Imveliso esisiseko kunye nezilumkiso zokutshaja ibhetri ye-lithium

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I. Intsingiselo yokusebenza kwenkqubo yezinto kunye nenkcazo yendawo ethile yomphezulu (m2 / g): ibhekisa kumphezulu womhlaba wamasuntswana obunzima beyunithi. (Indlela yokuvavanya: ukubala i-argon volume adsorbed yimpahla yobunzima beyunithi).

Ubungakanani be-particle (μm): Inkcazo yezinto eziphathekayo, ibhekisela kububanzi bezinto eziphathekayo. I-D50 ichaza umndilili we-diameter ye-particle ye-material. Ubuninzi be-Vain Density (G / CM3): Izinto eziphathekayo zingcangcazela ubunzima bobunzima beyunithi ye-vibration yomatshini.

Ukongeza, kukwakho nemathiriyeli ngokwayo, uhlobo lwembonakalo, umthamo wokukhupha, ukusebenza kakuhle komthamo, umxholo wokungcola, kunye nezinto ezinjalo zikwayimiqobo yokusebenza kwezixhobo ezahlukeneyo. Okwesibini, izinto ezahlukeneyo kwi-electrode kunye neempawu zayo ezisisiseko zokusetyenziswa 1, i-agent conductive carbon inki conductive agents, i-carbon engathandekiyo, iipropati zokuqhuba kakuhle, i-adsorption enamandla, indawo enkulu yomhlaba, malunga ne-60-100 m2 / g, ngokwayo ayinayo umthamo. Artificial graphite conductive arhente, conductivity ihlwempuzekile ngaphantsi kwe inki carbon, kodwa indawo ethile umphezulu incinci, 10-30 mAh / g, nto leyo umthamo, malunga 290 mAh / g, leyo ingcono.

Kukho kwakhona i-graphite yendalo, kuxhomekeke kwi-conductivity yayo, ingaphinda isetyenziswe njenge-agent e-conductive, kodwa kunye ne-electrode engafanelekanga ngenxa yomthamo ophezulu. Kwaye i-nano-scale carbon fiber, i-conductivity efanelekileyo, ukusebenza kakuhle kokusebenza, kodwa ixabiso liyabiza. 2, izinto electrode ngokubanzi lithium ion ibhetri yesibini, kunye lithium cobaltate, eyakhe igram umthamo 135-150 mAh / g, ingxinano compact yi-3.

I-65-4.00 g / cc, i-LiCoO2 yibhetri ye-ion ye-lithium ene-electrode efanelekileyo inobude ombane wesekethe evulekileyo. Uphakamileyo kunamandla (ithiyori ngaphezu kwamandla 1068Wh / kg, umthamo wethiyori 274mAh / g), ubomi bomjikelezo omde, ukukhutshwa ngokukhawuleza, kodwa ixabiso liyabiza.

Izinto ezingalunganga ze-electrode: igraphite eyenziweyo, i-carbon microsphere yesigaba esiphakathi, ukuguqulwa kwegraphite yendalo, njl. Igraphite yokwenziwa eqhelekileyo: umthamo wegram 290-310mAh / g, ukuxinwa kwe-1.45-1.

55g/cc. Isigaba esiPhakathi se-carbon microspheres: umthamo wegram 310-320mAh / g, i-compaction 1.55-1.

65g/cc. Ukuguqulwa kwegraphite yendalo: umthamo wegram 320-340mAh / g, i-compact 1.55-1.

65g/cc. I-3, iglue ngokuqhelekileyo idume nge-PVDF, igama lekhemikhali yi-polyvinylidene fluoride, kwaye ubukhulu be-viscosity yayo buchatshazelwa bubunzima be-molecular, isikhundla seqela elisebenzayo kunye nenkqubo yokucubungula. Ngokubanzi, malunga nenkqubo efanayo yokucubungula, indawo efanayo yeqela elisebenzayo, ubunzima obukhulu be-molecular, buphezulu be-viscosity yayo, kodwa ngokunyuka kwe-viscosity, ukuhlaliswa kwayo kwe-slurry kubonakala ngakumbi.

I-CMC kunye ne-SBR ziyiglue esetyenziswa kwinkqubo yamanzi. I-CMC (i-carboxymethylcellulose): i-powder emhlophe okanye i-micro-yellow, yona ngokwayo ineempawu zokudibanisa, kodwa kwinkqubo yamanzi, ukusetyenziswa kwayo okusisiseko okanye ukusabalalisa izinto kunye ne-SBR. I-SBR (i-butadous-blene-blewell milk): ulwelo olumhlophe lwe-emulsion yebhanti emhlophe, i-polymer compound, exutywe ne-CMC, kunye nokusebenza kwayo kokudibanisa kungcono.

