Menene muhimman abubuwan da ake mayar da hankali a kai na buƙatun ma'aunin man fetur na graphitized petroleum coke a fannoni daban-daban na aikace-aikace (kamar lithium battery anodes da cathodes for aluminum)?

Bukatun Ma'aunin Bambanci don Coke na Man Fetur Mai Graphitized a cikin Manyan Filaye Biyu na Aikace-aikace: Batir Lithium-ion Anodes da Aluminum Cathodes

Abubuwan da ake buƙata na ma'aunin man fetur mai siffar graphitized suna nuna bambance-bambance masu yawa a cikin abubuwan da ke cikin sinadarai, tsarin jiki, da kuma aikin lantarki a cikin anodes na batirin lithium-ion da cathodes na aluminum. An taƙaita muhimman abubuwan da suka fi muhimmanci kamar haka:

I. Batir Lithium-ion Anodes: Aikin Electrochemical a matsayin Core, tare da la'akari da Tsarin Daidaito

1. Ƙarancin sinadarin sulfur (<0.5%)
   Ragowar sulfur na iya haifar da ƙanƙantar lu'ulu'u da faɗaɗawa yayin graphitization, wanda ke haifar da karyewar lantarki. Bugu da ƙari, sulfur na iya sakin iskar gas a yanayin zafi mai yawa, yana lalata fim ɗin interphase mai ƙarfi (SEI) kuma yana haifar da asarar ƙarfin da ba za a iya jurewa ba. Misali, GB/T 24533-2019 ya ba da umarnin sarrafa abun cikin sulfur mai ƙarfi ga graphite da ake amfani da shi a cikin anodes na batirin lithium-ion.
2. Ƙarancin Toka (≤0.15%)
   Rashin tsaftar ƙarfe a cikin toka (misali, sodium, baƙin ƙarfe) yana haɓaka ruɓewar electrolyte, yana hanzarta lalata batirin. Rashin tsaftar sodium kuma yana iya haifar da iskar shaƙar zuma ta anode, yana rage tsawon lokacin zagayowar. Graphite mai tsabta yana buƙatar tsari mai "high-uku" (zafin jiki mai yawa, matsin lamba mai yawa, kayan aiki masu tsafta) don rage yawan toka ƙasa da 0.15%.
3. Babban kristal da Tsarin Daidaitacce
   • Babban Nauyin Gaskiya: Yana nuna lu'ulu'u na graphite; babban yawan gaske yana tabbatar da cewa an tsara tashoshi don saka/cire lithium-ion, yana haɓaka aikin gudu.
   • Ƙarancin Faɗaɗawar Zafi: Coke na allura, tare da tsarinsa na fiber, yana nuna ƙarancin faɗaɗawar zafi fiye da coke na soso da kashi 30%, yana rage faɗaɗar girma yayin zagayowar caji/fitar da ruwa (misali, anisotropic graphite yana faɗaɗa tare da axis na C, yana haifar da kumburin baturi).
4. Daidaitaccen Girman Barbashi da Yankin Fuskar Musamman
   • Rarraba Girman Barbashi Mai Faɗi: Sigogi na D10, D50, da D90 da aka inganta suna ba da damar ƙananan barbashi su cike gurɓatattun abubuwa tsakanin manyan, suna inganta yawan famfo (ƙarfin yawan famfo yana ƙara yawan kayan aiki a kowace ƙarar naúrar, kodayake matakan da suka wuce gona da iri suna rage yawan danshi na electrolyte).
   • Matsakaicin Yankin Fuska na Musamman: Babban yanki na musamman (>10 m²/g) yana rage hanyoyin ƙaura na lithium-ion, yana haɓaka aikin gudu, amma yana faɗaɗa yankin fim ɗin SEI, yana rage ingancin coulombic na farko (ICE).
5. Babban Ingancin Coulombic na Farko (≥92.6%)
   Rage yawan amfani da lithium a lokacin samuwar SEI a lokacin zagayen caji/fitar da kaya na farko yana da mahimmanci don kiyaye yawan kuzari mai yawa. Ka'idoji suna buƙatar ƙarfin fitarwa na farko ≥350.0 mAh/g da ICE ≥92.6%.

II. Kathodes na Aluminum: Tsarin watsawa da juriya ga girgizar zafi a matsayin manyan abubuwan da suka fi muhimmanci

1. Sarrafa Abubuwan da ke Cikin Sulfur Mai Ma'auni
   • Coke mai ƙarancin sulfur (S < 0.8%): Ana amfani da shi a cikin na'urorin lantarki masu ƙarfi na graphite don hana kumburin iskar gas da sulfur ke haifarwa yayin ƙera ƙarfe, yana rage yawan amfani da ƙarfe a kowace tan (misali, kamfani ɗaya ya rage yawan amfani da anode da kashi 12% ta amfani da ƙananan sulfur coke).
   • Coke mai matsakaicin sulfur (S 2%–4%): Ya dace da anodes na aluminum electrolysis, daidaita farashi da aiki.
2. Juriyar Toka Mai Yawan Juriya (tare da Takamaiman Kula da Tsabta)
   Dole ne sinadarin vanadium a cikin toka ya kasance ≤0.03% domin gujewa raguwar ingancin wutar lantarki ta aluminum electrolysis lokaci-lokaci. Dattin sodium yana buƙatar kulawa mai ƙarfi don hana iskar saƙar zuma ta anode.
3. Babban Crystallinity da Juriyar Girgizar Zafi
   An fi son allurar coke saboda tsarinta na fiber, wanda ke ba da babban yawa, ƙarfi, ƙarancin ablation, da kuma kyakkyawan juriya ga girgizar zafi, wanda ke ba shi damar jure yawan canjin zafi a lokacin electrolysis na aluminum. Ƙarancin haɓakar zafi yana rage lalacewar tsarin, yana tsawaita tsawon rayuwar cathode.
4. Girman Barbashi da Ƙarfin Inji
   • An Fi Soyayya da Ƙwayoyin Cuku: Yana rage yawan sinadarin coke na foda don hana karyewa yayin jigilar kaya da kuma cire sinadarin, wanda hakan ke tabbatar da ƙarfin injina.
   • Babban Kason Calcined Coke: Ana amfani da kashi 70% na calcined coke a cikin anodes na aluminum electrolysis don haɓaka watsawa da juriya ga tsatsa.
5. Babban Lantarki Mai Gudarwa
   Na'urorin lantarki na coke na allura na iya ɗaukar kwararar iskar A 100,000, wanda ke samar da ingancin yin ƙarfe na mintuna 25 a kowace tanda da kuma ƙarfin lantarki sau uku fiye da na coke na gargajiya, wanda hakan ke rage yawan amfani da makamashi sosai.

III. Takaitaccen Bayani Kan Bambancin Da Ya Shafi Muhimman Bayanai

IV. Yanayin Masana'antu

• Batir Lithium-ion Anodes: Sabbin coke mai tsari na nukiliya (nau'in radial) da coke mai calcined mai gyara (haɓaka rayuwar zagayowar carbon anode mai tauri) sune wuraren bincike da ke tasowa don ƙara inganta yawan kuzari da aikin zagayowar.
• Kathodes na Aluminum: Ƙara buƙatar manyan electrodes na coke na allura mai girman mm 750 da kuma matsakaiciyar coke na sulfur don niƙa silicon carbide yana haifar da haɓaka kayan aiki zuwa ga mafi girman juriya ga lalacewa da kuma juriya ga lalacewa.