Kukho izibonakaliso ezininzi zobugcisa bezinto ze-graphite anode, kwaye kunzima ukuqwalasela, ngokukodwa kubandakanywa indawo ethile, ukusabalalisa ubungakanani be-particle, i-tap density, i-compaction density, ubuninzi bokwenene, ukuhlawulwa kokuqala kunye nokukhupha umthamo othile, ukusebenza kakuhle kokuqala, njl. Ukongeza, kukho izikhombisi ze-electrochemical ezifana nokusebenza komjikelo, ukusebenza kwezinga, ukudumba, njalo njalo.Ke, zithini izikhombisi zokusebenza zegraphite anode materials?Lo mxholo ulandelayo waziswa kuwe ngu-HCMilling(Guilin Hongcheng), umenzi weizixhobo anode ilitye lokusila.

01 indawo ethile yomphezulu

Ibhekisa kumphezulu wento ngeyunithi ubunzima.Incinci i-particle, inkulu indawo ethile yomhlaba.

I-electrode engafanelekanga kunye neencinci ezincinci kunye nommandla ophezulu ophezulu unamashaneli amaninzi kunye neendlela ezimfutshane zokufuduka kwe-lithium ion, kwaye ukusebenza kwezinga kungcono.Nangona kunjalo, ngenxa yendawo enkulu yoqhagamshelwano kunye ne-electrolyte, indawo yokwenza ifilimu ye-SEI nayo inkulu, kwaye ukusebenza kakuhle kokuqala kuya kuba ngaphantsi..Amasuntswana amakhulu, kwelinye icala, anenzuzo yoxinaniso olukhulu.

Ummandla othe ngqo wezinto ze-graphite anode zikhethwa ngaphantsi kwe-5m2 / g.

02 Ukuhanjiswa kobungakanani besuntswana

Impembelelo ye-particle ye-graphite anode material ekusebenzeni kwayo kwe-electrochemical kukuba ubukhulu be-particle ye-anode material buya kuchaphazela ngokuthe ngqo ukuxinana kwempompo yezinto eziphathekayo kunye nommandla othile wezinto eziphathekayo.

Ubungakanani bobuninzi bempompo buya kuchaphazela ngokuthe ngqo umthamo wamandla omthamo wezinto eziphathekayo, kwaye kuphela ukusabalalisa ubungakanani be-particle efanelekileyo yezinto eziphathekayo kunokwandisa ukusebenza kwezinto.

03 Uxinaniso lweTephu

Uxinaniso lwempompo bubunzima ngeyunithi yevolumu nganye elinganiswa ngokungcangcazela okwenza umgubo ubonakale ukwimo yokupakisha eqinile.Luphawu olubalulekileyo lokulinganisa izinto ezisebenzayo.Umthamo webhetri ye-lithium-ion ulinganiselwe.Ukuba ubuninzi bompompo buphezulu, into esebenzayo kwiyunithi nganye inobunzima obukhulu, kwaye umthamo wevolumu uphezulu.

04 Uxinaniso lweCompaction

Uxinaniso loxinaniso lwenzelwe ubukhulu becala isiqwenga sepali, esibhekiselele kuxinaniso emva kokuqengqeleka emva kokuba i-electrode engasebenziyo imathiriyeli esebenzayo kunye nesibophelelo senziwe kwisiqwenga sepali, ukuxinana koxinzelelo = uxinano lwendawo / (ubukhulu beqhekeza lepali emva kokuqengqeleka thabatha ubukhulu befoyile yobhedu).

Uxinaniso loxinaniso lunxulumene ngokusondeleyo nomthamo othile wephepha, ukusebenza kakuhle, ukuchasana kwangaphakathi kunye nokusebenza komjikelo webhetri.

Izinto ezichaphazelayo zoxinaniso lokuxinana: ubungakanani besuntswana, ukusabalalisa kunye ne-morphology zonke zinefuthe.

05 Ukuxinana Kwenyani

Ubunzima bezinto eziqinileyo ngeyunithi nganye yesixhobo esikwimo exinene ngokupheleleyo (kungabandakanywa i-voids yangaphakathi).

Kuba ingxinano yokwenyani ilinganiswa kwimo ebambeneyo, iya kuba phezulu kunoxinaniso olucothiweyo.Ngokubanzi, ingxinano yokwenyani > ingxinano ehlanganisiweyo > ingxinano etepiweyo.

06 Intlawulo yokuqala kunye nokukhupha umthamo othile

Izinto ze-graphite anode zinomthamo ongenakuguqulwa kumjikelo wokuqala wokukhutshwa kwentlawulo.Ngethuba lokuqala kwenkqubo yokutshaja ibhetri ye-lithium-ion, umphezulu wezinto ze-anode zidibene kunye ne-lithium ion kunye neamolekyu ezinyibilikayo kwi-electrolyte zifakwe ngokubambisana, kwaye umphezulu wezinto ze-anode zibola ukwenza i-SEI.Ifilimu yePassivation.Kuphela emva kokuba indawo engafanelekanga ye-electrode igutyungelwe ngokupheleleyo yifilimu ye-SEI, iimolekyuli ze-solvent azikwazanga ukudibanisa, kwaye ukusabela kwamiswa.Ukuveliswa kwefilimu ye-SEI kudla inxalenye ye-lithium ion, kwaye le nxalenye ye-lithium ion ayikwazi ukukhutshwa kumphezulu we-electrode engafanelekanga ngexesha lenkqubo yokukhupha, ngaloo ndlela ibangela ukulahlekelwa kwamandla okungenakuguqulwa, ngaloo ndlela inciphisa amandla athile okukhutshwa kokuqala.

