Yuav kom ua tau raws li qhov xav tau ntawm cov roj teeb lithium-ion tiam tom ntej, cov roj av coke graphitized xav tau kev txhim kho hauv kev ua haujlwm ntawm tus nqi, kev ruaj khov ntawm lub voj voog, kev ua haujlwm kub qis, lub zog ntawm cov qauv, kev ua haujlwm pib, thiab kev siv nyiaj tsim nyog hauv cov txheej txheem tsim khoom. Kev tshuaj xyuas tshwj xeeb yog raws li nram no:
I. Txhim kho Kev Ua Haujlwm ntawm Tus Nqi thiab Kev Ruaj Ntseg ntawm Lub Voj Voog
Teeb Meem: Thaum lub sijhawm them thiab tso tawm cov txheej txheem, kev ntxig thiab rho tawm cov lithium ions hauv graphitized petroleum coke tuaj yeem ua rau cov txheej graphite nthuav dav thiab sib zog. Yog tias lub voj voog mus ntev, qhov no yuav ua rau muaj kev puas tsuaj rau cov qauv, cuam tshuam rau kev ruaj khov ntawm lub voj voog. Cov Lus Qhia Txhim Kho:
- Kev Kho Dua Qauv Khoom Me Me: Xaiv cov khoom siv ua ntej uas siv koob coke thiab siv cov khoom siv uas yooj yim graphitizable xws li pitch ua cov pa roj carbon rau cov binders. Los ntawm kev kho cov khoom siv no hauv lub cub tawg rotary, ntau cov khoom me me uas siv koob coke tuaj yeem sib txuas ua ke los tsim cov khoom me me nrog cov qhov loj me uas tsim nyog, ua raws li graphitization. Txoj hauv kev no txo cov khoom siv crystallite orientation index (OI tus nqi) thiab txhim kho txoj kev diffusion rau lithium ions, yog li txhim kho kev ua tau zoo ntawm tus nqi.
- Kev Hloov Kho Txheej Nto: Txheej cov roj av graphitized nrog cov khoom siv xws li amorphous carbon, hlau oxides, lossis polymers los tsim cov khoom me me "core-shell". Cov txheej txheej tuaj yeem cais kev sib cuag ncaj qha nrog cov electrolyte, txo cov chaw ua haujlwm ntawm qhov chaw, txo qhov chaw tshwj xeeb ntawm qhov chaw, thiab tib lub sijhawm txhim kho lub peev xwm ntxig thiab diffusion ntawm lithium ions, yog li txhim kho kev ruaj khov ntawm lub voj voog.
II. Txhim kho Kev Ua Haujlwm Kub Qis
Teeb Meem: Hauv qhov chaw kub qis, qhov nrawm ntawm cov lithium ions hauv graphitized petroleum coke txo qis, ua rau kev ua haujlwm ntawm lub roj teeb poob qis. Cov Lus Qhia Txhim Kho:
- Kev Siv Cov Carbon Mos: Kev muab ib feem ntawm cov carbon mos rau hauv cov graphite anode tuaj yeem txhim kho lub roj teeb lub zog them thaum kub qis. Cov carbon mos muaj cov qauv amorphous nrog qhov sib nrug loj thiab sib haum zoo nrog cov electrolyte, ua rau muaj kev ua haujlwm kub qis zoo heev. Txawm li cas los xij, qhov piv ntawm kev siv cov tshuaj yuav tsum tau tswj hwm kom zoo kom sib npaug kev ua haujlwm kub qis thiab lub neej voj voog.
- Kev Txhim Kho Cov Qauv Electrolyte: Txhim kho cov qauv electrolyte los ntawm kev ntxiv cov khoom ntxiv tshiab lossis hloov cov kuab tshuaj kom txo cov electrolyte viscosity ntawm qhov kub qis thiab txhim kho qhov nrawm ntawm cov lithium ions.
III. Kev Txhim Kho Lub Zog thiab Kev Ruaj Ntseg ntawm Cov Qauv
Teeb Meem: Cov ntaub ntawv carbon uas muaj graphite ntau, txawm hais tias muaj peev xwm siab thiab cov platform them-tawm ruaj khov, tej zaum yuav ua rau muaj kev ua haujlwm tsis zoo thiab ua haujlwm kub qis. Cov Lus Qhia Txhim Kho:
- Kev Tswj Xyuas Qib Graphitization: Thaum lub sijhawm ua graphitization, qib ntawm graphitization yuav tsum tau tswj kom khaws qee cov qauv amorphous ntawm cov microcrystals, yog li tswj tau qee qib ntawm cov qauv muaj zog.
- Kev Taw Qhia Txog Nanostructures: Los ntawm kev tsim cov nanostructures lossis cov qauv porous, tus naj npawb ntawm cov channel ntxig thiab rho tawm rau lithium ions tuaj yeem nce ntxiv, txhim kho cov khoom siv lub zog ruaj khov.
IV. Kev Txhim Kho Kev Ua Haujlwm Thaum Pib thiab Txo Cov Nqi
Teeb Meem: Ua ib yam khoom siv anode, graphitized petroleum coke yuav ua rau pom tias nws ua haujlwm tau zoo thaum pib qis thiab cov nqi tsim khoom siab. Cov Lus Qhia Txhim Kho:
- Kev Kho Mob Oxidation ntawm Qhov Chaw: Kho cov roj av coke graphitized nrog cov tshuaj oxidizing muaj zog kom oxidize thiab passivate cov peev xwm ua haujlwm ntawm qhov chaw thiab txo cov pab pawg ua haujlwm, yog li txhim kho kev ua haujlwm thaum pib.
- Kev Txhim Kho Cov Txheej Txheem Tsim Khoom: Txhim kho cov txheej txheem tsim khoom xws li calcination thiab graphitization kom txo cov nqi tsim khoom thiab txhim kho kev ua haujlwm zoo.
Lub sijhawm tshaj tawm: Lub Kaum Hli-16-2025