Ndezvipi zvinonyanya kutariswa nezvinodiwa zve index ye graphitized petroleum coke munzvimbo dzakasiyana dzekushandisa (senge lithium battery anodes uye cathodes yealuminium)?

Zvinodiwa zveDivergent Index zveGraphitized Petroleum Coke muNzvimbo mbiri Dzakakosha dzeKushandisa: Lithium-ion Battery Anodes neAluminium Cathodes

Zvinodiwa zve graphitized petroleum coke zvinoratidza musiyano mukuru mukuumbwa kwemakemikari, chimiro chemuviri, uye mashandiro e electrochemical pakati pe lithium-ion battery anodes uye aluminium cathodes. Zvinhu zvakakosha zvinopfupikiswa seizvi:

I. Lithium-ion Battery Anodes: Electrochemical Performance seCore, neStructural St ...

1. Kuwanda kweSulfur (<0.5%)
   Zvisaririra zvesarufa zvinogona kukonzera kusimba kwekristaro uye kukura panguva yegirafiti, zvichikonzera kupwanyika kweelectrode. Uyezve, sarufa inogona kuburitsa magasi pakupisa kwakanyanya, zvichikuvadza firimu re solid electrolyte interphase (SEI) uye zvichikonzera kurasikirwa kwesimba kusingadzoreki. Semuenzaniso, GB/T 24533-2019 inorayira kudzora kwakasimba kwesarufa yegirafiti inoshandiswa mu lithium-ion battery anodes.
2. Kuwanda kweMadota (≤0.15%)
   Tsvina yesimbi iri mumadota (semuenzaniso, sodium, iron) inokonzera kuora kwe electrolyte, ichikurumidzisa kuora kwebhatiri. Tsvina ye sodium inogonawo kukonzera oxidation ye anode honeycomb, ichideredza hupenyu hwe cycle. Graphite yakachena kwazvo inoda maitiro e "three-high" (tembiricha yepamusoro, pressure yepamusoro, zvinhu zvakagadziriswa zvakanyanya) kuderedza huwandu hwedota huri pasi pe 0.15%.
3. Kurongeka Kwakakwirira Kwekristaro uye Kwakarongeka
   • Kuwanda Kwechokwadi: Kunoratidza graphite crystallinity; kuwanda kwechokwadi kwakanyanya kunovimbisa nzira dzakarongwa dzekuisa/kubvisa lithium-ion, zvichiwedzera kushanda kweraiti.
   • Kuwedzerwa Kwemafuta Asina Kupisa: Needle coke, ine chimiro chayo chefiber, inoratidza kuwedzera kwemafuta kwakaderera ne30% pane sponge coke, zvichideredza kuwedzera kwehuwandu panguva yekuchaja/kuburitsa (semuenzaniso, anisotropic graphite inokura ichitevedza C-axis, zvichikonzera kuzvimba kwebhatiri).
4. Saizi yezvikamu yakaenzana uye nzvimbo chaiyo yepamusoro
   • Kugoverwa kweSaizi yeZvidimbu Zvakakura: Maparamita eD10, D50, uye D90 akagadziridzwa anogonesa zvidimbu zvidiki kuzadza nzvimbo dziri pakati pezvakakura, zvichivandudza huwandu hwepombi (huwandu hwakawanda hwepombi hunowedzera mutoro wezvinhu zvinoshanda pahuwandu hweyuniti, kunyangwe huwandu hwakawanda huchideredza kunyorova kwe electrolyte).
   • Nzvimbo yePamusoro ine Pakati Nepakati: Nzvimbo yepamusoro (>10 m²/g) inopfupisa nzira dzekufamba kwe lithium-ion, zvichiwedzera kushanda kwemuchina, asi inowedzera nzvimbo yefirimu yeSEI, zvichideredza kushanda zvakanaka kwekutanga kwe coulombic (ICE).
5. Kushanda Kwakanyanya Kwekutanga kweCoulombic (≥92.6%)
   Kuderedza kushandiswa kwe lithium panguva yekuumbwa kweSEI panguva yekutanga yekuchaja/kuburitsa simba kwakakosha kuti pave nekuwanda kwesimba. Mitemo inoda simba rekutanga rekuburitsa simba ≥350.0 mAh/g uye ICE ≥92.6%.

II. Aluminium Cathodes: Kufambisa Kwemhepo uye Kuramba Kupisa Kwemhepo Sezvinhu Zvikuru Zvinokosheswa

1. Kudzora Zviri MuSulfur Zvakarongwa
   • Coke ine sarufa shoma (S < 0.8%): Inoshandiswa mumaelectrode epamusoro egrafiti kudzivirira kuzvimba kwegasi rinokonzerwa nesarufa uye kutsemuka panguva yekugadzira simbi, zvichideredza kushandiswa kwesimbi patani (semuenzaniso, kambani imwe chete yakaderedza kushandiswa kweanode ne12% ichishandisa coke ine sarufa shoma).
   • Coke yepakati-sulfur (S 2%–4%): Yakakodzera ma anode e electrolysis e aluminium, kuyera mutengo uye mashandiro.
2. Kushivirira Madota Akawanda (neKudzora Kusachena Kwakasiyana)
   Kuwanda kwevanadium mumadota kunofanira kunge kuri ≤0.03% kudzivirira kudzikira kwekushanda kwearuminiyamu electrolysis current. Kusvibiswa kwesodium kunoda kudzorwa kwakasimba kudzivirira anode honeycomb oxidation.
3. Kusimba Kwakanyanya uye Kuramba Kupisa Kwekupisa
   Needle coke inofarirwa nekuda kwechimiro chayo che fibrous, icho chinopa density yakakura, simba, ablation shoma, uye antithermal shock resistance yakanaka, zvichiita kuti ikwanise kutsungirira kuchinja-chinja kwekupisa nguva nenguva panguva ye aluminium electrolysis. Kuwanda kwekupisa kushoma kunoderedza kukuvara kwechimiro, zvichiita kuti cathode irambe iripo kwenguva refu.
4. Saizi yezvikamu uye Simba reMichina
   • Zvidimbu Zvinodiwa: Zvinoderedza huwandu hwe coke yeupfu kudzivirira kutyoka panguva yekutakura uye calcination, zvichiita kuti michina irambe yakasimba.
   • Chikamu Chakanyanya cheCalcined Coke: 70% calcined coke inoshandiswa mualuminium electrolysis anodes kuwedzera conductivity uye corrosion resistance.
5. Kufambisa Kwemagetsi Kwakanyanya
   Maelectrode e-needle coke anogona kutakura magetsi eA 100,000, zvichiita kuti simbi ishande zvakanaka kwemaminitsi makumi maviri nemashanu pachoto chimwe nechimwe uye conductivity yakapetwa katatu kupfuura coke yakajairika, zvichideredza zvakanyanya kushandiswa kwesimba.

III. Pfupiso yeMusiyano Mukuru

IV. Maitiro Eindasitiri

• Mabhatiri eLithium-ion Anodes: Coke itsva ine nucleus-structured (radial texture) uye pitch-modified calcined coke (inowedzera hupenyu hwe hard carbon anode cycle) inzvimbo dziri kutsvagurudza dziri kubuda kuti dziwedzere kuwedzera simba uye mashandiro e cycle.
• Aluminium Cathodes: Kudiwa kuri kukura kwema electrodes e 750 mm ane needle coke uye medium-sulfur coke ekukuya silicon carbide kuri kukurudzira kugadzirwa kwezvinhu kuti zvikwanise kufambisa mvura zvakanyanya uye kuti isaparare.