Kukho izalathisi ezininzi zobugcisa zezinto ze-graphite anode, kwaye kunzima ukuziqwalasela, ikakhulu kubandakanya indawo ethile yomphezulu, ukusasazwa kobungakanani besuntswana, uxinano lwetaphu, uxinano lokuxinana, uxinano lokwenyani, uxinano lokuqala kunye nomthamo othile wokukhupha, ukusebenza kakuhle kokuqala, njl. Ukongeza, kukho izalathisi ze-electrochemical ezifana nokusebenza komjikelo, ukusebenza kwesantya, ukudumba, njalo njalo. Ngoko ke, zeziphi izalathisi zokusebenza kwezinto ze-graphite anode? Oku kulandelayo kwaziswa kuwe yi-HCMilling (Guilin Hongcheng), umenzi we-izixhobo ze-anode umsi wokugaya.

01 indawo ethile yomphezulu

Ibhekisa kummandla womphezulu wento ngeyunithi nganye yobunzima. Okukhona isuntswana lincinci, kokukhona indawo ethile yomphezulu inkulu.

I-electrode engalunganga eneziqwenga ezincinci kunye nommandla ophezulu womphezulu othile ineetshaneli ezininzi kunye neendlela ezimfutshane zokufuduka kwe-lithium ion, kwaye ukusebenza kwesantya kungcono. Nangona kunjalo, ngenxa yendawo enkulu yokunxibelelana ne-electrolyte, indawo yokwenza ifilimu ye-SEI nayo inkulu, kwaye ukusebenza kakuhle kokuqala kuya kuba sezantsi. . Iziqwenga ezinkulu, kwelinye icala, zinenzuzo yoxinano olukhulu lokuxinana.

Indawo ethile yomphezulu wezinto ze-graphite anode ingcono ibe ngaphantsi kwe-5m2/g.

02 Ukusasazwa kobungakanani bamasuntswana

Impembelelo yobukhulu besuntswana yezinto ze-graphite anode ekusebenzeni kwayo nge-electrochemical kukuba ubungakanani besuntswana bezinto ze-anode buya kuchaphazela ngokuthe ngqo uxinano lwempompo yezinto kunye nommandla othile womphezulu wezinto.

Ubungakanani boxinano lwempompo buya kuchaphazela ngokuthe ngqo uxinano lwamandla omthamo wezinto, kwaye kuphela ukusasazwa kobungakanani beesuntswana ezifanelekileyo zezinto ezinokwenza ngcono ukusebenza kwezinto.

03 Uxinano lweTap

Uxinano lwempompo bubunzima ngeyunithi nganye bulinganiswa ngokungcangcazela okwenza umgubo ubonakale uqinile. Luphawu olubalulekileyo lokulinganisa izinto ezisebenzayo. Ubungakanani bebhetri ye-lithium-ion bulinganiselwe. Ukuba uxinano lwempompo luphezulu, izinto ezisebenzayo ngeyunithi nganye zinobunzima obukhulu, kwaye umthamo wobungakanani uphezulu.

04 Uxinano lokuxinana

Uxinano lokuxinana lubhekiselele ikakhulu kwisiqwenga sepali, esibhekisa kuxinano emva kokuqengqeleka emva kokuba izinto ezisebenzayo ze-electrode engalunganga kwaye i-binder yenziwe kwisiqwenga sepali, uxinano lokuxinana = uxinano lwendawo / (ubukhulu besiqwenga sepali emva kokuqengqeleka kuthatyathwe ubukhulu befoyile yobhedu).

Uxinano lokuxinana lunxulumene ngokusondeleyo nomthamo wephepha elithile, ukusebenza kakuhle, ukumelana kwangaphakathi kunye nokusebenza komjikelo webhetri.

Izinto ezichaphazela uxinano lokuxinana: ubungakanani bamasuntswana, usasazo kunye nemo yazo zonke zinefuthe.

05 Uxinano Lokwenyani

Ubunzima bento eqinileyo ngeyunithi nganye yomthamo wento ekwimeko exineneyo ngokupheleleyo (ngaphandle kwezithuba zangaphakathi).

Ekubeni uxinano lokwenyani lulinganiswa kwimeko exineneyo, luya kuba phezulu kunoxinano oluxinanisiweyo. Ngokubanzi, uxinano lokwenyani > uxinano oluxinanisiweyo > uxinano oluxinanisiweyo.

06 Itshaja yokuqala kunye nomthamo othile wokukhupha

Izinto ze-graphite anode zinamandla angaguqukiyo kumjikelo wokuqala wokutshaja nokukhupha itshaja. Ngexesha lenkqubo yokuqala yokutshaja yebhetri ye-lithium-ion, umphezulu wezinto ze-anode udityaniswe nee-ion ze-lithium kwaye iimolekyuli ze-solvent kwi-electrolyte zifakwa kunye, kwaye umphezulu wezinto ze-anode uyabola ukuze wenze i-SEI. Ifilimu yokudlulisa. Kuphela emva kokuba umphezulu we-electrode engalunganga ugutyungelwe ngokupheleleyo yifilimu ye-SEI, iimolekyuli ze-solvent azikwazanga ukuxubana, kwaye impendulo yamiswa. Ukuveliswa kwefilimu ye-SEI kudla inxalenye yee-ion ze-lithium, kwaye le nxalenye yee-ion ze-lithium ayinakukhutshwa kumphezulu we-electrode engalunganga ngexesha lenkqubo yokukhupha, ngaloo ndlela ibangela ukulahleka kwamandla angaguqukiyo, ngaloo ndlela kunciphisa amandla athile okukhupha kokuqala.

