CMC inoshandisa muBattery Indasitiri

Chii chinonzi sodium carboxymethyl cellulose?

Sodium Carboxymethyl cellulose, (inonziwo: Carboxymethyl cellulose sodium munyu, Carboxymethyl cellulose, CMC, Carboxymethyl, CelluloseSodium, SodiumsaltofCaboxyMethylCellulose) ndiyo inonyanya kushandiswa pasi rose mhando dzefiber, dosage yepamusoro.

Cmc-na inotorwa selulosi ine polymerization degree ye100 ~ 2000 uye molecular huremu hwe242.16. White fibrous kana granular powder. Haina hwema, isingaravike, isinganakidze, hygroscopic, isinganyungudika muorganic solvents. Iri bepa rinonyanya kunzwisisa mashandisirwo e sodium carboxymethyl cellulose mune lithium ion bhatiri ruzivo.

Kufambira mberi mukushandiswa kweSodium carboxymethyl cellulose CMCmumabhatiri e lithium ion

Parizvino, polyvinylidene fluoride [pVDF, (CH: A CF:)] inoshandiswa zvakanyanya sebinder mukugadzirwa kwemabhatiri e lithium ion. . PVDF haisi kungodhura chete, inodawo kushandisa mukuita kwekushandiswa kwezvinoputika, zvine hushamwari kune zvakatipoteredza zve organic solvents, senge N methyl iyo alkane ketone (NMp) uye humidity yemhepo zvinodiwa pakugadzirwa kwekugadzira zvakanyanya, zvakare nyore neyakaiswa mukati. simbi lithium, lithium graphite yechipiri reaction, kunyanya mumamiriro ekupisa kwakanyanya, njodzi inongoerekana yaitika yekupisa kwemhepo. Sodium carboxymethyl cellulose (CMC), inonyungudika mvura binder, inoshandiswa sechinotsiva pVDF yezvinhu zve electrode, izvo zvinogona kudzivirira kushandiswa kweNMp, kuderedza mari uye kuderedza kusvibiswa kwezvakatipoteredza. Panguva imwecheteyo, maitiro ekugadzira haadi humidity kwezvakatipoteredza, asi zvakare anogona kuvandudza kugona kwebhatiri, kurebesa hupenyu hwekutenderera. Mupepa iri, basa reCMC mukuita kwe lithium ion bhatiri rakaongororwa, uye nzira yeCMC yekuvandudza kushanda kwebhatiri yakapfupikiswa kubva kuzvinhu zvekugadzikana kwekupisa, magetsi emagetsi uye electrochemical maitiro.

1. Mamiriro uye kuita kweCMC

1) CMC chimiro

CMC inowanzorongedzerwa neyakasiyana dhigirii yekutsiva (Ds), uye chigadzirwa morphology uye kuita zvinokanganiswa zvakanyanya neDs. LXie et al. akadzidza THE CMC neDs dzakasiyana H pairi dzeNa. SEM ongororo mhedzisiro yakaratidza kuti CMC-Li-1 (Ds = 1.00) yakaratidza granular chimiro, uye CMC-Li-2 (Ds = 0.62) yakaratidza mutsara chimiro. Tsvagiridzo yeM. E et al yakaratidza kuti CMC. Styrene butadiene rubber (SBR) inogona kuvharidzira agglomeration yeLi: O uye kudzikamisa iyo interface chimiro, iyo inobatsira kune electrochemical kuita.

2) CMC kuita

2.1 )Thermal kugadzikana

Zj Han et al. akadzidza kugadzikana kwekupisa kwezvisungo zvakasiyana. Kupisa kwakanyanya kwepVDF kunosvika 4500C. Kana yasvika 500 ℃, kukurumidza kuora kunoitika uye huwandu hunoderedzwa ne70%. Apo tembiricha yakasvika 600 ℃, huremu hwakawedzera kuderedzwa ne70%. Kana tembiricha yasvika 300oC, kuwanda kweCMC-Li kwakaderedzwa ne70%. Pakasvika tembiricha pa400 ℃, kuwanda kweCMC-Li kwakaderedzwa ne10%. CMLi inoora zviri nyore kupfuura pVDF pakupera kwehupenyu hwebhatiri.

2.2 )The magetsi conductivity

S. Chou et al. 's test results yakaratidza kuti resistivity yeCMCLI-1, CMC-Li-2 uye pVDF yaiva 0.3154 Mn·m uye 0.2634 Mn, zvichiteerana. M uye 20.0365 Mn · m, zvichiratidza kuti resistivity yepVDF yakakwirira kudarika CMCLi, conductivity yeCMC-LI iri nani pane pVDF, uye conductivity ye CMCLI.1 yakaderera pane yeCMCLI.2.

