CMC waxay ku isticmaashaa Warshadaha Battery

Waa maxay sodium carboxymethyl cellulose?

Sodium Carboxymethyl cellulose, (sidoo kale loo yaqaan: Carboxymethyl cellulose sodium salt, Carboxymethyl cellulose, CMC, Carboxymethyl, CelluloseSodium, SodiumsaltofCaboxyMethylCellulose) waa noocyada ugu isticmaalka badan adduunka ee fiber, qiyaasta ugu badan.

Cmc-na waa derivative cellulose leh darajo polymerization ah 100 ~ 2000 iyo miisaanka kelli ee 242.16.Budada suufka cad ama granular.Aan ur lahayn, aan dhadhamin, aan dhadhamin, hygroscopic, aan lagu milmin dareerayaasha organic.Warqadan inta badan si loo fahmo codsiga sodium carboxymethyl cellulose ee faahfaahinta baytariyada lithium ion.

Horumarka codsiga Sodium carboxymethyl cellulose CMCee baytariyada lithium ion

Waqtigan xaadirka ah, polyvinylidene fluoride [pVDF, (CH: A CF:)] waxaa si weyn loogu isticmaalaa soo saarista baytariyada lithium ion..PVDF ma aha oo kaliya qaali, sidoo kale waxay u baahan tahay in la isticmaalo habka codsiga ee walxaha qarxa, saaxiibtinimo deegaanka ee dareerayaasha organic, sida N methyl kaas oo ketone alkane (NMp) iyo shuruudaha qoyaanka hawada ee habka wax soo saarka si adag, sidoo kale si fudud ula gundhig. Lithium bir ah, falcelinta labaad ee garaafiga lithium, gaar ahaan xaalada heerkulka sare, khatarta kediska ah ee kuleylka kuleylka.Sodium carboxymethyl cellulose (CMC), binder biyo-milmi leh, waxaa loo isticmaalaa beddelka pVDF ee qalabka electrode, taas oo ka fogaan kartaa isticmaalka NMp, yaraynaysaa kharashyada iyo yaraynta wasakh deegaanka.Isla mar ahaantaana, habka wax-soo-saarka uma baahna qoyaan deegaanka, laakiin sidoo kale wuxuu hagaajin karaa awoodda batteriga, wuxuu dheereeyaa nolosha wareegga.Warqadan, doorka CMC ee waxqabadka batteriga lithium ion ayaa dib loo eegay, iyo habka CMC ee hagaajinta waxqabadka batteriga ayaa lagu soo koobay dhinacyada xasilloonida kuleylka, dhaqdhaqaaqa korantada iyo sifooyinka korantada.

1. Qaab dhismeedka iyo waxqabadka CMC

1) Qaabdhismeedka CMC

CMC waxaa guud ahaan lagu kala saaray heerar kala duwan oo beddel ah (Ds), iyo qaab-dhismeedka badeecada iyo waxqabadka waxaa si weyn u saameeya Ds.LXie iyo al.waxa uu CMC ku bartay D-yada H-ga kala duwan ee Na.Natiijooyinka falanqaynta SEM waxay muujisay in CMC-Li-1 (Ds = 1.00) ay soo bandhigtay qaab-dhismeedka granular, iyo CMC-Li-2 (Ds = 0.62) waxay soo bandhigtay qaab-dhismeedka toosan.Cilmi-baarista M. E et al waxay caddeeyeen in CMC.Styrene butadiene rubber (SBR) waxay joojin kartaa agglomeration of Li: O waxayna dejin kartaa qaabdhismeedka isdhexgalka, taas oo faa'iido u leh waxqabadka korantada.

2) Waxqabadka CMC

2.1)Deganaanshaha kulaylka

Zj Han iyo al.bartay xasiloonida kulaylka ee binders kala duwan.Heerkulka muhiimka ah ee pVDF waa qiyaastii 4500C.Marka la gaaro 500 ℃, burburka degdega ah ayaa yimaada oo tirada ayaa la dhimay ilaa 70%.Markii heerkulku gaadhay 600 ℃, tirada ayaa la sii yareeyay 70%.Markii heerkulku gaadhay 300oC, tirada CMC-Li waxaa la dhimay 70%.Markii heerkulku gaadhay 400℃, tirada CMC-Li waxaa la dhimay 10%.CMLi si fudud ayuu u qurmay marka loo eego pVDF dhamaadka nolosha batteriga.

2.2)Dhaqdhaqaaqa korantada

S. Chou iyo al.Natiijooyinka tijaabada ayaa muujiyay in iska caabbinta CMCLI-1, CMC-Li-2 iyo pVDF ay ahaayeen 0.3154 Mn·m iyo 0.2634 Mn, siday u kala horreeyaan.M iyo 20.0365 Mn·m, taas oo muujinaysa in iska caabbinta pVDF ay ka sarreyso kan CMLi, socodka CMC-LI ayaa ka fiican kan pVDF, iyo socodka CMCLI.1 ayaa ka hooseeya kan CMCLI.2.