07 Ukusebenza kakuhle kweCoulomb yokuqala

Isalathisi esibalulekileyo sokuvavanya ukusebenza kwezinto ze-anode kukusebenza kwazo kokuqala kokutshaja nokukhupha itshaja, okwaziwa ngokuba kukusebenza kokuqala kweCoulomb. Okokuqala ngqa, ukusebenza kakuhle kweCoulombic kumisela ngokuthe ngqo ukusebenza kwezinto ze-electrode.

Ekubeni ifilimu ye-SEI yenziwe kakhulu phezu komphezulu wezinto ze-electrode, indawo ethile yomphezulu wezinto ze-electrode ichaphazela ngokuthe ngqo indawo yokwakheka kwefilimu ye-SEI. Okukhona indawo ethile yomphezulu inkulu, kokukhona indawo yokunxibelelana ne-electrolyte inkulu kwaye kokukhona indawo yokwenza ifilimu ye-SEI inkulu.

Ngokwesiqhelo kukholelwa ukuba ukwenziwa kwefilimu ye-SEI ezinzileyo kuluncedo ekutshajeni nasekukhupheni ibhetri, kwaye ifilimu ye-SEI engazinzile ayilungelanga ukusabela, okuya kuhlala kusitya i-electrolyte, kutyebise ubukhulu befilimu ye-SEI, kwaye konyuse ukumelana kwangaphakathi.

08 Ukusebenza komjikelo

Ukusebenza komjikelo webhetri kubhekisa kwinani leetshaja kunye nokukhupha ibhetri phantsi kolawulo oluthile lokutshaja kunye nokukhupha xa amandla ebhetri ehla ukuya kwixabiso elithile. Ngokuphathelele ukusebenza komjikelo, ifilimu ye-SEI iya kuthintela ukusasazeka kwee-ion ze-lithium ukuya kwinqanaba elithile. Njengoko inani leemijikelo lisanda, ifilimu ye-SEI iya kuqhubeka nokuwa, ixobuke, kwaye idiphozithe kumphezulu we-electrode engalunganga, nto leyo ekhokelela ekunyukeni kancinci kancinci kokumelana kwangaphakathi kwe-electrode engalunganga, nto leyo ebangela ukulahleka kobushushu.

09 Ulwandiso

Kukho unxibelelwano oluhle phakathi kokwanda kunye nobomi bomjikelo. Emva kokuba i-electrode engalunganga yandile, okokuqala, i-winding core iya konakala, amasuntswana e-electrode engalunganga aya kwenza ii-micro-cracks, ifilimu ye-SEI iya kwaphuka kwaye ihlelwe ngokutsha, i-electrolyte iya kutyiwa, kwaye ukusebenza komjikelo kuya kuba kubi; okwesibini, i-diaphragm iya kucinezelwa. Uxinzelelo, ngakumbi ukukhutshwa kwe-diaphragm kumda we-engile yasekunene yendlebe ye-pole, lubi kakhulu, kwaye kulula ukubangela i-micro-short circuit okanye i-micro-metal lithium precipitation ngokuqhubeka komjikelo wokukhupha itshaja.

Ngokuphathelele ulwandiso ngokwalo, ii-ion ze-lithium ziya kufakwa kwisithuba se-graphite interlayer ngexesha lenkqubo yokudibanisa i-graphite, nto leyo ebangela ukwandiswa kwesithuba se-interlayer kunye nokwanda komthamo. Le nxalenye yokwandisa ayinakuguqulwa. Ubungakanani bolwandiso bunxulumene nomlinganiselo wokuqondisa we-electrode engalunganga, inqanaba lokuqondisa = I004/I110, elinokubalwa kwidatha ye-XRD. Izinto ze-graphite ze-anisotropic zihlala zikhula nge-lattice kwicala elifanayo (icala le-C-axis le-graphite crystal) ngexesha lenkqubo yokudibanisa i-lithium, nto leyo eya kubangela ukwandiswa komthamo omkhulu webhetri.

10Kala ukusebenza

Ukusasazeka kwee-ion ze-lithium kwizinto ze-anode ze-graphite kunecala eliqinileyo, oko kukuthi, inokufakwa kuphela ngokuthe nkqo kubuso bokugqibela be-C-axis yekristale ye-graphite. Izinto ze-anode ezineenxalenye ezincinci kunye nommandla ophezulu womphezulu zisebenza ngcono. Ukongeza, ukumelana nomphezulu we-electrode (ngenxa yefilimu ye-SEI) kunye nokuqhuba kwe-electrode nako kuchaphazela ukusebenza kwesantya.

Kufana nobomi bomjikelo kunye nokwandiswa, i-electrode ye-isotropic negative ineendlela ezininzi zokuthutha i-lithium ion, ezisombulula iingxaki zokungena okuncinci kunye namazinga aphantsi okusasazwa kwisakhiwo se-anisotropic. Uninzi lwezixhobo zisebenzisa ubuchwepheshe obufana ne-granulation kunye ne-coating ukuphucula ukusebenza kwazo kwesantya.

I-HCMilling (Guilin Hongcheng) ngumvelisi wesixhobo sokugaya izixhobo ze-anode.Uthotho lwe-HLMXizixhobo ze-anode kakhulu-isixhobo sokugalela esithe nkqo esicolekileyo, I-HCHizixhobo ze-anode isigayo esicolekileyo kakhulukunye nezinye izixhobo zokugaya i-graphite eziveliswe sithi zisetyenziswa kakhulu ekuveliseni izixhobo ze-graphite anode. Ukuba uneemfuno ezifanayo, nceda unxibelelane nathi ukuze ufumane iinkcukacha ngezixhobo kwaye usinike ulwazi olulandelayo:

Igama lezinto eziluhlaza

Ukuqina kwemveliso (i-mesh/μm)

umthamo (t/h)