Ziziphi izinto eziphambili ezifunekayo kwi-index yeemfuno ze-graphitized petroleum coke kwiindawo ezahlukeneyo zokusetyenziswa (ezifana ne-lithium battery anodes kunye ne-cathodes ze-aluminium)?

Iimfuno zeDivergent Index zeGraphitized Petroleum Coke kwiinkalo ezimbini ezibalulekileyo zokusetyenziswa: iiLithium-ion Battery Anodes kunye neeAluminium Cathodes

Iimfuneko zesalathisi se-graphitized petroleum coke zibonisa umahluko omkhulu kulwakhiwo lweekhemikhali, ulwakhiwo lomzimba, kunye nokusebenza kwe-electrochemical kwii-anode zebhetri ye-lithium-ion kunye nee-cathodes ze-aluminium. Izinto eziphambili zishwankathelwe ngolu hlobo lulandelayo:

I. Ii-Anode zeBhetri yeLithium-ion: Ukusebenza kwe-Electrochemical njengeCore, kunye nokuzinza kwesakhiwo okuqwalaselwayo

1. Umxholo weSulfur ophantsi (<0.5%)
   Iintsalela zesalfure zinokubangela ukuxinana kwekristale kunye nokwanda ngexesha le-graphitization, nto leyo ebangela ukwaphuka kwe-electrode. Ukongeza, isalfure inokukhupha iigesi kumaqondo obushushu aphezulu, yonakalise ifilimu ye-solid electrolyte interphase (SEI) kwaye ikhokelele ekulahlekelweni kwamandla okungenakuguqulwa. Umzekelo, i-GB/T 24533-2019 iyalela ulawulo oluqinileyo lomxholo wesalfure kwi-graphite esetyenziswa kwii-anode zebhetri ye-lithium-ion.
2. Umxholo wothuthu ophantsi (≤0.15%)
   Ukungcola kwesinyithi kuthuthu (umz., isodiyam, isinyithi) kukhuthaza ukubola kwe-electrolyte, okukhawulezisa ukubola kwebhetri. Ukungcola kwe-sodiyam kunokubangela ukubola kwe-anode honeycomb, kunciphisa ubomi bomjikelo. I-graphite ecocekileyo kakhulu ifuna inkqubo "ephezulu kathathu" (ubushushu obuphezulu, uxinzelelo oluphezulu, izinto ezikrwada ezicocekileyo kakhulu) ukunciphisa umxholo wothuthu ngaphantsi kwe-0.15%.
3. Ulungelelwaniso oluPhezulu lweCrystallinity kunye ne-Oriented
   • Uxinano Oluphezulu Lwenene: Lubonakalisa ubukrelekrele begrafiti; uxinano oluphezulu lwenene luqinisekisa imijelo ecwangcisiweyo yokufaka/ukukhupha i-lithium-ion, nto leyo ephucula ukusebenza kwesantya.
   • I-Coefficient Yokwandisa Ubushushu Ephantsi: I-Needle coke, enesakhiwo sayo esine-fibrous, ibonisa i-coefficient yokwandisa ubushushu esezantsi ngama-30% kune-sponge coke, nto leyo enciphisa ukwanda komthamo ngexesha lemijikelo yokutshaja/yokukhupha (umz., i-anisotropic graphite iyakhula ecaleni kwe-C-axis, nto leyo ebangela ukudumba kwebhetri).
4. Ubungakanani beenxalenye ezilinganayo kunye nendawo ethile yomphezulu
   • Ukusasazwa koBukhulu beeNgcawu eziBanzi: Iiparameter ze-D10, D50, kunye ne-D90 ezilungiselelweyo zivumela amasuntswana amancinci ukuba azalise izithuba phakathi kwezona zikhulu, nto leyo ephucula uxinano lweempompo (uxinano oluphezulu lweempompo lunyusa umthwalo wezinto ezisebenzayo ngeyunithi nganye, nangona amanqanaba aphezulu ehlisa ukumanzisa kwe-electrolyte).
   • Indawo Ephakathi Ethile Yomphezulu: Indawo ephezulu ethile (>10 m²/g) ifinyeza iindlela zokufuduka kwe-lithium-ion, inyusa ukusebenza kwesantya, kodwa yandisa indawo yefilimu ye-SEI, inciphisa ukusebenza kakuhle kwe-coulombic yokuqala (ICE).
5. Ukusebenza kakuhle kweCoulombic yokuqala (≥92.6%)
   Ukunciphisa ukusetyenziswa kwe-lithium ngexesha lokwenziwa kwe-SEI ngexesha lomjikelo wokuqala wokutshaja/wokukhupha umbane kubalulekile ekugcineni uxinano lwamandla aphezulu. Imigangatho ifuna amandla okuqala okukhupha umbane angama-≥350.0 mAh/g kunye ne-ICE engama-≥92.6%.

