Kunezinkomba eziningi zobuchwepheshe zezinto ze-graphite anode, futhi kunzima ukuzicabangela, ikakhulukazi okuhlanganisa indawo ethile yobuso, ukusatshalaliswa kosayizi wezinhlayiya, ubuningi bempompi, ubuningi bokuxinana, ubuningi beqiniso, ukushaja kokuqala kanye nomthamo othize wokukhipha, ukusebenza kahle kokuqala, njll. Ngaphezu kwalokho, kunezinkomba ze-electrochemical ezifana nokusebenza komjikelezo, ukusebenza kwesilinganiso, ukuvuvukala, njalo njalo. Ngakho-ke, yiziphi izinkomba zokusebenza kwezinto ze-graphite anode? Okuqukethwe okulandelayo kwethulwa kuwe yi-HCMilling (Guilin Hongcheng), umenzi we-izinto ze-anode umshini wokugaya.

01 indawo ethile yobuso

Kubhekisela endaweni engaphezulu yento ngeyunithi ngayinye. Uma inhlayiya incane, indawo ethile engaphezulu iba nkulu.

I-electrode engemihle enezinhlayiya ezincane kanye nendawo ephezulu yobuso ineziteshi eziningi nezindlela ezimfushane zokufuduka kwe-lithium ion, futhi ukusebenza kwesilinganiso kungcono. Kodwa-ke, ngenxa yendawo enkulu yokuxhumana ne-electrolyte, indawo yokwakha ifilimu ye-SEI nayo inkulu, futhi ukusebenza kahle kokuqala kuzokwehla. . Izinhlayiya ezinkulu, ngakolunye uhlangothi, zinenzuzo yobuningi obukhulu bokuxinana.

Indawo ethile yobuso bezinto ze-graphite anode kungcono ibe ngaphansi kuka-5m2/g.

02 Ukusatshalaliswa kosayizi wezinhlayiya

Ithonya lobukhulu bezinhlayiya zezinto ze-graphite anode ekusebenzeni kwazo kwe-electrochemical ukuthi ubukhulu bezinhlayiya zezinto ze-anode buzothinta ngqo ubuningi bempompi yezinto kanye nendawo ethile yobuso bezinto.

Ubukhulu bomthamo wompompi buzothinta ngqo ubukhulu bamandla evolumu wezinto ezibonakalayo, futhi ukusatshalaliswa kosayizi wezinhlayiya ezifanele kuphela kwezinto ezibonakalayo okungakhulisa ukusebenza kwezinto ezibonakalayo.

03 Ubuningi Bokuthepha

Ubuningi bempompi buyisisindo ngeyunithi ngayinye esilinganiswa ngokudlidliza okwenza impuphu ivele ngendlela yokupakisha eqinile. Kuyinkomba ebalulekile yokulinganisa izinto ezisebenzayo. Ubuningi bebhethri le-lithium-ion bunqunyelwe. Uma ubuningi bempompi buphezulu, izinto ezisebenzayo ngeyunithi ngayinye zinobunzima obukhulu, futhi umthamo wevolumu uphezulu.

04 Ukuqina Kokuxinana

Ubuningi bokuxinana bungobengxenye yepole, okubhekisela ekuxinaneni ngemva kokugingqika ngemva kokuba izinto ezisebenzayo ze-electrode engalungile futhi i-binder yenziwe ibe yingxenye yepole, ubuningi bokuxinana = ubuningi bendawo / (ubukhulu bengxenye yepole ngemva kokugingqika bususwa ekuxinaneni kwe-foil yethusi).

Ubuningi bokuxinana buhlobene eduze nomthamo weshidi elithile, ukusebenza kahle, ukumelana kwangaphakathi kanye nokusebenza komjikelezo webhethri.

Izici ezithonya ubuningi bokuxinana: usayizi wezinhlayiya, ukusatshalaliswa kanye nesimo sezinto zonke zinomthelela.

05 Ubuningi Beqiniso

Isisindo sento eqinile ngeyunithi ngayinye yevolumu yezinto ezisesimweni esiminyene ngokuphelele (ngaphandle kwezikhala zangaphakathi).

Njengoba ubuningi beqiniso bulinganiswa esimweni esihlanganisiwe, buzoba phezulu kunobuningi obuhlanganisiwe. Ngokuvamile, ubuningi beqiniso > ubuningi obuhlanganisiwe > ubuningi obuhlanganisiwe.

06 Ukushaja kokuqala kanye nomthamo othize wokukhipha

Izinto ze-graphite anode zinamandla angaguquki emjikelezweni wokuqala wokushaja nokukhipha i-charge. Ngesikhathi senqubo yokuqala yokushaja yebhethri le-lithium-ion, ubuso bezinto ze-anode buhlanganiswa nama-ion e-lithium futhi ama-molecule e-solvent ku-electrolyte afakwa ndawonye, ​​​​futhi ubuso bezinto ze-anode buyabola ukuze kwakhiwe i-SEI. Ifilimu yokudlulisa. Kuphela ngemva kokuba ubuso be-electrode engemihle bumbozwe ngokuphelele yifilimu ye-SEI, ama-molecule e-solvent awakwazanga ukuhlangana, futhi ukusabela kwamiswa. Ukukhiqizwa kwefilimu ye-SEI kudla ingxenye yama-ion e-lithium, futhi le ngxenye yama-ion e-lithium ayikwazi ukukhishwa ebusweni be-electrode engemihle ngesikhathi senqubo yokukhipha, ngaleyo ndlela kubangele ukulahlekelwa kwamandla okungaguquki, ngaleyo ndlela kuncishiswe amandla athile okukhishwa kokuqala.

