CMC ikoresha mu nganda za Batiri

Sodium carboxymethyl selile?

Sodium Carboxymethyl selulose, (nanone yitwa: Carboxymethyl selulose umunyu wa sodium, Carboxymethyl selulose, CMC, Carboxymethyl, CelluloseSodium, SodiumsaltofCaboxyMethylCellulose) nubwoko bukoreshwa cyane kwisi ya fibre, dosiye ntarengwa.

Cmc-na ni selile ikomoka kuri selile ya dogere 100 ~ 2000 hamwe nuburemere bwa molekile ya 242.16. Ifu yera cyangwa ifu ya granular. Impumuro nziza, uburyohe, uburyohe, hygroscopique, idashonga mumashanyarazi. Uru rupapuro cyane cyane kugirango rwumve ikoreshwa rya sodium carboxymethyl selulose muri batiri ya lithium ion.

Iterambere mugukoresha Sodium carboxymethyl selulose CMCmuri bateri ya lithium

Kugeza ubu, fluoride polyvinylidene [pVDF, (CH: A CF :)] ikoreshwa cyane nka binder mugukora bateri ya lithium. . PVDF ntabwo ihenze gusa, ikeneye no gukoreshwa mugikorwa cyo gukoresha ibisasu biturika, byangiza ibidukikije byumuti ukomoka ku bimera, nka N methyl ibyo ketone ya alkane (NMp) hamwe nubushuhe bwikirere kugirango bikore neza, byoroshye kandi byashyizwemo icyuma cya lithium, lithium grafite reaction ya kabiri, cyane cyane mubihe byubushyuhe bwo hejuru, ibyago byizana byo guhunga ubushyuhe. Sodium carboxymethyl selulose (CMC), ihuza amazi ashonga, ikoreshwa mugusimbuza pVDF ibikoresho bya electrode, bishobora kwirinda ikoreshwa rya NMp, kugabanya ibiciro no kugabanya kwanduza ibidukikije. Muri icyo gihe, inzira yo kubyaza umusaruro ntabwo isaba ubushuhe bwibidukikije, ariko kandi irashobora kuzamura ubushobozi bwa bateri, ikongerera igihe cyizuba. Muri iyi nyandiko, hasuzumwe uruhare rwa CMC mu mikorere ya batiri ya lithium ion, kandi uburyo bwa CMC bwo kunoza imikorere ya batiri bwavuzwe mu ncamake uhereye ku bijyanye n’ubushyuhe bw’umuriro, amashanyarazi ndetse n’ibiranga amashanyarazi.

1. Imiterere n'imikorere ya CMC

1) Imiterere ya CMC

Ubusanzwe CMC ishyirwa mubyiciro bitandukanye byo gusimbuza (Ds), kandi ibicuruzwa morphologie nibikorwa bigira ingaruka cyane kuri Ds. LXie n'abandi. yize CMC hamwe na Ds zitandukanye H ebyiri za Na. Ibisubizo by'isesengura rya SEM byerekanye ko CMC-Li-1 (Ds = 1.00) yerekanye imiterere ya granular, naho CMC-Li-2 (Ds = 0.62) yerekanye imiterere y'umurongo. Ubushakashatsi bwa M. E nabandi bwerekanye ko CMC. Ribber ya styrene butadiene (SBR) irashobora kubuza agglomeration ya Li: O kandi igahindura imiterere yimbere, ifitiye akamaro amashanyarazi.

2) imikorere ya CMC

2.1)Ubushyuhe bukabije

Zj Han n'abandi. yize ituze ryumuriro wa binders zitandukanye. Ubushyuhe bukomeye bwa pVDF ni 4500C. Iyo ugeze kuri 500 ℃, kubora byihuse bibaho kandi misa igabanukaho 70%. Iyo ubushyuhe bugeze kuri 600 ℃, misa yarushijeho kugabanuka 70%. Ubushyuhe bumaze kugera kuri 300oC, ubwinshi bwa CMC-Li bwagabanutseho 70%. Iyo ubushyuhe bugeze kuri 400 ℃, ubwinshi bwa CMC-Li bwagabanutseho 10%. CMCLi irashobora kubora byoroshye kuruta pVDF nyuma yubuzima bwa bateri.

2.2)Amashanyarazi

S. Chou n'abandi. ibisubizo by'ibizamini byagaragaje ko kurwanya CMCLI-1, CMC-Li-2 na pVDF byari 0.3154 Mn · m na 0.2634 Mn. M na 20.0365 Mn · m, byerekana ko kurwanya pVDF biruta ibya CMCLi, imiyoboro ya CMC-LI iruta iya pVDF, kandi na CMCLI.1 ikaba munsi ya CMCLI.2.

