Ukukhiqizwa okuyisisekelo kanye nezinyathelo zokuphepha zokushaja ibhethri ye-lithium

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Furnizuesi portativ i stacionit të energjisë elektrike

I. Izincazelo zokusebenza kwesistimu yezinto kanye nencazelo yendawo ethile (m2 / g): ibhekisela endaweni engaphezulu yezinhlayiya zeyunithi yesisindo. (Indlela yokuhlola: ukubala ivolumu ye-argon ekhangiswa yimpahla yeyunithi yesisindo).

Usayizi we-particle (μm): Incazelo yezinhlayiya zezinto ezibonakalayo, ibhekisela kububanzi bezinhlayiya zezinto ezibonakalayo. I-D50 ichaza ububanzi bezinhlayiyana ezimaphakathi zezinto. I-Vain Density (G / CM3): Impahla idlidliza isisindo seyunithi yokudlidliza komshini.

Ngaphezu kwalokho, kukhona futhi impahla ngokwayo, uhlobo lokubukeka, umthamo wokukhipha, ukusebenza kahle komthamo, okuqukethwe okungcolile, nokunye okunjalo kuyizingqinamba zokusebenza kwezinto ezihlukahlukene. Okwesibili, izinto ezihlukahlukene e-electrode kanye nezici zayo eziyisisekelo ukusetshenziswa 1, conductive agent carbon inki conductive ejenti, carbon ungakhululekile, izindawo ezinhle conductive, adsorption eqinile, indawo enkulu ethize, mayelana 60-100 m2 / g, Its ngokwalo ayinakho umthamo. Artificial graphite conductive ejenti, the conductivity abampofu kancane kuka inki carbon, kodwa indawo ethize incane, 10-30 mAh / g, okuyinto umthamo, mayelana 290 mAh / g, okuyinto engcono.

Kukhona futhi i-graphite yemvelo, kuye ngokuthi i-conductivity yayo, ingasetshenziswa futhi njenge-agent conductive, kodwa futhi njengento engalungile ye-electrode ngenxa yomthamo omkhulu. Futhi i-nano-scale carbon fiber, conductivity enhle, ukusebenza kahle kokucubungula, kodwa intengo iyabiza. 2, i-electrode material ngokuvamile ibhethri lesibili lithium ion, futhi lithium cobaltate, eyakhe igremu umthamo 135-150 mAh / g, ukuminyana compact kuyinto 3.

I-65-4.00 g / cc, i-LiCoO2 ibhethri ye-ion ye-lithium ene-electrode eqondile inobude be-voltage yesifunda evulekile. Iphakeme kunamandla (i-theoretical than energy 1068Wh / kg, umthamo wethiyori 274mAh / g), impilo yomjikelezo omude, ukukhishwa okusheshayo, kodwa intengo iyabiza.

I-electrode engalungile: i-graphite yokwenziwa, isigaba esimaphakathi se-carbon microsphere, ukuguqulwa kwe-graphite yemvelo, njll. I-graphite yokufakelwa evamile: umthamo wegram 290-310mAh / g, ukuhlanganisa 1.45-1.

55g/c. I-carbon microspheres yesigaba esimaphakathi: umthamo wegram 310-320mAh / g, ukuhlanganisa 1.55-1.

65g/c. Ukuguqulwa kwe-graphite yemvelo: umthamo wegram 320-340mAh / g, i-compact 1.55-1.

65g/c. 3, ingcina ivame ukuduma nge-PVDF, igama lamakhemikhali yi-polyvinylidene fluoride, futhi ubukhulu be-viscosity yayo buthintwa isisindo samangqamuzana, isikhundla seqembu elisebenzayo kanye nenqubo yokucubungula. Ngokuvamile, mayelana nenqubo efanayo yokucubungula, isikhundla esifanayo seqembu elisebenzayo, isisindo esikhulu samangqamuzana, ukuphakama kwe-viscosity yayo, kodwa ngokunyuka kwe-viscosity, ukuhlaliswa kwayo kwe-slurry kuzwakala kakhulu.

I-CMC ne-SBR yiglue esetshenziswa ohlelweni olunamanzi. I-CMC (i-carboxymethylcellulose): i-powder emhlophe noma encane ephuzi, yona ngokwayo inezici zokubopha, kodwa ohlelweni olunamanzi, ukusetshenziswa kwayo okuyisisekelo noma okuhlakazekayo kanye ne-SBR. I-SBR (ubisi lwe-butadous-blene-blewell): uketshezi lwe-emulsion eluhlaza okwesibhakabhaka lwebhande elimhlophe, inhlanganisela ye-polymer, exutshwe ne-CMC, nokusebenza kwayo kokubopha kungcono.