2.3)Waxqabadka korantada

FM Courtel iyo al.waxa uu bartay qalooca voltammetry meertada ee poly-sulfonate (AQ) electrodes ku salaysan markii la istcimaali jiray xidhayaasha kala duwan.Xirayaasha kala duwan waxay leeyihiin falcelin oksaydhyo iyo dhimis kala duwan, sidaas awgeed awoodda ugu sarreysa ayaa ka duwan.Waxaa ka mid ah, awoodda oksaydhka ee CMLi waa 2.15V, iyo awoodda dhimista waa 2.55V.Awoodda oksaydhka iyo dhimista awoodda pVDF waxay ahaayeen 2.605 V iyo 1.950 V siday u kala horreeyaan.Marka la barbar dhigo qalloocyada voltammetry-ga wareeg ee labadii jeer ee hore, farqiga ugu sarreeya ee suurtagalka ah ee hoos u dhigista oksaydhka marka CMCLi la isticmaalay ayaa ka yaraa tii markii pVDF la isticmaalay, taas oo muujinaysa in falcelintu ay yaraatay caqabado iyo xidhidhka CMLi uu aad ugu habboonaa dhacdada falcelinta dhimista oksaydhka.

2. Saamaynta codsiga iyo habka CMC

1) Saamaynta codsiga

Pj Suo iyo al.ayaa daraasad ku sameeyay waxqabadka korantada ee walxaha isku dhafan ee Si / C markii pVDF iyo CMC loo isticmaalay sidii isku-xireyaasha, waxayna ogaadeen in baytariga isticmaalaya CMC uu lahaa awood gaar ah oo la beddeli karo oo ah 700mAh / g markii ugu horreysay oo uu weli haysto 597mAh / g ka dib wareegyada 4O, kaas oo wuxuu ka sarreeyaa batteriga iyadoo la adeegsanayo pVDF.Jh Lee iyo al.dersay saamaynta Ds ee CMC ee xasiloonida joojinta garaafyada oo la rumaysnaa in tayada dareeraha ah ee joojinta ay go'aamisay Ds.DS hoose, CMC waxay leedahay sifooyin hydrophobic xoog leh, waxayna kordhin kartaa falcelinta dusha garaafka marka biyaha loo isticmaalo warbaahinta ahaan.CMC waxa kale oo ay leedahay faa'iidooyin lagu ilaalinayo xasilloonida sifooyinka meertada ee silikoon - tin alloy anode.Electrodes-ka NiO waxaa lagu diyaariyay xaddi kala duwan (0.1mouL, 0.3mol/L iyo 0.5mol/L) CMC iyo pVDF binder, waxaana lagu dallacay lagana saaray 1.5-3.5V iyadoo hadda ah 0.1c.Inta lagu guda jiro wareegga koowaad, awoodda unugga xiraha pVDF ayaa ka sarreeyay midka CMC ee unugga xiraha.Marka tirada wareegyada ay gaarto lO, awoodda soo saarista ee xiraha pVDF ayaa si cad hoos u dhaceysa.Wareegyada 4JD ka dib, awoodaha dheecaanka gaarka ah ee 0.1movL, 0.3MOUL iyo 0.5MovLPVDF xidhayaasha ayaa hoos u dhacay 250mAh/g, 157mAtv 'g iyo 102mAh/g, siday u kala horreeyaan: Soo daynta awoodaha gaarka ah ee baytariyada leh 0.1 moL/L/0.0. iyo 0.5 moL/LCMC binder waxaa lagu hayaa 698mAh/g, 555mAh/g iyo 550mAh/g, siday u kala horreeyaan.

Isku-xidhka CMC waxa loo isticmaalaa LiTI0.: iyo SnO2 nanoparticles ee wax soo saarka warshadaha.Isticmaalka CMC sida binder, LiFepO4 iyo Li4TI50l2 sida walxaha firfircoon ee togan iyo kuwa taban, siday u kala horreeyaan, iyo isticmaalka pYR14FS1 sida elektrolytka ololka, batteriga waxaa lagu baaskiilay 150 jeer wakhtiga 0.1c ee 1.5v ~ 3.5V heerkulka, iyo gaar ahaaneed ee togan. awoodda ayaa lagu ilaalinayay 140mAh/g.Ka mid ah cusbada birta ee kala duwan ee CMC, CMCLi waxay soo bandhigaysaa ions birta kale, kuwaas oo joojin kara "falcelinta sarrifka (vii)" ee elektrolytka inta lagu jiro wareegga.

2) Habka hagaajinta waxqabadka

CMC Li binder wuxuu wanaajin karaa waxqabadka korantada ee AQ saldhigga korantada ee baytariga lithium.M. E iyo al.-4 waxay samaysay daraasad horudhac ah oo ku saabsan habka waxayna soo jeedisay qaabka qaybinta CMC-Li ee AQ electrode.Waxqabadka wanaagsan ee CMLi wuxuu ka yimaadaa saamaynta isku xidhka xooggan ee curaarta hydrogen ee ay soo saarto OH, taas oo gacan ka geysata samaynta hufan ee dhismayaasha mesh.CMC-Li hydrophilic kuma milmi doonto elektrolytka organic, sidaas darteed waxay leedahay xasillooni wanaagsan oo batteriga ah, waxayna leedahay adhesion xoog leh oo ku saabsan qaab dhismeedka korantada, taas oo ka dhigaysa batteriga inuu leeyahay xasillooni wanaagsan.Isku-xidhaha Cmc-li wuxuu leeyahay hab-dhaqan wanaagsan sababtoo ah waxaa jira tiro badan oo kooxo shaqeynaya silsiladda molecular ee CMC-Li.Inta lagu jiro dheecaanka, waxaa jira laba ilood oo walxaha waxtarka leh ee la dhaqma Li: (1) Li ku jira electrolyte;(2) Li on silsiladda molecular ee CMC-Li oo u dhow xarunta waxtarka leh ee walaxda firfircoon.