07 Ukusebenza Kahle Kokuqala Kwe-Coulomb

Isibonakaliso esibalulekile sokuhlola ukusebenza kwezinto ze-anode ukusebenza kahle kokuqala kokushaja nokukhipha i-charge, okwaziwa nangokuthi ukusebenza kahle kwe-Coulomb kokuqala. Okokuqala ngqa, ukusebenza kahle kwe-Coulombic kunquma ngqo ukusebenza kwezinto ze-electrode.

Njengoba ifilimu ye-SEI yakheka kakhulu phezu kwezinto ze-electrode, indawo ethile yobuso bezinto ze-electrode ithinta ngqo indawo yokwakheka kwefilimu ye-SEI. Uma indawo ethile yobuso inkulu, indawo yokuxhumana ne-electrolyte inkulu futhi indawo enkulu yokwakha ifilimu ye-SEI.

Ngokuvamile kukholelwa ukuthi ukwakheka kwefilimu ye-SEI ezinzile kuzuzisa ekushajeni nasekukhipheni ibhethri, kanti ifilimu ye-SEI engazinzile ayilungele ukusabela, okuzoqhubeka nokudla i-electrolyte, kuqinise ukujiya kwefilimu ye-SEI, futhi kwandise ukumelana kwangaphakathi.

08 Ukusebenza komjikelezo

Ukusebenza komjikelezo webhethri kubhekisela enanini lamacala kanye nokukhishwa kwebhethri okubhekana nalo ngaphansi kohlelo oluthile lokushaja kanye nokukhishwa lapho amandla ebhethri ehla aye enanini elithile. Ngokuphathelene nokusebenza komjikelezo, ifilimu ye-SEI izovimbela ukusabalala kwama-ion e-lithium ngezinga elithile. Njengoba inani lemijikelezo landa, ifilimu ye-SEI izoqhubeka nokuwa, iqhekeze, futhi ibeke phezu kwe-electrode engemihle, okuholela ekukhuleni kancane kancane kokumelana kwangaphakathi kwe-electrode engemihle, okuletha ukushisa Ukuqongelela kanye nokulahlekelwa amandla.

09 Ukwandiswa

Kukhona ubudlelwano obuhle phakathi kokunwebeka nokuphila komjikelezo. Ngemva kokuba i-electrode engemihle inwebekile, okokuqala, umongo ogoqayo uzophazamiseka, izinhlayiya ze-electrode engemihle zizokwakha imifantu emincane, ifilimu ye-SEI izophuka futhi ihlelwe kabusha, i-electrolyte izosetshenziswa, futhi ukusebenza komjikelezo kuzowohloka; okwesibili, i-diaphragm izocindezelwa. Ukucindezela, ikakhulukazi ukuphuma kwe-diaphragm emaphethelweni e-angle yesokudla yendlebe ye-pole, kukhulu kakhulu, futhi kulula ukubangela i-micro-short circuit noma i-micro-metal lithium precipitation ngokuqhubeka komjikelezo wokukhipha ishaja.

Ngokuphathelene nokwanda ngokwako, ama-ion e-lithium azofakwa esikhaleni se-graphite interlayer ngesikhathi senqubo yokuhlangana kwe-graphite, okuholela ekwandeni kwesikhala se-interlayer kanye nokwanda kwevolumu. Le ngxenye yokwandisa ayinakuguqulwa. Inani lokwanda lihlobene nezinga lokuqondiswa kwe-electrode engemihle, izinga lokuqondiswa = I004/I110, elingabalwa kusukela kudatha ye-XRD. Izinto ze-graphite ze-anisotropic zivame ukudlula ekwandisweni kwe-lattice ohlangothini olufanayo (isiqondiso se-C-axis sekristalu ye-graphite) ngesikhathi senqubo yokuhlangana kwe-lithium, okuzoholela ekwandeni kwevolumu enkulu yebhethri.

10Linganisa ukusebenza

Ukusabalala kwama-ion e-lithium ezintweni ze-graphite anode kunesiqondiso esinamandla, okungukuthi, kungafakwa kuphela ngokuqondene nobuso bokugcina be-C-axis yekristalu ye-graphite. Izinto ze-anode ezinezinhlayiya ezincane nendawo ephezulu yobuso zisebenza kangcono ngesivinini. Ngaphezu kwalokho, ukumelana kobuso be-electrode (ngenxa yefilimu ye-SEI) kanye nokuqhuba kwe-electrode nakho kuthinta ukusebenza kwesivinini.

Njengoba kunjalo ngokuphila komjikelezo kanye nokwanda, i-electrode engemihle ye-isotropic ineziteshi eziningi zokuthutha ze-lithium ion, ezixazulula izinkinga zokungena okuncane kanye namazinga aphansi okusabalalisa esakhiweni se-anisotropic. Iningi lezinto lisebenzisa ubuchwepheshe obufana ne-granulation kanye ne-coating ukuthuthukisa ukusebenza kwazo kwezinga.

I-HCMilling (Guilin Hongcheng) ingumkhiqizi wemishini yokugaya izinto ze-anode.Uchungechunge lwe-HLMXizinto ze-anode kakhulu-isigayo esiqondile esihle, I-HCHizinto ze-anode umshini wokugaya omuhle kakhulukanye nezinye izigayo zokugaya i-graphite ezikhiqizwe yithi ziye zasetshenziswa kabanzi ekukhiqizweni kwezinto ze-graphite anode. Uma unezidingo ezihlobene, sicela usithinte ukuze uthole imininingwane yemishini futhi usinikeze ulwazi olulandelayo:

Igama lezinto ezingavuthiwe

Ubucwebe bomkhiqizo (i-mesh/μm)

umthamo (t/h)