2.3)Electrochemical performance

FM Courtel et al. akadzidza ma cyclic voltammetry curves epoly-sulfonate (AQ) based electrodes pakashandiswa mabinderswered akasiyana. Akasiyana mabhaidhi ane akasiyana oxidation uye kuderedza maitiro, saka iyo yepamusoro kugona kwakasiyana. Pakati pavo, iyo oxidation inogoneka yeCMLi ndeye 2.15V, uye iyo yekudzikisa inogona kuita 2.55V. Iyo oxidation inogona uye kuderedza kugona kwepVDF yaive 2.605 V uye 1.950 V zvakateerana. Kuenzaniswa neiyo cyclic voltammetry macurves enguva mbiri dzapfuura, iyo yepamusoro inogona mutsauko weiyo oxidation-yekuderedza peak paishandiswa CMCLi binder yaive idiki pane iyo paishandiswa pVDF, zvichiratidza kuti kuita kwacho kwaive kushoma kudziviswa uye CMCLi binder yaive yakanakira kuitika kweiyo oxidation-reduction reaction.

2. Maitiro ekushandisa uye maitiro eCMC

1) Maitiro ekushandisa

Pj Suo et al. akadzidza mashandiro eelectrochemical eSi/C composite zvinhu paishandiswa pVDF neCMC semabhandi, ndokuona kuti bhatiri rinoshandisa CMC raive nereverible specific reversity of 700mAh/g kekutanga uye richine 597mAh/g mushure me4O cycles, izvo. yaive yepamusoro kune bhatiri uchishandisa pVDF. Jh Lee nevamwe. akadzidza pesvedzero yeDs yeCMC pane kugadzikana kwegraphite kumiswa uye akatenda kuti mvura yemhando yekumisa yakatemwa naDs. Pazasi DS, CMC ine yakasimba hydrophobic zvimiro, uye inogona kuwedzera kuita negraphite pamusoro kana mvura ichishandiswa semidhiya. CMC zvakare ine zvakanakira kuchengetedza kugadzikana kweiyo cyclic zvimiro zvesilicon - tin alloy anode zvinhu. Iyo NiO electrodes yakagadzirirwa neyakasiyana-siyana (0.1mouL, 0.3mol / L uye 0.5mol / L) CMC uye pVDF binder, uye yakachajiswa uye yakaburitswa pa1.5-3.5V ine ikozvino ye0.1c. Munguva yekutanga kutenderera, kugona kwepVDF binder cell kwaive kwakakwirisa kupfuura kweCMC binder cell. Kana huwandu hwekutenderera hwasvika lO, simba rekuburitsa pVDF binder rinodzikira zviri pachena. Mushure mekutenderera kwe4JD, iyo chaiyo yekuburitsa masimba e0.1movL, 0.3MOUL uye 0.5MovLPVDF mabhainda akadzikira kusvika pa250mAh/g, 157mAtv 'g uye 102mAh/g, zvichiteerana: Kuburitsa hunyanzvi hwemabhatiri ne0,L/0. uye 0.5 moL/LCMC binder yakachengetwa pa698mAh/g, 555mAh/g uye 550mAh/g, zvichiteerana.

CMC binder inoshandiswa paLiTI0. : uye SnO2 nanoparticles mukugadzirwa kwemaindasitiri. Uchishandisa CMC sebhainda, LiFepO4 uye Li4TI50l2 sezvakanaka uye zvisina kunaka zvinhu zvinoshanda, zvichiteerana, uye kushandisa pYR14FS1 se electrolyte inodzoreredza moto, bhatiri rakatenderedzwa ka150 panguva ino ye 0.1c pa 1.5v ~ 3.5V patembiricha, uye iyo yakanaka chaiyo yakanangana capacitance yakachengetwa pa140mAh/g. Pakati peakasiyana simbi emunyu muCMC, CMCLi inosuma mamwe maion simbi, ayo anogona kumisa "exchange reaction (vii)" mu electrolyte panguva yekutenderera.