Okwesithathu, ibhetri yenza umsebenzi omhle ukuhlangabezana neemeko ezininzi zezinto eziphathekayo, ukwenza ukuba isebenze kakuhle, ingafikeleli kule miqathango ilandelayo: 1, ulwakhiwo ngokwalo, ubungakanani bobungakanani besuntswana, iigranules Ukuguquguquka kokubonakala; ukukhutshwa okufanayo kweemolekyuli ezisebenzayo kwi-electrode; I-3, i-molecule esebenzayo kunye ne-agent conductive uqhagamshelwano oluhle; 4, ukuqhuba ngokutyibilikayo uthungelwano; 5, kunye ne-electrolyte idigri elungileyo yokungena; I-6, nganye yeemeko zenkqubo ezilungileyo kwiipropati eziphathekayo. Okwesine, indlela yokuvuselela kunye nolandelelwano 1, i-glue i-PVDF ixuba: Ngokutsho kogxininiso oluza kuqwalaselwa, ubungakanani be-PVDF eyomileyo yomgubo ibhekiswa kuyo, ifakwe kwi-oven eyomileyo, bhaka i-60-120 min kwi-70-80 degrees, kwaye emva koko ibizwa ngokuba yi-NMP Kwisitya sokunamathela, isitya simisiwe, kwaye i-PDFV ifakwe kwi-powder eyomileyo, kwaye i-PDFV ifakwe kwi-powder eyomileyo, idityaniswe kwi-powder eyomileyo. yongezwa, isitya sitywinwe ngokusemandleni, sivuthulule 3-4h, de sinyibilike ngokupheleleyo, ngokucothayo uxhokonxe Itywina kangangexesha elithile ukususa amaqamza kwirabha okanye ugalele isisombululo sabo kwisikhongozeli esimisiweyo. Le rubber ilungile, ukugxininiswa kwayo ngokuqhelekileyo yi-12%.

I-CMC: Inyathelo lendlela ngokusisiseko liyafana, kodwa inkqubo yesisombululo isekelwe kumanzi, i-solvent ngamanzi e-deionized kunokuba i-NMP, kwaye ukuxinwa kwesisombululo ngokubanzi ngu-2-3.5%. 2, izinto zokubala ukuthatha izinto kwi-oven yokucoca i-4 h kwi-oven ye-vacuum ye-160, kwaye emva koko uvuselele, kwaye uvuselele, amanyathelo ngokubanzi alandelayo: 2.

1 Yongeza i-SP ye-conductive, kwaye uyimanzise ngexabiso elaneleyo le-NMP, kwaye Gxuma 10-20min. 2.2 Yongeza ezinye ii-conductive agents kwisinyathelo sokuqala, gxuma i-10-20 min.

2.3 Ukongeza iimveliso ezisebenzayo kunye nentlaka, ukuvuselela ngecephe, emva koko ugxobhoze kwi-stirrer ngesantya esiphezulu kuze kube kuthathwa njengento egudileyo kwaye iguqulelwe kwi-agitator ye-2 h, kwaye i-slurry iyadingeka kwisantya esiphezulu I-Thick stick, ifezekise injongo yokusabalalisa). 2.

4 Yilungelelanise ukuba yomelele, chumisa kancinane imizuzu engama-30 ukususa umphunga. 2.5 Susa uludaka, isihluzo.

I-3, izinto ezixubileyo 3.1 Yongeza i-agent ye-SP ye-conductive, imanzise ngexabiso elincinci le-NMP, ivuselele i-10-20min. 3.

2 Ukongeza ezinye arhente conductive, iimveliso esebenzayo, kunye CMC kunye isixa esifanelekileyo H2O, waxhokonxa ngecephe, waza washukunyiswa ngesantya esiphezulu kwi stirrer de kubonakale ukuba umphezulu ludaka ngakumbi agudileyo, kwaye ke elimisiweyo ukuxhokonxa kwisixhobo 1.2-1.5H (eli nyathelo lifuna ukujiya ngesantya esiphezulu ukuphumeza injongo yokusasazwa).

3.3 Ukongeza isixa esifanelekileyo se-H2O kwinyathelo lesibini. 3.

I-4 Ukongeza i-SBR eyaneleyo kwinqanaba eliphezulu, ukuvuselela kuchithwa ngokupheleleyo kwi-SBR, malunga ne-30 min. (Ifuna ubushushu obuphantsi kunye nesantya esicothayo xa ufaka i-SBR) 3.5 Yongeza isiqulatho samanzi aludaka 10-15% i-NMP (equlathe i-NMP kunye nenqanaba loku-1), chumisa iqamza, imizuzu engama-30.

3.6 Susa i-slurry, isihluzo. V.

Iingxaki eziqhelekileyo ekuvavanyeni, ukuxazulula ingxaki kunye nokuchaphazela i-1, injongo, ixesha kunye nobushushu bokubhaka. Izinto ze-Electrode: ukususa umswakama, ioli kunye nothuli, iimeko zokubhaka ngokubanzi i-160 degrees 4h. I-Glue: I-deflash ebalulekileyo, iimeko zokubhaka ngokubanzi i-70-80 degrees bhaka i-60-120min.

