Impembelelo yolawulo lobushushu ngexesha lenkqubo ye-graphitization ekusebenzeni kwe-electrode ingashwankathelwa ngala manqaku aphambili alandelayo:
1. Ulawulo lobushushu luchaphazela ngokuthe ngqo iGraphitization Degree kunye neCrystal Structure
Ukuphuculwa kweGraphitization Degree: Inkqubo yegraphitization ifuna amaqondo obushushu aphezulu (ngesiqhelo aqala kwi-2500°C ukuya kwi-3000°C), apho ii-athomu zekhabhoni zihlengahlengisa ngokutsha ngokungcangcazela kobushushu ukuze zenze isakhiwo esicwangcisiweyo segraphite. Ukuchaneka kolawulo lobushushu kunefuthe ngqo kwiqondo legraphitization:
- Ubushushu obuphantsi (<2000°C): Iiathom zekhabhoni zihlala zicwangciswe kakuhle kwisakhiwo esineeleya ezingalungelelananga, nto leyo ebangela ukuba igrafu ibe sezantsi. Oku kukhokelela ekungaqhubi kakuhle kombane, ekuqhubisweni kobushushu, kunye namandla oomatshini e-electrode.
- Ubushushu obuphezulu (ngaphezulu kwe-2500°C): Iiathom zekhabhoni zihlengahlengisa ngokupheleleyo, nto leyo ekhokelela ekwandeni kobukhulu bee-microcrystals ze-graphite kunye nokunciphisa isithuba phakathi kweeleya. Ulwakhiwo lwekristale luba lugqibelele ngakumbi, ngaloo ndlela luphucula ukuhanjiswa kombane kwe-electrode, uzinzo lweekhemikhali, kunye nobomi bomjikelo.
Ukuphucula iiParameters zeCrystal: Uphando lubonisa ukuba xa ubushushu begraphitization budlula i-2200°C, iplateau enokubakho ye-needle coke iba nozinzo ngakumbi, kwaye ubude beplateau buhambelana kakhulu nokwanda kobukhulu be-graphite microcrystal, nto leyo ebonisa ukuba amaqondo obushushu aphezulu akhuthaza ukulandelelana kwesakhiwo sekristale.
2. Ulawulo lobushushu luchaphazela ukungcola kunye nobunyulu
Ukususwa kokungcola: Ngexesha lesigaba sokufudumeza esilawulwa ngokungqongqo kumaqondo obushushu aphakathi kwe-1250°C kunye ne-1800°C, izinto ezingezizo iikhabhoni (ezifana ne-hydrogen kunye neoksijini) ziyaphuma njengeegesi, ngelixa ii-hydrocarbons ezinobunzima obuphantsi beemolekyuli kunye namaqela okungcola zibola, nto leyo enciphisa umxholo wokungcola kwi-electrode.
Ulawulo lweZinga lokuFudumeza: Ukuba izinga lokuFudumeza likhawuleza kakhulu, iigesi eziveliswa kukubola kokungcola zinokubanjwa, nto leyo ekhokelela kwiziphene zangaphakathi kwi-electrode. Ngokwahlukileyo koko, izinga lokuFudumeza elicothayo linyusa ukusetyenziswa kwamandla. Ngokwesiqhelo, izinga lokuFudumeza kufuneka lilawulwe phakathi kwama-30°C/h kunye nama-50°C/h ukulinganisela ukususwa kokungcola kunye nolawulo loxinzelelo lobushushu.
Ukuphucula Ubumsulwa: Kumaqondo obushushu aphezulu, ii-carbides (ezifana ne-silicon carbide) ziyabola zibe ngumphunga wesinyithi kunye ne-graphite, nto leyo enciphisa ngakumbi umxholo wokungcola kwaye iphucula ubumsulwa be-electrode. Oku, ngakolunye uhlangothi, kunciphisa iimpembelelo ezingalindelekanga ngexesha lemijikelo yokukhupha itshaja kwaye kwandisa ubomi bebhetri.
3. Ulawulo lobushushu kunye ne-Electrode Microstructure kunye neProperties zomphezulu
Isakhiwo seMicro: Ubushushu begraphitization buchaphazela imo yeenxalenye kunye nefuthe lokubopha le-electrode. Umzekelo, i-needle coke esekwe kwioyile enyangwa kumaqondo obushushu aphakathi kwe-2000°C kunye ne-3000°C ayibonisi kuchithwa komphezulu weenxalenye kunye nokusebenza kakuhle kwe-binder, okwenza isakhiwo sesibini seenxalenye esizinzileyo. Oku kwandisa iziteshi zokudibanisa i-lithium-ion kwaye kuphucula uxinano lokwenyani kunye noxinano lwe-tap ye-electrode.