2) Mechanism yekuvandudza kwekuita

CMC Li binder inogona kuvandudza mashandiro emagetsi eAQ base electrode mu lithium bhatiri. M. E et al. -4 yakaita chidzidzo chekutanga pamusoro pemashini uye yakakurudzira muenzaniso wekugoverwa kweCMC-Li muAQ electrode. Kuita kwakanaka kweCMLi kunobva kune yakasimba bonding mhedzisiro yehydrogen zvisungo inogadzirwa neOH, iyo inobatsira pakuumbwa kwakanaka kwemesh zvimiro. Iyo hydrophilic CMC-Li haizonyungudika mu organic electrolyte, saka ine kugadzikana kwakanaka mubhatiri, uye ine yakasimba kunamatira kune electrode chimiro, izvo zvinoita kuti bhatiri rive nekugadzikana kwakanaka. Cmc-li binder ine yakanaka Li conductivity nekuti kune nhamba huru yemapoka anoshanda pane molecular cheni yeCMC-Li. Panguva yekubuda, kune matsime maviri ezvinhu zvinobudirira zvinoshanda neLi: (1) Li mu electrolyte; (2) Li pane molecular cheni yeCMC-Li padyo nenzvimbo inoshanda yechinhu chinoshanda.

Kuita kweboka re hydroxyl uye boka re hydroxyl mu carboxymethyl CMC-Li binder richaumba covalent bond; Pasi pekuita kwesimba remagetsi emagetsi, U inogona kuendesa pane molecular chain kana pedyo neketani yemamorekuru, kureva kuti, chimiro checheni hachizokuvadzwa; Pakupedzisira, Lj ichabatana neAQ particle. Izvi zvinoratidza kuti kushandiswa kweCMLi hakungonatsiridza kufambisa kweLi, asiwo kunovandudza chiyero chekushandiswa kweAQ. Iyo yakakwira zvirimo zvech: COOLi uye 10Li mune molecular cheni, iyo iri nyore kutamisa Li. M. Arrmand et al. aidavira kuti organic compounds ye -COOH kana OH inogona kuita ne 1 Li zvakateerana uye kuburitsa 1 C00Li kana 1 0Li pane yakaderera. Kuti uwedzere kuongorora maitiro eCMLi binder mu electrode, CMC-Li-1 yakashandiswa sechinhu chinoshanda uye mhedziso dzakafanana dzakawanikwa. Li inobata nechH imwe, COOH uye imwe 0H kubva kuCMC Li uye inogadzira cH: COOLi uye imwe 0 "zvichienderana, sezvinoratidzwa muequation (1) uye (2)

Sezvo nhamba yechH, COOLi, uye OLi inowedzera, THE DS yeCMC-Li inowedzera. Izvi zvinoratidza kuti organic layer inoumbwa zvakanyanya neAQ particle surface binder inova yakagadzikana uye nyore kutamisa Li. CMCLi ndeye conductive polymer inopa nzira yekufambisa kuti Li isvike pamusoro peAQ zvimedu. CMCLi mabhainda ane yakanaka yemagetsi uye ionic conductivity, izvo zvinoguma nekuita kwakanaka kwemagetsi emagetsi uye hupenyu hurefu hwekutenderera kweCMLi electrodes. JS Bridel et al. yakagadzira anode yelithium ion bhatiri ichishandisa silicon/carbon/polymer composite zvinhu zvine mabinder akasiyana kuti adzidze pesvedzero yekudyidzana pakati pesilicon nepolymer pakushanda kwebhatiri kwese, uye vakaona kuti CMC yaive nekushanda kwakanyanya payakashandiswa sebhainda. Iko kune yakasimba hydrogen bond pakati pesilicon neCMC, iyo ine-kuzviporesa kugona uye inogona kugadzirisa kuwedzera kushushikana kwezvinhu panguva yekufambisa bhasikoro kuchengetedza kugadzikana kwechimiro chechinhu. Iine CMC sebhainda, huwandu hwesilicon anode hunogona kuchengetwa pamusoro pe1000mAh/g mune angangoita zana ma cycles, uye kushanda kwecoulomb kuri pedyo ne99.9%.

3, mhedziso

Sechinhu chinosungira, CMC zvinhu zvinogona kushandiswa mumhando dzakasiyana dzemagetsi emagetsi akadai sechisikigo graphite, meso-phase kabhoni microspheres (MCMB), lithium titanate, tin based silicon based anode material uye lithium iron phosphate anode zvinhu, zvinogona kuvandudza bhatiri. kugona, kutenderera kugadzikana uye kutenderera hupenyu uchienzaniswa nepYDF. Inobatsira kune kugadzikana kwekupisa, magetsi conductivity uye electrochemical zvimiro zveCMC zvinhu. Pane nzira mbiri huru dzeCMC yekuvandudza mashandiro e lithium ion mabhatiri:

(1) Iyo yakagadzikana yekubatanidza kuita kweCMC inogadzira chinodiwa chinodiwa kuti uwane yakagadzikana bhatiri kuita;

(2) CMC ine yakanaka erekitironi uye ion conductivity uye inogona kukurudzira Li kutamiswa