2.3)Imashanyarazi

FM Courtel n'abandi. yize cyclic voltammetry umurongo wa poly-sulfonate (AQ) ishingiye kuri electrode mugihe binderswere zitandukanye. Binders zitandukanye zifite okiside zitandukanye no kugabanya reaction, bityo ubushobozi bwo hejuru buratandukanye. Muri byo, ubushobozi bwa okiside ya CMCLi ni 2.15V, naho ubushobozi bwo kugabanya ni 2.55V. Ubushobozi bwa okiside no kugabanya ubushobozi bwa pVDF bwari 2.605 V na 1.950 V. Ugereranije nu murongo wa cyclic voltammetry wikubye inshuro ebyiri zabanjirije iyi, itandukaniro rishobora kuba impanuro yo kugabanya okiside-kugabanya igihe imashini ya CMCLi yakoreshwaga yari ntoya ugereranije nigihe pVDF yakoreshwaga, byerekana ko reaction itigeze ibangamirwa kandi guhuza CMCLi byari byiza cyane kubaho kwa okiside-kugabanya reaction.

2. Ingaruka zo gusaba hamwe nuburyo bwa CMC

1) Ingaruka zo gusaba

Pj Suo n'abandi. yize imikorere yamashanyarazi yibikoresho bya Si / C mugihe ibikoresho bya pVDF na CMC byakoreshwaga nka binders, ugasanga bateri ikoresha CMC yari ifite ubushobozi budasanzwe bwa 700mAh / g kunshuro yambere kandi iracyafite 597mAh / g nyuma yizunguruka 4O, aribyo yarutaga bateri ukoresheje pVDF. Jh Lee n'abandi. yize ku ruhare rwa Ds ya CMC ku ihagarikwa rya grafite ihagarikwa kandi yizera ko ubwiza bw’amazi bwo guhagarikwa bwagenwe na Ds. Kuri DS nkeya, CMC ifite hydrophobique ikomeye, kandi irashobora kongera reaction hamwe nubuso bwa grafite mugihe amazi akoreshwa mubitangazamakuru. CMC ifite kandi inyungu mu kubungabunga ituze ryimiterere ya silicon - tin alloy anode ibikoresho. Ni electrode ya NiO yateguwe hamwe nubushakashatsi butandukanye (0.1mouL, 0.3mol / L na 0.5mol / L) CMC hamwe na pVDF, hanyuma bishyuzwa kandi bisohoka kuri 1.5-3.5V hamwe numuyoboro wa 0.1c. Mugihe cyambere, ubushobozi bwa selile ya pVDF yari hejuru kurenza iyo selile ya CMC. Iyo umubare wizunguruka ugeze lO, ubushobozi bwo gusohora pVDF binder bugabanuka bigaragara. Nyuma yizunguruka ya 4JD, ubushobozi bwihariye bwo gusohora bwa 0.1movL, 0.3MOUL na 0.5MovLPVDF bunders bwaragabanutse kugera kuri 250mAh / g, 157mAtv 'g na 102mAh / g, kimwe: Gusohora ubushobozi bwihariye bwa bateri hamwe na 0.1 moL / L, 0.3 moL / L na 0.5 moL / LCMC binder yabitswe kuri 698mAh / g, 555mAh / g na 550mAh / g.

Binder ya CMC ikoreshwa kuri LiTI0. : na SnO2 nanoparticles mubikorwa byinganda. Ukoresheje CMC nka binder, LiFepO4 na Li4TI50l2 nkibikoresho byiza kandi bibi, kimwe, no gukoresha pYR14FS1 nka flame retardant electrolyte, bateri yazengurutswe inshuro 150 kumuyoboro wa 0.1c kuri 1.5v ~ 3.5V mubushyuhe, nibyiza byihariye ubushobozi bwagumishijwe kuri 140mAh / g. Mu myunyu itandukanye yicyuma muri CMC, CMCLi itangiza izindi ion zicyuma, zishobora kubuza "guhana reaction (vii)" muri electrolyte mugihe cyo kuzenguruka.

