Ukusetshenziswa kwe-CMC Binder kumabhethri

Njengombhalo ophambili wezinto ezingezinhle ze-elektrode ezingenamanzi, imikhiqizo ye-CMC isetshenziswa kabanzi ngabakhiqizi bebhethri basekhaya nakwamanye amazwe. Inani elifanele le-Binder lingathola umthamo omkhulu webhethri, impilo ende yomjikelezo kanye nokumelana okuphansi okuphansi.

I-Binder ingenye yezinto ezibalulekile ezisebenzayo ezisebenzayo kumabhethri e-lithium-ion. Kungumthombo oyinhloko wezindawo zemishini yalo lonke i-electrode futhi unomthelela obalulekile kwinqubo yokukhiqiza ye-electrode kanye nokusebenza kwe-electrochemical yebhethri. I-BITERSE ngokwayo ayinawo amandla futhi inengxenye encane kakhulu ebhethri.

Ngaphezu kwezindawo ezinamathela ezinama-linder ajwayelekile, izinto ze-lithium-ion zebhethri le-electrode ye-electrode futhi zidinga ukukwazi ukumelana nokuvuvukala nokugqwala kwe-electrolyte, kanye nokuvuka kwe-electrochemical ngesikhathi sokushaja nokukhipha. Ihlala iqinile ebangeni elisebenzayo le-voltage, ngakho-ke azikho izinto eziningi ze-polymer ezingasetshenziswa njengama-electrode amabhethri amabhethri e-lithium-ion.

Kunezinhlobo ezintathu eziphambili ze-Lithium-Ion Battery Binders asetshenziswa kabanzi njengamanje: I-Polyvinylidene Fluoride (PVDF), i-styrene-buthadiene rubber (SBC) emulsose kanye ne-carboxymethyl cellulose (CMC). Ngaphezu kwalokho, i-polyacrylic acid (i-PAA), ama-lindiers asuselwa emanzini ane-polyyacrylonitritria (Pan) ne-polycrylate njengezakhi eziyinhloko futhi zihlala emakethe ethile.

Izici ezine ze-CMC yebhethri

Ngenxa ye-solubility yamanzi ampofu yesakhiwo se-acid ye-carboxymethyl cellulose, ukuze uyisebenzise kangcono, i-CMC iyinto esetshenziswa kabanzi kakhulu ekukhiqizweni kwebhethri.

Njengombhalo ophambili wezinto ezingezinhle ze-elektrode ezingenamanzi, imikhiqizo ye-CMC isetshenziswa kabanzi ngabakhiqizi bebhethri basekhaya nakwamanye amazwe. Inani elifanele le-Binder lingathola umthamo omkhulu webhethri, impilo ende yomjikelezo kanye nokumelana okuphansi okuphansi.

Izici ezine ze-CMC yilezi:

Okokuqala, i-CMC ingenza umkhiqizo we-hydrophilic futhi incibilike, incibilike ngokuphelele emanzini, ngaphandle kwemicu yamahhala nokungcola.

Okwesibili, izinga lokufaka esikhundleni semfaniswano futhi i-viscosity lizinzile, elinganikeza ukuhlakanipha okuzinzile nokunamathelisa.

Okwesithathu, khiqiza imikhiqizo yokuhlanza okuphezulu nge-Int yensimbi ephansi.

Okwesine, umkhiqizo unokuhambisana okuhle nge-SBR Latex nezinye izinto.

I-CMC sodium carboxymelyl celtulose esetshenziswe ebhethri ithuthukise kahle umphumela wayo wokusebenzisa, futhi ngasikhathi sinye ikunikeza ukusebenza okuhle kokusebenzisa, ngomphumela wokusetshenziswa kwamanje.

Indima ye-CMC kumabhethri

I-CMC ingukutholwa kwebhokisi le-cartule

I-CMC imhlophe ukukhanyisa i-powder ephuzi, into e-granular noma ye-fibrous, enenhlathiso eqinile futhi iyancibilika kalula emanzini. Uma kungathathi hlangothi noma i-Alkali, ikhambi liwuketshezi oluphezulu lwe-viscosity. Uma kufuthelwa ngenhla kwe-80 ℃ isikhathi eside, i-visa siyokwehla futhi izokwehla emanzini. Kuphenduka nsundu lapho kufuthelwa ngo-190-205 ° C, kanye nama-carbonis lapho kufuthelwa ku-235-248 ° C.

Ngoba i-CMC inemisebenzi yokuqina, ukubopha, ukugcinwa kwamanzi, ukugcinwa kwamanzi, ukumiswa kwesisombululo samanzi, kusetshenziswa kabanzi emikhakheni yamanzi, kusetshenziswa amabhethri we-lithium ama-glutamate ".

Ngokuqondile ebhethri, imisebenzi ye-CMC yilena: Ukusabalalisa i-electrode esebenzayo esebenzayo ne-ejenti esebenzayo; Ukuqina nokulwa nokulwa nokufundwa kwamandla ku-slurry ye-elektrode elibi; ukusiza ukubopha izibopho; Ukuzinza ukusebenza kwe-electrode nokusiza ukuthuthukisa ukusebenza komjikelezo webhethri; Thuthukisa amandla we-PEEE we-Pole Piet, njll.