Okwesithathu, ibhethri yenza ukusebenza okuhle ukuze ihlangabezane nezimo eziningana zezinto zokwakha, ukuze isebenze kahle, ingafinyeleli lezi zimo ezilandelayo: 1, isakhiwo ngokwaso, usayizi wezinhlayiyana, ama-granules Ubushelelezi bokubukeka; ukukhishwa okufanayo kwama-molecule asebenzayo ku-electrode; 3, i-molecule esebenzayo kanye ne-ejenti conductive ukuthintana okuhle; 4, qhuba inethiwekhi ngokushelela; 5, kanye ne-electrolyte infiltration degree enhle; 6, ngayinye Izimo inqubo Good for impahla impahla. Okwesine, indlela enyakazayo nokulandelana kwe-1, i-glue i-PVDF: Ngokusho kwe-concentration okufanele icushwe, inani le-PVDF eyomile libhekiselwa kulo, lifake kuhhavini elomile, libhake imizuzu engu-60-120 nge-70-80 degrees, bese libizwa ngokuthi i-NMP Esitsheni sokunamathisela, isitsha silungisiwe, futhi i-PDFV ifaka i-powder eyomile kuze kube yilapho i-PDF eyomile igoqa kuze kube yilapho i-powder eyomile ihlanganiswa. wanezela, isitsha sivalwe uphawu ngangokunokwenzeka, sinyakaziswa 3-4h, kuze kube yilapho sichithwa ngokuphelele, gxuma kancane kancane Seal isikhathi esithile ukuze ususe ama-bubbles ku-rubber noma uthele isisombululo sabo esitsheni esinqunyiwe. Le rabha ilungile, ukugxila kwayo ngokuvamile ku-12%.

I-CMC: Isinyathelo sendlela ngokuyisisekelo siyefana, kodwa uhlelo lwesixazululo lusekelwe emanzini, i-solvent ingamanzi e-deionized kune-NMP, futhi ukugxila kwesixazululo ngokuvamile ku-2-3.5%. 2, izinto zokubala ukuthatha impahla kuhhavini wevacuum amahora angu-4 kuhhavini yevacuum engu-160 degree, bese ugoqa, bese ugoqa, izinyathelo ezijwayelekile zimi kanje: 2.

1 Faka i-conductive agent SP, bese uyimanzisa ngenani elanele le-NMP, futhi Govuza 10-20min. 2.2 Faka amanye ama-conductive agents esinyathelweni sokuqala, gudluza i-10-20 min.

I-2.3 Ukwengeza imikhiqizo esebenzayo kanye ne-gum, ivuselela nge-spoon, bese uyigqugquzela ku-stirrer ngesivinini esikhulu kuze kube yilapho ibhekwa njengebushelelezi futhi iphendukela ku-agitator amahora angu-2, futhi i-slurry iyadingeka ngesivinini esikhulu Ukuxubha okuminyene, ukufeza inhloso yokusabalalisa). 2.

4 Lungisa lube luqinile, gqugquzela kancane kancane imizuzu engama-30 ukuze ukhiphe umusi. 2.5 Khipha i-slurry, isihlungi.

3, izinto ezinyakazayo 3.1 Faka i-SP ye-conductive agent, imanzise ngenani elincane le-NMP, igubungele i-10-20min. 3.

2 Ukwengeza amanye ama-conductive agents, imikhiqizo esebenzayo, kanye ne-CMC kanye nenani elifanele le-H2O, elinyakaziswa nge-spoon, bese linyakaziswa ngesivinini esikhulu ku-stirrer kuze kube yilapho kubonakala ukuthi i-slurry surface ibushelelezi kakhulu, bese ilungiswa ukuze ivuselele kudivayisi engu-1.2-1.5H (lesi sinyathelo sidinga ukujiya ngesivinini esiphezulu ukuze kuzuzwe inhloso yokuhlakazeka).

3.3 Ukwengeza inani elifanele le-H2O esinyathelweni sesibili. 3.

4 Ukwengeza i-SBR eyanele esinyathelweni esiphezulu, ukugqugquzela kuqedwa ngokuphelele ku-SBR, cishe imizuzu engama-30. (Idinga izinga lokushisa eliphansi nesivinini esinensayo uma ungeza i-SBR) 3.5 Engeza okuqukethwe kwamanzi aludaka 10-15% NMP (equkethe i-NMP kanye nesinyathelo 1), gqugquzela ibhamuza kancane, imizuzu engama-30.

3.6 Khipha i-slurry, isihlungi. V.

Izinkinga ezivamile ekuhlolweni, ukuxazulula inkinga futhi kuthinte i-1, inhloso, isikhathi nokushisa kokubhaka. Izinto ze-Electrode: ukususa umswakama, uwoyela nothuli, izimo zokubhaka ngokuvamile ziyi-160 degrees 4h. Glue: I-deflash ebalulekile, izimo zokubhaka ngokuvamile 70-80 degrees bhaka 60-120min.

