Nkibikoresho nyamukuru byamazi ashingiye kubikoresho bya electrode mbi, ibicuruzwa bya CMC bikoreshwa cyane nabakora bateri yo murugo no mumahanga. Umubare ntarengwa wa binder urashobora kubona ubushobozi bwa bateri nini, ubuzima bwigihe kirekire kandi birwanya imbere imbere.
Binder ni kimwe mu bikoresho byingenzi bifasha muri bateri ya lithium-ion. Nisoko nyamukuru yimiterere yubukanishi bwa electrode yose kandi igira ingaruka zikomeye mubikorwa byo gukora electrode no gukora amashanyarazi ya batiri. Binder ubwayo nta bushobozi ifite kandi ifite umwanya muto cyane muri bateri.
Usibye imiterere ifatika ya binders rusange, ibikoresho bya lithium-ion ya electrode ihuza ibikoresho nabyo bigomba kuba bishobora kwihanganira kubyimba no kwangirika kwa electrolyte, ndetse no guhangana na ruswa yamashanyarazi mugihe cyo kwishyuza no gusohora. Iguma itekanye mumurongo wa voltage ikora, kubwibyo rero nta bikoresho byinshi bya polymer bishobora gukoreshwa nka binderi ya electrode kuri bateri ya lithium-ion.
Hariho ubwoko butatu bwingenzi bwa batiyeri ya lithium-ion ikoreshwa cyane muri iki gihe: fluoride polyvinylidene (PVDF), emulion ya styrene-butadiene (SBR) na carboxymethyl selulose (CMC). Byongeye kandi, aside polyacrylic (PAA), Amazi ashingiye kumazi hamwe na polyacrylonitrile (PAN) na polyacrylate nkibice byingenzi nabyo bifata isoko runaka.
Ibintu bine biranga urwego rwa bateri CMC
Bitewe n'amazi mabi adashobora gukomera ya acide ya carboxymethyl selulose, kugirango uyikoreshe neza, CMC nikintu gikoreshwa cyane mubikorwa bya batiri.
Nkibikoresho nyamukuru byamazi ashingiye kubikoresho bya electrode mbi, ibicuruzwa bya CMC bikoreshwa cyane nabakora bateri yo murugo no mumahanga. Umubare ntarengwa wa binder urashobora kubona ubushobozi bwa bateri nini, ubuzima bwigihe kirekire kandi birwanya imbere imbere.
Ibintu bine biranga CMC ni:
Ubwa mbere, CMC irashobora gukora ibicuruzwa hydrophilique kandi bigashonga, bigashonga rwose mumazi, nta fibre nubusa.
Icya kabiri, urwego rwo gusimbuza ni rumwe kandi ibishishwa birahagaze, bishobora gutanga ubwiza buhamye no gufatana.
Icya gatatu, kora ibicuruzwa bifite isuku nyinshi bifite ibyuma bike bya ion.
Icya kane, ibicuruzwa bifite aho bihurira na SBR latex nibindi bikoresho.
CMC sodium ya carboxymethyl selulose ikoreshwa muri bateri yazamuye neza uburyo bwo kuyikoresha, kandi mugihe kimwe ikanatanga imikorere myiza yo gukoresha, hamwe ningaruka zikoreshwa.
Uruhare rwa CMC muri bateri
CMC ni carboxymethylated ikomoka kuri selile, ubusanzwe itegurwa no gukora selile karemano hamwe na caustic alkali na acide monochloroacetic, kandi uburemere bwa molekile buri hagati y'ibihumbi na miriyoni.
CMC ni ifu yera yumuhondo yoroheje, granular cyangwa fibrous ibintu, bifite hygroscopique ikomeye kandi byoroshye gushonga mumazi. Iyo idafite aho ibogamiye cyangwa alkaline, igisubizo ni amazi-yuzuye cyane. Niba ashyutswe hejuru ya 80 ℃ igihe kirekire, ibishishwa bizagabanuka kandi ntibishobora gushonga mumazi. Ihinduka umukara iyo ishyutswe kuri 190-205 ° C, na karubone iyo ishyushye kuri 235-248 ° C.
Kubera ko CMC ifite imirimo yo kubyimba, guhuza, gufata amazi, emulisation no guhagarikwa mugisubizo cyamazi, ikoreshwa cyane mubijyanye nubutaka, ibiryo, amavuta yo kwisiga, gucapa no gusiga amarangi, gukora impapuro, imyenda, impuzu, imiti hamwe nubuvuzi, hejuru- amaherezo ya ceramics na bateri ya lithium Umurima uhwanye na 7%, bakunze kwita "inganda monosodium glutamate".
By'umwiharikoCMCmuri bateri, imikorere ya CMC ni: gukwirakwiza ibintu bibi bya electrode ikora kandi ikora; kubyimba no kurwanya ubukana ingaruka mbi ya electrode mbi; gufasha guhuza; guhagarika imikorere yo gutunganya electrode no gufasha kunoza imikorere ya bateri Imikorere; kunoza igishishwa cyigice cya pole, nibindi.