II. IiCathode zeAluminiyam: Ukuqhuba kunye nokumelana nobushushu njengezinto eziphambili

1. Ulawulo loMxholo weSulfur oHleliweyo
   • I-Low-sulfur Coke (S < 0.8%): Isetyenziswa kwii-electrodes ze-graphite ze-premium ukuthintela ukudumba kwegesi okubangelwa yi-sulfur kunye nokuqhekeka ngexesha lokwenza intsimbi, ukunciphisa ukusetyenziswa kwentsimbi ngetoni nganye (umz., ishishini elinye linciphise ukusetyenziswa kwe-anode nge-12% kusetyenziswa i-low-sulfur coke).
   • I-Medium-sulfur Coke (S 2%–4%): Ifanelekile kwii-anodes ze-aluminium electrolysis, iindleko zokulinganisela kunye nokusebenza.
2. Ukunyamezela Uthuthu Oluphezulu (kunye noLawulo Olukhethekileyo Lokungcola)
   Umxholo weVanadium kuthuthu kufuneka ube yi-≤0.03% ukuze kuthintelwe ukwehla rhoqo kokusebenza kakuhle kwe-aluminium electrolysis current. Ukungcola kwe-sodium kufuna ulawulo olungqongqo ukuze kuthintelwe i-anode honeycomb oxidation.
3. Ukuqina okuphezulu kwekristale kunye nokumelana nobushushu
   I-Needle coke ikhethwa ngenxa yesakhiwo sayo esine-fibrous, esinika uxinano oluphezulu, amandla, ukuncitshiswa okuphantsi, kunye nokumelana okuhle kakhulu nokutsha kobushushu, okwenza ukuba ikwazi ukumelana nokuguquguquka rhoqo kobushushu ngexesha le-aluminium electrolysis. I-coefficient yokwandisa ubushushu ephantsi inciphisa umonakalo wesakhiwo, yandisa ubomi be-cathode.
4. Ubungakanani beenxalenye kunye namandla oomatshini
   • Iinxalenye zeLump ezikhethwayo: Zinciphisa umxholo we-powder coke ukuthintela ukuqhekeka ngexesha lokuthuthwa kunye ne-calcination, ukuqinisekisa ukuqina koomatshini.
   • Inxalenye Ephezulu yeCalcined Coke: I-70% yeCalcined Coke isetyenziswa kwi-aluminium electrolysis anodes ukuphucula ukuhanjiswa kwegesi kunye nokumelana nokugqwala.
5. Ukuqhuba koMbane okuphezulu
   Ii-electrode ze-needle coke zinokuthwala i-100,000 A currents, zifikelela ekusebenzeni kakuhle kwentsimbi kwemizuzu engama-25 ngesitovu ngasinye kunye nokuqhuba kombane okuphezulu ngokuphindwe kathathu kune-coke eqhelekileyo, nto leyo enciphisa kakhulu ukusetyenziswa kwamandla.

III. Isishwankathelo soMmahluko oPhambili

IV. Iindlela Zoshishino

• Ii-Anode zeBhetri yeLithium-ion: I-coke entsha eyakhiwe ngenyukliya (ubume be-radial) kunye ne-coke eguqulweyo ye-calcined (ephucula ubomi bomjikelo we-anode yekhabhoni eqinileyo) ziindawo ezitsala uphando ezisanda kuvela ukuze kuphuculwe ngakumbi uxinano lwamandla kunye nokusebenza komjikelo.
• IiCathodes zeAluminiyam: Imfuno ekhulayo yee-electrodes ezinkulu ze-needle coke ezingama-750 mm kunye ne-medium-sulfur coke yokugaya i-silicon carbide iqhubela phambili uphuhliso lwezinto ezisetyenziswayo ekuqhubeni amandla aphezulu kunye nokumelana nokuguguleka.