I-Oxic acid: ngaphezu komswakama kanye namanzi acwebile, izimo zokubhaka ngokuvamile ziyi-70-80 degrees for 30-60 min. 2, umgomo wokusetshenziswa kwama-conductive agents. Ama-conductor avame ukuxutshwa, kusetshenziswa indlela yokukhipha.

3. Umthelela we-conductive agent eyengezwe ebhethrini. Ama-conductor anomthamo othintekile kancane, umjikelezo, iplatifomu, izakhiwo zokukhipha izinga lokushisa eliphezulu neliphansi kanye nokukhishwa kwamanje okuphezulu, ukusebenza kokuphepha, ukumelana kwangaphakathi, njll.

4, umehluko ohlelweni lokwengezwa kwezithako kanye nezinzuzo kanye nokubi. I-conductant ne-adhesive yengeza ukulandelana, i-oxalic acid ingeza ukulandelana, i-NMP yengeza ukulandelana kwezinto ezinamanzi, njll. 5, glue kanye nethonya elincane ekusebenzeni kwebhethri.

6. Uyini umthelela wokupholisa ngokushesha ngesikhathi sezithako. 7.

Indlela yokuhambisa kanye nokwengezwa kanye nenani le-oxalic acid ekucushweni okunegethivu okunamafutha kanye ne-oxalic acid. Kunezinjongo ezimbili zokushisisa ngegesi: susa ungqimba lwe-oxide engaphezulu kwecwecwe lethusi bese wenza umsele ogqwalayo ebusweni be-foil yethusi, bese ufafaza i-slurry kucwecwe lethusi. Ukusetshenziswa kwayo ngokuvamile kungu-2% we-PVDF.

8, CMC, SBR Use and Precautions in Waterborne. Kokubili i-CMC ne-SBR zinokunamathela, ezisetshenziswa ku-slurry, lapho i-CMC ibalulekile ngalesi sikhathi, futhi i-SBR ibalulekile ekuhlanganiseni. 9.

Uyengeza kanjani i-NMP futhi uyisebenzise lapho ukusatshalaliswa kwamanzi kungalungile. Ukwengeza i-NMP ku-electrode engemihle enamanzi kubalulekile ukukhulisa ukushuba kwendawo ye-foil engalungile, ukwenza ithebula le-slurry libe bushelelezi kakhulu, nokuvimbela ukuboshwa kwe-pulp. Kodwa-ke, lapho udla, kufanele kuqashelwe ukuthi i-SBR ne-NMP yizinto eziphilayo eziphezulu zamangqamuzana, amazinga okushisa asheshayo noma aphezulu angasabela ezintweni ezimbili, futhi amise okwe-jelly futhi ahambisana namagesi.

10, ubudlelwano phakathi kwezinhlobo eziqinile, i-viscosity kanye nejeli. 11. Linjani izinga lokushisa likahhavini uma udonsa.

I-pulp iphansi kakhulu ukwehlisa i-powder elandelanayo ephansi, izinga lokushisa liphezulu kakhulu, i-polar powder iyimpushana, noma ukuqhekeka okuphawulekayo, futhi kukhona ukukhuphuka. 12, ukuminyana kwe-puls eyethulwe ayilingani noma inkulu. I-slurry surface density ayihlukaniswanga ngokulinganayo ibe yizici eziningana: ukuminyana kwangaphambili nangemuva kweshidi le-polar akuhambisani, ukuminyana kobuso obuseceleni okubili akuhambisani, ukuxubana kwe-polar kubangelwa ngokungalingani ukuthi isikhathi sedayimane singahambisani, into ngokwayo ayizinzile, ukuminyana kwe-mulch ebusweni akuzinzile noma kuncane futhi kukhona ukuminyana.

13, ukulungisa iphutha lokucindezela kwe-roller. Ngezindlela ezimbili, eyodwa ivela ku-microstructure yezinhlayiya, okwesibili kuvela ekubukeni kwe-electrode (i-gum, ufulawa, imibimbi). 14, phakathi nenqubo yokukhiqiza nangemva kokukhiqizwa kwefilimu ngemva kokukhiqizwa.

Inhloso yokubhaka isigxobo ukukhipha umswakama, kodwa izinga lokushisa nesikhathi kulawulwa, futhi izinga lokushisa lokubhaka le-polar liyi-130 degrees ngesikhathi sokukhiqiza, futhi izinga lokushisa elibhakabhaka lefilimu liyi-90 degrees. 15, izimo zokugcina isigxobo. Ngemuva kokuthi ifilimu isiqediwe, isigxobo sigcinwa endaweni eyomile yokuvala uphawu.