07 Ukusebenza kakuhle kweCoulomb

Isalathisi esibalulekileyo sokuvavanya ukusebenza kwezixhobo ze-anode kukusebenza kwayo kokuqala kokukhutshwa kwentlawulo, eyaziwa ngokuba yi-Coulomb yokuqala esebenzayo.Ngethuba lokuqala, ukusebenza kakuhle kweCoulombic kubeka ngokuthe ngqo ukusebenza kwezinto ze-electrode.

Ekubeni ifilimu ye-SEI ininzi yenziwe phezu kwezinto eziphathekayo ze-electrode, indawo ethile yendawo yezinto ze-electrode ichaphazela ngokuthe ngqo indawo yokwakheka kwefilimu ye-SEI.Inkulu indawo ethile yendawo, inkulu indawo yoqhagamshelwano kunye ne-electrolyte kunye nommandla omkhulu wokwenza ifilimu ye-SEI.

Ngokuqhelekileyo kukholelwa ukuba ukubunjwa kwefilimu ye-SEI ezinzileyo kunenzuzo ekutshajweni nasekukhutshweni kwebhetri, kwaye ifilimu ye-SEI engazinzanga ayikuthandi ukusabela, okuya kuthi rhoqo kudle i-electrolyte, ukutyebisa ubukhulu befilimu ye-SEI, kwaye ukwandisa ukumelana kwangaphakathi.

08 Ukusebenza komjikelo

Ukusebenza komjikelo webhetri kubhekiselele kwinani leentlawulo kunye nokukhutshwa ibhetri elifumana phantsi kwentlawulo ethile kunye nenkqubo yokukhupha xa umthamo webhetri uhla kwixabiso elichaziweyo.Ngokumalunga nokusebenza komjikelo, ifilimu ye-SEI iya kuthintela ukusasazwa kwe-lithium ion ukuya kwinqanaba elithile.Njengoko inani lemijikelezo likhula, ifilimu ye-SEI iya kuqhubeka iwa, ixobukile, kwaye idipozithi phezu kwe-electrode engalunganga, okukhokelela ekunyuseni ngokuthe ngcembe ukuchasana kwangaphakathi kwe-electrode engalunganga, okuzisa ukushisa Ukuqokelela kunye nokulahlekelwa kwamandla. .

09 Ukwandiswa

Kukho unxibelelwano oluhle phakathi kokwandiswa kunye nobomi bomjikelezo.Emva kokuba i-electrode engathandekiyo yanda, okokuqala, i-core winding iya kuphazamiseka, i-electrode particles engalunganga iya kwenza i-micro-cracks, ifilimu ye-SEI iya kuphulwa kwaye ihlelwe ngokutsha, i-electrolyte iya kusetyenziswa, kwaye ukusebenza komjikelo kuya kuhla;okwesibini, i-diaphragm iya kucudiswa.Uxinzelelo, ngokukodwa ukukhutshwa kwe-diaphragm kwi-angle-angle edge ye-pole ear, inzima kakhulu, kwaye kulula ukubangela i-micro-short circuit okanye i-micro-metal lithium precipitation kunye nenkqubela phambili yomjikelezo wokukhupha intlawulo.

Ngokubhekiselele kulwandiso ngokwalo, i-ion ze-lithium ziya kufakwa kwi-graphite interlayer spacing ngexesha lenkqubo yokudibanisa i-graphite, okukhokelela ekwandiseni isithuba se-interlayer kunye nokunyuka komthamo.Le nxalenye yokwandisa ayinakuguqulwa.Isixa sokwandiswa sihambelana neqondo lokuqhelaniswa ne-electrode engalunganga, iqondo lokuqhelanisa = I004 / I110, enokubalwa kwidatha ye-XRD.I-anisotropic graphite material ithambekele ekukhuliseni i-lattice kwicala elifanayo (i-C-axis direction ye-graphite crystal) ngexesha lenkqubo ye-lithium intercalation, eya kubangela ukwanda kwevolumu enkulu yebhetri.

10Ukulinganisa ukusebenza

Ukusasazwa kwe-lithium ion kwi-graphite anode material ine-directionality eyomeleleyo, oko kukuthi, inokufakwa kuphela i-perpendicular ukuya ekupheleni kobuso be-C-axis ye-crystal graphite.Izixhobo ze-anode ezinamasuntswana amancinci kunye nommandla ophakamileyo ophezulu zinomgangatho ongcono wokusebenza.Ukongezelela, ukuxhatshazwa kwe-electrode surface (ngenxa yefilimu ye-SEI) kunye ne-electrode conductivity nayo ichaphazela izinga lokusebenza.

Ngokufanayo nobomi bomjikelezo kunye nokwandiswa, i-electrode ye-isotropic negative ineendlela ezininzi zothutho ze-lithium ion, ezisombulula iingxaki zokungena okuncinci kunye namazinga aphantsi okusabalalisa kwisakhiwo se-anisotropic.Uninzi lwezixhobo zisebenzisa itekhnoloji efana negranulation kunye nokwaleka ukuphucula ukusebenza kwazo.

I-HCMilling(Guilin Hongcheng) ngumvelisi wezinto zokusila ze anode.HLMX seriesizixhobo anode super-ilitye lokusila elithe nkqo, HCHizixhobo anode ilitye lokusilakunye nezinye iigrafu zokusila eziveliswe sithi zisetyenziswe ngokubanzi kwimveliso ye-graphite anode materials.Ukuba uneemfuno ezinxulumeneyo, nceda uqhagamshelane nathi ngeenkcukacha zesixhobo kwaye unikezele ngolwazi olulandelayo kuthi:

Igama lempahla ekrwada

Ukulunga kwemveliso(umnatha/μm)

umthamo (t/h)