Yikuphi ukuthuthuka kanye nokwenza ngcono okudingeka kwenziwe ekusebenzeni kwe-graphitized petroleum coke?

Ukuze kuhlangatshezwane nezidingo zamabhethri e-lithium-ion asebenza kahle kakhulu esizukulwaneni esilandelayo, i-graphitized petroleum coke idinga ukuthuthukiswa kokusebenza kwesilinganiso, ukuzinza komjikelezo, ukusebenza kwezinga lokushisa eliphansi, amandla esakhiwo, ukusebenza kahle kokuqala, kanye nokusebenza kahle kwezindleko ngokwezinqubo zokukhiqiza. Ukuhlaziywa okuqondile kungokulandelayo:

I. Ukuthuthukisa Ukusebenza Kwezinga Nokuzinza Kwemijikelezo

Inkinga: Ngesikhathi sezinqubo zokushaja nokukhipha, ukufakwa nokukhishwa kwama-ion e-lithium ku-graphitized petroleum coke kungabangela ukwanda nokuncipha kwezingqimba ze-graphite. Ngokuhamba kwesikhathi eside, lokhu kungaholela ekulimaleni kwesakhiwo, kuthinte ukuzinza komjikelezo. Iziqondiso Zokuthuthukisa:

• Ukuhlelwa Kabusha Kwesakhiwo Sezinhlayiyana: Khetha izinto ezisetshenziswayo ze-needle coke ezifanele bese usebenzisa izinto ezisebenziseka kalula njenge-pitch njengemithombo yekhabhoni yezihlanganisi. Ngokuphatha lezi zinto esithandweni esijikelezayo, izinhlayiya eziningana ze-needle coke zingahlanganiswa ndawonye ukuze zakhe izinhlayiya zesibili ezinobukhulu bezinhlayiyana ezifanele, kulandelwe yi-graphitization. Le ndlela yehlisa ngempumelelo inkomba yokuqondiswa kwekristali yezinto (inani le-OI) futhi ithuthukise indlela yokusabalalisa yama-ion e-lithium, ngaleyo ndlela ithuthukise ukusebenza kwezinga.
• Ukuguqulwa Kokumbozwa Komphezulu: I-coke ye-petroleum ehlanganiswe ne-coat graphitized ngezinto ezifana ne-carbon amorphous, ama-oxide ensimbi, noma ama-polymer ukwakha izinhlayiya ezakhiwe “njenge-core-shell”. Ingqimba yokumboza ingahlukanisa ukuxhumana okuqondile ne-electrolyte, inciphise izindawo ezisebenzayo zomphezulu, yehlise indawo ethile yobuso, futhi ngasikhathi sinye ithuthukise amandla okufaka nokusabalalisa ama-ion e-lithium, ngaleyo ndlela ithuthukise ukuzinza komjikelezo.

II. Ukuthuthukisa Ukusebenza Kwezinga Lokushisa Eliphansi

Inkinga: Ezindaweni ezinokushisa okuphansi, izinga lokusabalala kwama-ion e-lithium ku-graphitized petroleum coke liyancipha, okuholela ekwehleni kokusebenza kwebhethri. Iziqondiso Zokuthuthukisa:

• Ukufaka i-doping nge-Soft Carbon: Ukufaka ingxenye ethile ye-soft carbon ku-graphite anode kungathuthukisa ukusebenza kokushaja kwebhethri ekushiseni okuphansi. I-soft carbon inesakhiwo esingaguquki esinesikhala esikhulu phakathi kwezingqimba kanye nokuhambisana okuhle ne-electrolyte, okuholela ekusebenzeni okuhle kakhulu ekushiseni okuphansi. Kodwa-ke, isilinganiso se-doping kufanele silawulwe ngokucophelela ukuze kulinganiswe ukusebenza kwezinga lokushisa eliphansi kanye nokuphila komjikelezo.
• Ukuthuthukisa Ukwakheka Kwe-Electrolyte: Lungisa ukwakheka kwe-electrolyte ngokungeza izithasiselo ezintsha noma ukushintsha ukwakheka kwe-solvent ukuze unciphise i-viscosity ye-electrolyte emazingeni okushisa aphansi futhi uthuthukise izinga lokusabalala kwama-ion e-lithium.

III. Ukuthuthukisa Amandla Nokuzinza Kwesakhiwo

Inkinga: Izinto zekhabhoni ezine-graphit ephezulu, yize zinamandla aphezulu kanye namapulatifomu okukhipha amashaja azinzile, zingase zibonise ukusebenza kahle komjikelezo kanye nokusebenza kahle kokushisa okuphansi. Iziqondiso Zokuthuthukisa:

• Ukulawula Izinga Lokubala: Ngesikhathi senqubo yokwenza i-graphitization, izinga lokwenziwa kwe-graphitization kufanele lilawulwe ukuze kugcinwe izakhiwo ezithile ezingafani phakathi kwama-microcrystals, ngaleyo ndlela kugcinwe izinga elithile lamandla esakhiwo.
• Ukwethula Izakhiwo Ezincane: Ngokwakha izakhiwo ezincane noma izakhiwo ezinezimbobo, inani leziteshi zokufaka nezokukhipha ama-ion e-lithium lingandiswa, okuthuthukisa ukuzinza kwesakhiwo sezinto.

IV. Ukuthuthukisa Ukusebenza Kahle Kokuqala kanye Nokunciphisa Izindleko

Inkinga: Njengezinto ze-anode, i-graphitized petroleum coke ingabonisa ukusebenza kahle kokuqala okuphansi kanye nezindleko zokukhiqiza eziphezulu. Iziqondiso Zokuthuthukisa:

• Ukwelashwa Kokunamathela Komphezulu: Phatha i-petroleum coke ene-graphitized ngesisombululo se-oxidizing agent esinamandla ukuze unamathele futhi unciphise amandla asebenzayo omhlaba futhi unciphise amaqembu asebenzayo, ngaleyo ndlela uthuthukise ukusebenza kahle kokuqala.
• Ukuthuthukisa Izinqubo Zokukhiqiza: Thuthukisa izinqubo zokukhiqiza ezifana ne-calcination kanye ne-graphitization ukuze kuncishiswe izindleko zokukhiqiza futhi kuthuthukiswe ukusebenza kahle kokukhiqiza.