I-asidi ye-Oxic: ngaphezu komswakama kunye namanzi e-crystalline, iimeko zokubhaka ngokubanzi i-70-80 degrees ye-30-60 min. I-2, umgaqo wokusetyenziswa kwee-conductive agents. Ii-conductor zixutywa ngokubanzi, kusetyenziswa indlela yokukhupha.

3. Isiphumo se-ejenti ye-conductive eyongezwe kwibhetri. Abaqhubi banomthamo omncinci ochaphazelekayo, umjikelo, iqonga, iipropati zokukhutshwa kweqondo eliphezulu kunye nezantsi kunye nokukhutshwa okuphezulu kwangoku, ukusebenza kokhuseleko, ukuchasana kwangaphakathi, njl.

I-4, umahluko kumyalelo wokongezwa kwezithako kunye neenzuzo kunye nokungonakali. I-conductant kunye ne-adhesive yongeza ukulandelelana, i-oxalic acid yongeza ukulandelelana, i-NMP yongeza ukulandelelana kwizinto ezinamanzi, njl. I-5, iglu kunye nefuthe elincinci ekusebenzeni kwebhetri.

6. Iyintoni impembelelo yokupholisa ngokukhawuleza ngexesha lezithako. 7.

Indlela yokuhamba kunye nokongezwa kunye nesixa se-oxalic acid kwi-oily negative configuration kunye ne-oxalic acid. Kukho iinjongo ezimbini zokufudumeza kwegesi: susa i-oxide ye-surface layer ye-copper foil kwaye wenze i-groove ephazamisayo ebusweni be-copper foil, kunye nokufafaza kwe-slurry kwi-foil yobhedu. Ukusetyenziswa kwayo ngokubanzi yi-2% yePVDF.

I-8, i-CMC, ukusetyenziswa kwe-SBR kunye nokuQapha kuManzi. Zombini i-CMC kunye ne-SBR zine-adhesive, esetyenziswe kwi-slurry, apho i-CMC ibalulekile ngeli xesha, kwaye i-SBR ibalulekile ekudibaniseni. 9.

Uyongeza njani i-NMP kwaye usebenzise xa unikezelo lwamanzi lungalunganga. Ukongeza i-NMP kwi-electrode engalunganga enamanzi kubalulekile ukunyusa ukuxinezeleka komphezulu wefoyile engalunganga, ukwenza itafile eludaka ngakumbi, kunye nokuthintela ukubotshwa kwepulp. Nangona kunjalo, xa ukondla, kufuneka kuqatshelwe ukuba i-SBR kunye ne-NMP ziphezulu ze-molecular organics, ngokukhawuleza okanye ukushisa okuphezulu kunokusabela kwizinto ezimbini, kunye ne-jelly-shaped kunye ne-gases.

I-10, ubudlelwane phakathi kokuqina, i-viscosity kunye neentlobo ze-gel. 11. Bunjani ubushushu be-oveni xa utsala.

I-pulp iphantsi kakhulu ukuthoba i-low-sequence powder, iqondo lokushisa liphezulu kakhulu, i-polar powder ingumgubo, okanye i-crack ebalulekileyo, kwaye kukho ukunyuka. I-12, ubuninzi bee-puls eziqalisiwe azilingani okanye zikhulu. Ubuninzi bomphezulu we-slurry abukwahlulwanga ngokulinganayo kwimiba emininzi: ubuninzi bangaphambili nasemva bephepha le-polar aluhambelani, ukuxinana komphezulu wecala akuhambelani, ukuxubana kwe-polar kubangelwa ngokungalinganiyo ukuba ixesha ledayimani lingahambelani, into ngokwayo ayizinzile, i-mulch surface density ayizinzile okanye incinci kwaye kukho ukuxinana.

13, ukulungisa ingxaki yoxinzelelo lwe-roller. Ngeendlela ezimbini, enye ivela kwi-microstructure yeengqungquthela, okwesibini ivela kwimbonakalo ye-electrode (i-gum, umgubo, imibimbi). 14, ngexesha lenkqubo yokuvelisa nasemva kokuveliswa kwefilimu emva kokuveliswa.

Injongo ye-pole yokubhaka kukususa umswakama, kodwa ukushisa kunye nexesha lilawulwa, kwaye ukushisa kwe-polar yokubhaka kungama-degrees angama-130 ngexesha lokuvelisa, kwaye ukushisa okubhaka kwefilimu ngama-90 degrees. I-15, iimeko zokugcina zepali. Emva kokuba ifilimu igqityiwe, isibonda sigcinwa kwindawo eyomileyo yokutywina.