2) Uburyo bwo kunoza imikorere

CMC Li binder irashobora kunoza imikorere yamashanyarazi ya AQ base electrode muri bateri ya lithium. M. E n'abandi. -4 yakoze ubushakashatsi bwibanze kuri ubwo buryo anasaba icyitegererezo cyo gukwirakwiza CMC-Li muri electrode ya AQ. Imikorere myiza ya CMCLi ituruka ku ngaruka zikomeye zo guhuza hydrogène yakozwe na OH, igira uruhare mu gushiraho neza imiterere ya mesh. Hydrophilique CMC-Li ntizashonga muri electrolyte kama, bityo ikagira ituze ryiza muri bateri, kandi ikomera cyane kumiterere ya electrode, bigatuma bateri ifite ituze ryiza. Cmc-li binder ifite Li nziza neza kuko hariho umubare munini wamatsinda akora kumurongo wa molekile ya CMC-Li. Mugihe cyo gusohora, hari amasoko abiri yibintu bifatika bikorana na Li: (1) Li muri electrolyte; (2) Li kumurongo wa molekuline ya CMC-Li hafi yikigo cyiza cyibintu bikora.

Imyitwarire yitsinda rya hydroxyl hamwe nitsinda rya hydroxyl muri carboxymethyl CMC-Li binder bizakora covalent bond; Mubikorwa byingufu zamashanyarazi, U irashobora kwimura kumurongo wa molekile cyangwa urunigi rwegeranye, ni ukuvuga imiterere yiminyururu ntizangirika; Amaherezo, Lj izahuza na AQ agace. Ibi byerekana ko ikoreshwa rya CMCLi ridatezimbere gusa ihererekanyabubasha rya Li, ahubwo rinazamura igipimo cyimikoreshereze ya AQ. Iyo hejuru yibiri muri cH: COOLi na 10Li mumurongo wa molekile, byoroshye kwimura Li. M. Arrmand n'abandi. yizeraga ko ibinyabuzima bya -COOH cyangwa OH bishobora kwitwara hamwe na Li 1 hanyuma bigatanga 1 C00Li cyangwa 1 0Li kubushobozi buke. Kugirango turusheho gucukumbura uburyo bwa CMCLi binder muri electrode, CMC-Li-1 yakoreshejwe nkibikoresho bifatika kandi habonetse imyanzuro isa. Li yitwara hamwe na cH imwe, COOH na 0H imwe ya CMC Li ikabyara cH: COOLi na 0 0 "nkuko bigaragara muburinganire (1) na (2)

Nkuko umubare wa cH, COOLi, na OLi wiyongera, DS ya CMC-Li iriyongera. Ibi birerekana ko urwego kama rugizwe ahanini na AQ ibice byubuso bihuza bigenda bihinduka kandi byoroshye kwimura Li. CMCLi ni polymer ikora itanga inzira yo gutwara Li kugirango igere hejuru ya AQ ibice. Imashini ya CMCLi ifite uburyo bwiza bwa elegitoroniki na ionic, ibyo bigatuma imikorere myiza yamashanyarazi nubuzima burebure bwa electrode ya CMCLi. JS Bridel n'abandi. yateguye anode ya batiri ya lithium ion akoresheje ibikoresho bya silicon / carbone / polymer yibikoresho hamwe na binders zitandukanye kugirango yige ingaruka zimikoranire hagati ya silicon na polymer kumikorere rusange ya bateri, ugasanga CMC yagize imikorere myiza mugihe ikoreshwa nka binder. Hariho isano ikomeye ya hydrogène hagati ya silicon na CMC, ifite ubushobozi bwo kwikiza kandi irashobora guhindura imihangayiko yiyongera yibikoresho mugihe cyamagare kugirango igumane ituze ryimiterere yibintu. Hamwe na CMC nka binder, ubushobozi bwa anode ya silicon irashobora kubikwa hejuru ya 1000mAh / g byibuze inzinguzingo 100, kandi imikorere ya coulomb igera kuri 99.9%.

3, umwanzuro

Nka binder, ibikoresho bya CMC birashobora gukoreshwa muburyo butandukanye bwibikoresho bya electrode nka grafite karemano, meso-fase ya karubone microsperes (MCMB), lithium titanate, amabati ashingiye kuri silicon ishingiye kuri anode nibikoresho bya lithium fer fosifate anode, bishobora guteza imbere bateri ubushobozi, ukuzenguruka kwinzira nubuzima bwikigereranyo ugereranije na pYDF. Ningirakamaro kumashanyarazi yumuriro, amashanyarazi nu mashanyarazi yibikoresho bya CMC. Hariho uburyo bubiri bwingenzi bwa CMC kunoza imikorere ya bateri ya lithium:

(1) Imikorere ihamye ya CMC itanga ibisabwa bya ngombwa kugirango tubone imikorere ya bateri ihamye;

(2) CMC ifite electron nziza na ion kandi irashobora guteza imbere ihererekanyabubasha