursor inkungu eyi-spherical spherical spheroid elungiswe yi-spray pyrolysis iphezulu, kwaye ukuhanjiswa kobungakanani bamasuntswana bufana.

Emva kokusabela kwiqondo lokushisa eliphezulu, ipneumophosphate ifumaneka. I-Lithium ye-iron phosphate sphere inceda ekwandiseni indawo ethile yomgangatho wezinto, ukonyusa umthamo womthamo wezinto eziphathekayo. 4.

Indlela yokufudumeza amanzi yindlela yokwenziwa kwesigaba solwelo, ibhekisa kwindlela yokusabela kweekhemikhali kwinqanawa yoxinzelelo etywiniweyo kwisitya soxinzelelo esitywiniweyo, kwaye ithathwa ngokwekhemikhali ngento ekrwada, ihlanjwe ngokuhluzwa, yomiswe emva kokumisa. Ilithium iron phosphate inokufumaneka emva kokuba ubushushu obuphezulu bubaliwe. Ukulungiswa kwe-ferrite kwindlela ye-hydrothermal ineenzuzo zokulawula okulula kwefom ye-crystalline kunye nobukhulu be-particle, i-avareji ye-particle diameter, i-particle encinci ye-particle, inkqubo elula, kodwa idinga ukushisa okuphezulu kunye nezixhobo zoxinzelelo oluphezulu, ixabiso eliphezulu, inkqubo enzima.

Ukongeza kule ndlela ingasentla, kukho indlela eqhelekileyo yemvula, indlela ye-sol-gel, indlela yokunciphisa i-oxidative, i-emulsified drying method, kunye ne-microwave sintering method. 4. Isishwankathelo Nangona indlela yokulungiselela i-lithium ye-iron phosphate ingaphezulu kakhulu, ngaphandle kobushushu obuphezulu besigaba sokusabela indlela, uninzi lwenqanaba lophando lwebhubhoratri.

Ngokunzulu okuqhubekayo kokulungiswa kwe-phosphate kunye nokuguqulwa, isantya soshishino lwe-ferrite phosphate sihlala sikhawuleza. Ukuze ufunde inkqubela ye-lithium yentsimbi ye-iron-ion yamva nje yezinto eziphathekayo, nceda ubhalisele i-2017 Energy Particle Material Preparation kunye neSemina yeTekhnoloji yoVavanyo ngo-Oktobha 16-17! Ngelo xesha, uNjingalwazi, uNjingalwazi, uHu Guorong, iYunivesithi yaseCentral South, uya kwabelana ngengxelo "yeLithium-Ion yeBattery Positive Code Material Lithium Lithium Lithium Industrialization". USekela Mlawuli weZiko leMetallurgy kunye nokusiNgqongileyo, iYunivesithi yaseCentral South, uSekela Mlawuli weZiko leTekhnoloji, iSebe leBattery ePhambili, iSebe lezobuNjineli, iChina, iChina Chemistry kunye nePhysical Power Association, i-China Lithium Battery Association, iKhomishoni yokuBonelwa kwamandla ngamazwe ngamazwe, IKomiti yoNxibelelwano lwebhetri yeLithium.

Ikakhulu ibandakanyeka kwithiyori ye-electrochemical kunye nokusetyenziswa, izixhobo zamandla kunye neminye imiba, kwaye ifezekise iziphumo eziphuma phambili kuphuhliso kunye noshishino lwe-lithium-ion ibhetri ye-electrode efanelekileyo. Bamba kwaye uthathe inxaxheba kwiiprojekthi zophando lwenzululwazi kuzwelonke nakwiphondo, kubandakanywa iprojekthi ekhethekileyo yoshishino olukhulu lweKomishoni yoPhuhliso noHlaziyo yeSizwe, enye yeSebe lezeNzululwazi nobuChwepheshe beSizwe ka-863, inoxanduva lwenzululwazi nobuchwepheshe besizwe. Iprojekthi yesicwangciso senkxaso, iprojekthi yesicwangciso setotshi yesizwe Izinto kunye neeprojekthi ezininzi eziphambili zenzululwazi nezobuchwepheshe kwiPhondo laseHunan. Iziphumo eziphumayo ziye zaphunyezwa kwi-industrialization ye-lithium-ion ibhetri ye-electrode ye-electrode, kwaye ifezekise ngempumelelo i-lithium cobalt organism, i-lithium manganate kunye ne-lithium iron phosphate.

Malunga ne-2017 Energy Granular Material Preparation and Testing Technology Seminar Le ntlanganiso ijolise ekuboneleleni ngamaqonga onxibelelwano kubaphengululi abafanelekileyo ekhaya nakwamanye amazwe, ekusetyenzisweni kweegranule zamandla, ukomeleza utshintshiselwano ngolwazi lweshishini, ibhetri ye-lithium, i-capacitor, iseli yamafutha , Ukuphumelela kweteknoloji yebhetri yemoto yoMbane. yenza iminikelo. Umququzeleli: IKomiti ye-China Particle Society Energy Granular Materials Committee, i-China Powdered Network Association Unit: iNuremberg Exhibition (Shanghai) Co., Ltd.

Iiyunithi ezixhasiweyo: Kawaguklang (Shanghai) Powder Machinery Co., Ltd., Dandong Baite Instrument Co.

, Ltd. Jiangsu Miyou Powder New Equipment Manufacturing Co., Ltd.

Iyunithi yeNkxaso: I-Ningbo Materials Technology kunye neZiko lobuNjineli, i-Academy yaseShayina yeSayensi, iZiko lobuNjineli beNkqubo, iYunivesithi yaseTsinghua, iZiko leFiziksi, i-Chinese Academy yeSayensi, i-China Academy of Sciences iDalian Chemical Physics, i-China Battery Industry Association, i-China Super Capacitor Industry Alliance , Dongguan Yifu Machinery Technology Co., Ltd., Shijiazhuang Day Powder Equipment Technology Co.

, Ltd., Jiangsu Highway Intelligent Equipment Co., Ltd.

, Linyi County Chasing RMB Co., Ltd., Guangzhou Zhonghuo Intelligent Equipment Co.

, Ltd. , Shenzhen Boyi Chemical Machinery Co., Ltd.

, Malvin Instrument Co., Ltd., Xinxiang Yangli Machinery Co.

, Ltd. I-angle yokulungiselela, uhlolisise iingenelo kunye nokungonakali kwezinto ezingundoqo zamandla ezifana neebhetri ze-lithium, iibhetri ze-sodium, ii-supercapacitors, iiseli ze-fuel; i-3:, umzekelo, iinqununu zamandla amatsha (njenge-graphene, i-carbon nanotubes, i-ternary lithium electrode, i-sodium ion battery electrodes, i-Metal lithium) iteknoloji kunye nokusetyenziswa kwayo kumashishini okugcina amandla kunye nokuguqulwa; amanqaku aphezulu 4: Impumelelo yobugcisa yamva nje yeegranule zamandla kunye neenkokheli zoshishino; ibalaselisa ezintlanu: imiboniso kunye neenkomfa, izinto zombane ze-lithium, izixhobo zokuvelisa i-supercapacitor, ukufumanisa iTekhnoloji kunye nesicelo somboniso omnye wokumisa. Gqamisa 6: Ukumiswa kweprojekthi.

Iibhetri ze-lithium zasekhaya, amashishini okuvelisa izinto zombane ze-lithium, inkokeli entsha yeprojekthi, ukubonisana kokubonisana nokuthenga. .