Ukusebenza kwe-CMC nokukhethwa

Ukungeza i-CMC lapho wenza i-shurry ye-electrode ingakhulisa ukubonakala kwe-slurry futhi ivikele ukushibilika ekuxazululeni. I-CMC izowathoba ama-sodium ion kanye no-anions kusisombululo esinamanzi, futhi ukubonwa kwe-CMC glue kuzokwehla ngokunyuka kwamazinga okushisa, okulula ukudonsa umswakama futhi kunobunzima obubi.

I-CMC ingadlala indima enhle kakhulu ekusakazweni kwegrafu ye-elektrodi engemihle. Njengoba inani le-CMC lenyuka, imikhiqizo yayo yokuvusa izonamathela ebusweni bezinhlayiya ze-graphite, futhi izinhlayiya ze-graphite zizoxosha omunye ngomunye ngenxa yamandla akwa-electrostatic, ethola umphumela omuhle wokuhlakazeka.

Ububi obusobala be-CMC ukuthi kuncane. Uma wonke ama-CMC esetshenziswa njenge-binder, i-graphite electrode engemihle ye-graphite izowa ngesikhathi senqubo yokucindezela nokusika kwesiqeshana se-pole, esizodala ukulahleka kwempuphu okukhulu. Ngasikhathi sinye, i-CMC ithintwe kakhulu yisilinganiso sezinto zokwenziwa nge-electrode nenani le-PH, nephepha le-electrode lingaqhekeka ngesikhathi sokushaja nokukhipha okuthinta ngokuqondile ukuphepha kwebhethri.

Ekuqaleni, i-Binter esetshenziselwa ukushukumisa ama-elektrodi amabi kwakuyi-PVDF namanye ama-linder asuselwa kuwoyela, kepha kucatshangelwa ukuvikelwa kwemvelo kanye nezinye izinto, sekuyinto ejwayelekile yokusebenzisa ama-linder asuselwa emanzini ama-electrodes amabi.

I-Binder Ephelele ayikho, zama ukukhetha i-Binder ehlangabezana nezidingo zokucubungula kanye nezidingo ze-electrochemical. Ngokuthuthukiswa kobuchwepheshe bebhethri le-lithium, kanye nezingqinamba nezingqinamba zemvelo zokuvikela ezemvelo, ama-linder asuselwa emanzini ekugcineni azogcina athathe isikhundla sokususelwa kumafutha.

CMC izinqubo ezimbili ezinkulu zokukhiqiza

Ngokusho kwemithombo ye-etherization ehlukene, ukukhiqizwa kwezimboni kwe-CMC kungahlukaniswa ngezigaba ezimbili: indlela esekwe emanzini kanye nendlela esekwe e-solvent. Indlela esebenzisa amanzi njengoba i-reaction medium ibizwa ngokuthi yindlela yamanzi, esetshenziselwa ukukhiqiza i-ALkalaline Medium and Light-grade CMC. Indlela yokusebenzisa i-organic solvent njengoba i-Medial Medium ibizwa ngokuthi yi-solvent indlela, efanelekile ukukhiqizwa kwe-CMC ephakathi nebanga lebanga eliphakeme. Lokhu kusabela okubili kwenziwa ku-KINESTERS, okungokwenqubo yokudonsa futhi okwamanje kuyindlela esemqoka yokukhiqiza i-CMC.

Indlela Yamanzi Ephakathi: Inqubo yokukhiqiza yezimboni yangaphambilini, indlela yokuphendula i-Alkali Cellulose kanye ne-Ejenti ye-Agent ngaphansi kwezimo zama-alkali namanzi, asetshenziselwa ukulungiselela imikhiqizo ye-CMC ephakathi nendawo, efana nama-detegents kanye nama-ejenti wokuhlanza izindwangu. Inzuzo yendlela yamanzi aphakathi ukuthi izidingo zemishini zilula futhi izindleko ziphansi; Okubi ukuthi ngenxa yokuntuleka kwenani elikhulu le-liquid medium, ukushisa okukhiqizwe ukusabela kwandisa izinga lokushisa futhi kusheshise ijubane lokuphendula okuphansi, okuholela ekusebenzeni kahle komkhiqizo kanye nekhwalithi yomkhiqizo ongemuhle.

Indlela ye-Solvent; Yaziwa nangokuthi indlela ye-organic solvent indlela, ihlukaniswe ngendlela yokuxova kanye nendlela ebabazekayo ngokuya ngenani le-dillount yokusabela. Isici salo esikhulu ukuthi i-alkalization kanye nokusabela kokuthezeka kwenziwa ngaphansi kwesimo se-organic solvent njenge-reaction medium (diliunt) ye. Njengenqubo yokuphendula yendlela yamanzi, indlela ye-solvent nayo iqukethe izigaba ezimbili ze-alkalization kanye nokuthezeka, kepha okuphakathi kwalezi zigaba ezimbili kwehlukile. Ithuba lendlela ye-solvent ukuthi lishiya izinqubo ze-Alkali zifakwe, zicindezela, zichoboze, kanye nokuguga kwemvelo ngendlela yamanzi, kanye ne-alkalization kanye ne-etherization konke kwenziwa ku-KINESTER; Okubi ukuthi ukulawulwa kwezinga lokushisa kumpofu kakhulu, futhi izidingo zesikhala zimpofu. , izindleko eziphakeme.