Iipropati Zomphezulu: Unyango lobushushu obuphezulu lunciphisa iziphene zomphezulu kwi-electrode, lunciphisa indawo ethile yomphezulu. Oku, kunciphisa ukubola kwe-electrolyte kunye nokukhula okugqithisileyo kwefilimu ye-solid electrolyte interphase (SEI), kunciphisa ukumelana kwangaphakathi kwebhetri kunye nokuphucula ukusebenza kakuhle kokukhupha itshaja.
4. Ulawulo lobushushu lulawula ukusebenza kwee-electrode nge-electrochemical
Indlela Yokugcina I-Lithium: Ubushushu be-graphitization buchaphazela isithuba phakathi kwe-interlayer kunye nobukhulu be-graphite microcrystals, ngaloo ndlela bulawula indlela yokuziphatha kwe-intercalation/deintercalation yee-ion ze-lithium. Umzekelo, i-needle coke ephathwe kwi-2500°C ibonisa i-plateau ezinzileyo ngakumbi kunye nomthamo ophezulu wokugcina i-lithium, okubonisa ukuba amaqondo obushushu aphezulu akhuthaza ukugqibelela kwesakhiwo se-graphite crystal kwaye aphucula ukusebenza kwe-electrochemical ye-electrode.
Uzinzo lweCycle: Ukwenziwa kwegraphitization yobushushu obuphezulu kunciphisa utshintsho lwevolumu kwi-electrode ngexesha lemijikelo yokukhupha itshaja, kunciphisa ukudinwa koxinzelelo kwaye ngaloo ndlela kuthintele ukwakheka kunye nokwanda kweentanda, nto leyo eyandisa ubomi bomjikelo webhetri. Uphando lubonisa ukuba xa ubushushu begraphitization bunyuka ukusuka kwi-1500°C ukuya kwi-2500°C, uxinano lokwenyani lwegraphite yokwenziwa lunyuka ukusuka kwi-2.15 g/cm³ ukuya kwi-2.23 g/cm³, kwaye uzinzo lwemijikelo luphucuka kakhulu.
5. Ulawulo lobushushu kunye nokuzinza kobushushu be-electrode kunye nokhuseleko
Uzinzo lobushushu: Ukwenziwa kwegrafiti yobushushu obuphezulu kuphucula ukumelana ne-oxidation ye-electrode kunye nokuzinza kobushushu. Umzekelo, ngelixa umda wobushushu be-oxidation wee-electrode zegrafiti emoyeni ungama-450°C, ii-electrode eziphantsi konyango lobushushu obuphezulu zihlala zizinzile kubushushu obuphezulu, nto leyo enciphisa umngcipheko wokubaleka kobushushu.
Ukhuseleko: Ngokwenza ngcono ulawulo lobushushu, uxinzelelo lwangaphakathi lobushushu kwi-electrode lunokunciphisa, kuthintelwe ukwakheka kweentanda kwaye ngaloo ndlela kuncitshiswe iingozi zokhuseleko kwiibhetri phantsi kweemeko zobushushu obuphezulu okanye zokutshaja kakhulu.
Amaqhinga oLawulo loBushushu kwiZicelo eziSebenzayo
Ukufudumeza okunezigaba ezininzi: Ukusebenzisa indlela yokufudumeza ngokwezigaba (njengokufudumeza kwangaphambili, ukwenziwa kwekhabhoni, kunye namanqanaba okuguqula igrafu), kunye namazinga ahlukeneyo okufudumeza kunye namaqondo obushushu amiselwe kwinqanaba ngalinye, kunceda ukulinganisela ukususwa kokungcola, ukukhula kwekristale, kunye nolawulo loxinzelelo lobushushu.
Ulawulo lweMozulu: Ukwenza i-graphitization kwigesi engasebenziyo (njenge-nitrogen okanye i-argon) okanye ukunciphisa igesi (njenge-hydrogen) emoyeni kuthintela i-oxidation yezinto zekhabhoni ngelixa kukhuthaza ukulungelelaniswa kwakhona kweeathom zekhabhoni kunye nokwenziwa kwesakhiwo segrafiti.
Ulawulo lweNqanaba lokuPholisa: Emva kokuba i-graphitization igqityiwe, i-electrode kufuneka ipholiswe kancinci ukuze kuthintelwe ukuqhekeka kwezinto okanye ukuguquka okubangelwa kukutshintsha kobushushu ngequbuliso, ukuqinisekisa ukuthembeka kunye nokuzinza kokusebenza kwe-electrode.
Ixesha leposi: Julayi-15-2025