Falcelinta kooxda hydroxyl iyo kooxda hydroxyl ee carboxymethyl CMC-Li binder waxay samayn doontaa dammaanad covalent;Marka la eego ficilka xoogga goobta korantada, U wuxuu ku wareejin karaa silsiladda molecular ama silsiladda molecular ee ku xigta, taas oo ah, qaabka silsiladda kelli ma dhaawacmi doono;Ugu dambeyntii, Lj waxay ku xidhnaan doontaa qaybta AQ.Tani waxay muujinaysaa in codsiga CMLi aanu kaliya wanaajin wax ku oolnimada wareejinta Li, laakiin sidoo kale waxay hagaajinaysaa heerka isticmaalka AQ.Markasta oo ay sareeyso waxa ku jira chH: COOli iyo 10Li ee silsiladda molecular, wareejinta Li ayaa fududaaneysa.M. Arrmand iyo al.Waxa la rumaysan yahay in iskudhisyada dabiiciga ah ee -COOH ama OH ay la falcelin karaan 1 Li siday u kala horreeyaan oo ay u soo saaraan 1 C00Li ama 1 0Li awood hoose.Si loo sii sahamiyo habka CMLi binder in electrode, CMC-Li-1 waxaa loo isticmaalay wax firfircoon iyo gunaanad la mid ah ayaa la helay.Li waxa uu kaga falceliyaa hal cH, COOH iyo hal 0H oo ka socda CMC Li waxana uu soo saaraa cH: COOli iyo hal 0 “ siday u kala horreeyaan, sida ku cad isla'egyada (1) iyo (2)

Markay tirada chH, COOli, iyo OLi korodho, DS ee CMC-Li way korodhaa.Tani waxay tusinaysaa in lakabka organic ka kooban inta badan AQ qayb xidhaha dusha uu noqdo mid xasiloon oo sahlan in lagu wareejiyo Li.CMLi waa polymer-ka-qaade kaas oo siiya marin gaadiid ee Li si uu u gaaro dusha sare ee qaybaha AQ.Xirayaasha CMLi waxay leeyihiin koronto elektaroonig ah iyo ionic wanaagsan, taas oo keeneysa waxqabadka korantada kiimikada wanaagsan iyo nolosha wareegga dheer ee korontoyda CMLi.JS Bridel iyo al.waxay diyaarisay anode-ka baytari lithium ion iyadoo la isticmaalayo silikoon/kaarboon/polymer agabyo isku dhafan oo leh xidhidhyo kala duwan si ay u daraaseeyaan saamaynta isdhexgalka ka dhexeeya silikoon iyo polymer ee waxqabadka guud ee baytariga, waxaana la ogaaday in CMC uu lahaa waxqabadka ugu fiican marka loo isticmaalo binder ahaan.Waxaa jira xiriir xooggan oo hydrogen ah oo u dhexeeya silikoon iyo CMC, kaas oo leh awood is-bogsiin ah oo hagaajin kara culeyska sii kordhaya ee walxaha inta lagu jiro habka baaskiilka si loo ilaaliyo xasilloonida qaabdhismeedka walxaha.Iyadoo CMC ay tahay binder, awoodda silicon anode waxaa lagu hayn karaa in ka badan 1000mAh / g ugu yaraan 100 wareegyo, iyo waxtarka coulomb wuxuu ku dhow yahay 99.9%.

3, gunaanad

Sida binder ah, walxaha CMC waxaa loo isticmaali karaa noocyo kala duwan oo qalabka elektiroonigga ah sida graphite dabiiciga ah, meso-phase carbon microspheres (MCMB), lithium titanate, daasad ku salaysan silicon ku salaysan walxaha anode iyo lithium bir fosfat walxaha anode, taas oo wanaajin kara batteriga. awoodda, xasilloonida wareegga iyo nolosha meertada marka la barbar dhigo pYDF.Waxay faa'iido u leedahay xasiloonida kulaylka, dhaqdhaqaaqa korantada iyo sifooyinka korantada ee alaabta CMC.Waxaa jira laba hab oo waaweyn oo loogu talagalay CMC si loo horumariyo waxqabadka baytariyada lithium ion:

(1) Waxqabadka isku xidhka xasilloon ee CMC waxay abuurtaa shuruudo lagama maarmaan ah si loo helo waxqabadka batteriga deggan;

(2) CMC waxay leedahay koronto wanaagsan iyo koronto ion waxayna kor u qaadi kartaa wareejinta Li