Sei iyo lithium bhatiri ichaitika, chii chinokonzera lithium bhatiri chigubhu?

2022/04/08

Munyori: Iflowpower -Inotakurika Power Station Mutengesi

I. Chikonzero che lithium-ion battery drums ndicho chikonzero chechikonzero chechikonzero cheiyo lithium ion battery. Rudzi rwekutanga: mugadziri wekugadzira dhizaini Dambudziko rakakonzerwa nevagadziri vazhinji, vagadziri vazhinji vanodhura, kuitira kuti nzvimbo yekugadzira yakashata, kushandiswa kuchabviswa michina muchina Mirira, kuitira kuti kupfeka kwebhatiri kusaenzana, uye guruva zvidimbu. inosanganiswa mu electrolyte.

Izvi zvinogona kugadzira lithium-ion bhatiri mapaketi mukushandiswa kwemushandisi, zvakatonyanya kuipa. Chechipiri: Rudzi rwechipiri rwemashandisirwo emushandisi zuva nezuva nderekuti mushandisi pachake, kana mushandisi akashandisa zvisina kufanira kushandiswa pakushandisa lithium-ion bhatiri zvigadzirwa, sepamusoro pechaji pamusoro pekubuda, kana kushandiswa kuenderera munzvimbo ine hutsinye, zvinokwanisika ita kuti zvikwanise kugadzira Lithium-ion bhatiri kuvapo dhiramu bhegi. Chechitatu: Kureba kwenguva refu kusingabatsiri uye kusina kukodzera kwechigadzirwa, kushanda kwepakutanga kuchadonha, bhatiri harina kushandiswa kwenguva yakareba, uye ipapo hapana nzira yekuchengetedza iri nani.

Kana iyo isingashandisi mumhepo kuratidzwa kwenguva refu, uye simba rakazara. Sezvo mhepo inofambisa magetsi, nguva yakarebesa, yakaenzana nekutarisa zvakananga ne electrode yakanaka uye yakaipa yebheteri, uye chidimbu chisingaperi chisingaperi chinoitwa. Kamwe dunhu pfupi richapisa, kumwe kuparara kwe electrolyte kunotoiswa gasi, zvichikonzera bhegi redhiramu.

Iyo yakanaka electrode zvinhu ine chikamu chikuru (kazhinji pa70% kusvika 80%), nokuti kushanda kweiyo yakanaka electrode zvinhu kunobata zvakananga kushanda kwe lithium ion bateri, uye mari yacho yakaderera zvakananga. Iyo yakanaka electrode zvinhu yakaverengera 30% kusvika 40% yelithium ion bhatiri, uye zvakare inokanganisa zvakananga kuwanda kwesimba uye kushanda kwe lithium ion bhatiri pack. Iyo yakaipa electrode zvinhu inoumbwa nechinhu chakabatana neyakaderera yakanaka electrode kugona, uye ine yakakwira chaiyo kugona uye zvirinani kuchaja uye kuburitsa, nekudaro kuchengetedza saizi yakanaka uye kugadzikana kwemagetsi panguva ye-in-cell lithium (hapana deformation yakaoma).

Iyo yakaipa electrode zvinhu zvakakosha kukanganisa kushanda kwe lithium-ion bhatiri, uye kushanda kweiyo negative electrode zvinhu zvinokanganisawo zvakananga kushanda kwe lithium-ion bhatiri. Iyo yakaipa electrode zvinhu inosvika gumi kusvika makumi maviri muzana yemutengo wakakwana webhatiri re lithium ion. Pachikamu cheiyo negative electrode, kusanganisira kabhoni system, non-carbon-based negative electrode.

Iyo electrolytic fluid electrolyte inoshanda mukutakura charge pakati peiyo yakanaka electrode neiyo negative electrode (yakafanana neinotakura muredhiyo), ine yakakwirira ionic conductivity, kazhinji inofanira kusvika 1x10-3 ~ 2x10-2s / cm. Iyo inokanganisa huwandu hwesimba, yakakura tembiricha application, kutenderera hupenyu, simba density, kuchengetedza kuita uye zvimwe zvinhu zvelithium-ion bhatiri mapaketi. Iyo diaphragm diaphragm ine imwe dhayamita yepore uye porosity, inovimbisa kushomeka kwekudzivirira uye yakakwirira ion conductivity, ine yakanaka kupenya kune lithium ion, kupinza kwakanaka kwe electrolyte uye ine yakakwana inonyudza kunyorova kugona, uye kubata ion.

Conductivity, nepo iine electron insulation, kuve nechokwadi chekutsaurwa kwemakanika kweakanaka uye asina kunaka mapango, mukuwedzera, panofanirwa kuve nekukwana kwesimba rekupinza, michina yemagetsi senge kusimba kwesimba uye corrosive kuramba uye yakakwana electrochemical kugadzikana. Dynamic lithium bhatiri ine zvakakwirira zvinodiwa zve diaphragm, inowanzo shandiswa mucomposite firimu. Lithium ion bhatiri Kushanda musimboti: Lithium ion bhatiri bhatiri rinochajwa, izvo zvakakosha kutsamira pakudzika-ejection embedding uye deinterlating pakati pelithium ions pakati peiyo yakanaka electrode neiyo negative electrode kuti uwane kuchengetedza uye kuburitsa simba.

Pane zviitiko zviviri mukuita kubhadharisa uye kuburitsa: imwe. Kunyanya kubhadharisa kunokonzerwa nekuwedzerwa kunogona kuita kuti maatomu ose e-lithium ari mumagetsi e electrode aende kune negative electrode material, zvichiita kuti pave neshanduko yegedhi yakanyungudutswa yakanaka, inovawo chikonzero chakakosha chekuderera kwebhatiri ye lithium-ion. Munguva iyi, iyo lithium ions ye electrode yakaipa iri kuwedzera, uye kuwedzera-kuunganidza kunobvumira kuti lithiamu atomu ijekeswe, kuitira kuti bhatiri riwedzere.

piri. Mukutanga kuchaja uye kuburitsa maitiro eiyo liquid lithium ion bhatiri, iyo electrode zvinhu inobatwa pane yakasimba-yemvura chikamu interface mune yemvura lithium ion bhatiri, ichigadzira passivation layer inovhara pamusoro peiyo electrode zvinhu. Iyo yakaumbwa passivation layer firimu inokwanisa kudzivirira zvinobudirira kupfuura kweiyo electrolyte molecule, asi Li + inogona kuisirwa zvakasununguka uye kubviswa nepassivation layer, uye ine hunhu hweiyo yakasimba electrolyte, saka iyi layer yepassivation firimu inodaidzwa seyakasimba. electrolyte interface mask.

(SolideElectrolyteinterface), inonzi SEI. Iyo SEI firimu ichadzivirira iyo yakaipa electrode zvinhu, kuitira kuti chimiro chemidziyo chisave nyore kudonha, uye hupenyu hwekutenderera hwemagetsi emagetsi hunogona kuwedzerwa. Iyo SEI firimu haisi yenguva dzose, pachava nekuchinja kudiki panguva yekuchaja uye yekuburitsa maitiro, zvakakosha kuti imwe organic zvinhu idzorere shanduko.

Mushure mekunge bhatiri ranyanya kubudiswa, iyo SEI firimu inoitika reversible kutyora mhete, uye SEI kuparadzwa kweiyo negative electrode zvinhu kunoita kuti iyo negative electrode zvinhu zvipunzike, zvichibva zvagadzira chiitiko chakawanda.

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