Imikorere ya CMC no guhitamo
Ongeramo CMC mugihe ukora electrode ya elegitoronike irashobora kongera ubwiza bwigituba kandi ikabuza gutembera gutuza. CMC izabora ioni ya sodium na anion mugisubizo cyamazi, kandi ubukonje bwa kole ya CMC buzagabanuka hamwe nubushyuhe bwiyongereye, byoroshye gukuramo ubuhehere kandi bufite ububobere buke.
CMC irashobora kugira uruhare runini mugukwirakwiza amashanyarazi mabi ya electrode. Mugihe ingano ya CMC yiyongera, ibicuruzwa byayo byangirika bizakomeza hejuru yubuso bwa grafite, kandi ibice bya grafite bizasubirana bitewe nimbaraga za electrostatike, bigere ku ngaruka nziza zo gutatanya.
Ingaruka zigaragara za CMC ni uko zoroshye. Niba CMC yose ikoreshwa nka binder, grafite ya elegitoronike ya electrode izasenyuka mugihe cyo gukanda no gukata igice cya pole, bizatera igihombo gikomeye. Muri icyo gihe, CMC yibasiwe cyane nigipimo cyibikoresho bya electrode nagaciro ka pH, kandi urupapuro rwa electrode rushobora gucika mugihe cyo kwishyuza no gusohora, bigira ingaruka kumutekano wa bateri.
Ku ikubitiro, icyuma cyakoreshwaga mu gukurura electrode mbi ni PVDF hamwe n’ibindi bikoresho bishingiye ku mavuta, ariko urebye kurengera ibidukikije n’ibindi bintu, byahindutse inzira nyamukuru yo gukoresha imiyoboro ishingiye ku mazi kuri electrode mbi.
Ihuza ryuzuye ntiribaho, gerageza uhitemo binder yujuje ibyangombwa bitunganyirizwa hamwe nibisabwa n'amashanyarazi. Hamwe nogutezimbere tekinoroji ya batiri ya lithium, hamwe nibiciro hamwe nibibazo byo kurengera ibidukikije, imiyoboro ishingiye kumazi amaherezo izasimbuza amavuta ashingiye kumavuta.
CMC inzira ebyiri zingenzi zo gukora
Dukurikije ibitangazamakuru bitandukanye bya etherification, umusaruro winganda za CMC urashobora kugabanywamo ibyiciro bibiri: uburyo bushingiye kumazi nuburyo bushingiye kumashanyarazi. Uburyo bukoresha amazi nkibisubizo byitwa uburyo bwo gukoresha amazi, bukoreshwa mukubyara alkaline iciriritse na CMC yo mu rwego rwo hasi. Uburyo bwo gukoresha ibishishwa kama nkibisubizo byitwa uburyo bwa solvent, bukwiranye no kubyara CMC yo mu rwego rwo hejuru kandi yo mu rwego rwo hejuru. Izi reaction zombi zikorerwa mumashanyarazi, arizo nzira yo guteka kandi ubu ni bwo buryo nyamukuru bwo gukora CMC.
Uburyo buciriritse bwamazi: inzira yambere yinganda zikora inganda, uburyo nugukora reaction ya alkali selulose na etherification mugihe cya alkali namazi yubusa, bikoreshwa mugutegura ibicuruzwa bya CMC buciriritse kandi buciriritse, nkibikoresho byogeza hamwe nubunini bwimyenda Tegereza . Ibyiza byuburyo buciriritse bwamazi nuko ibikoresho bisabwa byoroshye kandi igiciro ni gito; ibibi ni uko kubera kubura ubwinshi bwamazi aciriritse, ubushyuhe buterwa nigisubizo byongera ubushyuhe kandi byihutisha umuvuduko wibisubizo byuruhande, bikavamo imikorere ya etherifike nkeya hamwe nubuziranenge bwibicuruzwa.
Uburyo bwo gukemura; bizwi kandi nkuburyo bwa organic solvent method, bigabanijwe muburyo bwo guteka hamwe nuburyo bwihuse ukurikije ingano ya reaction diluent. Ikintu nyamukuru kiranga ni uko alkalisation na etherification reaction ikorwa muburyo bwa solge organic nkibisubizo (diluent) bya. Kimwe na reaction yuburyo bwamazi, uburyo bwo gukemura nabwo bugizwe nibyiciro bibiri bya alkalisation na etherification, ariko uburyo bwo kubyitwaramo muribi byiciro byombi buratandukanye. Ibyiza byuburyo bwa solvent nuko bureka inzira yo gushiramo alkali, gukanda, kumenagura, no gusaza bikomoka muburyo bwamazi, kandi alkalisation na etherification byose bikorerwa mukabuto; ibibi ni uko kugenzura ubushyuhe ari muke, kandi umwanya ukenewe ni muke. , igiciro kinini.
Igihe cyo kohereza: Mutarama-05-2023