Hais txog roj teeb tooj liab ntawv ci, peb yuav piav qhia ntau ntxiv txog kev txhim kho yav tom ntej thiab txheej txheem ntawm cov ntawv ci tooj liab.
Hauv cov roj teeb lithium-ion, cov khoom siv zoo thiab tsis zoo yog coated ntawm lub substrate los tsim cov ncej, thiab tom qab ntawd raug mob los yog stacked los ua ib lub roj teeb. Cov ntaub ntawv hauv paus siv ntawm no feem ntau suav nrog cov ntawv ci tooj liab thiab txhuas ntawv ci. Tam sim no lithium roj teeb cathode yog txhuas ntawv ci, thiab qhov tsis zoo electrode yog tooj liab ntawv ci. Qhov no yog vim tooj liab tau yooj yim oxidized nyob rau hauv qhov zoo electrode nrog lub peev xwm ntau dua, thiab qhov saum npoo ntawm aluminium ntawv ci muaj txheej ntom ntom. Cov txheej oxide tiv thaiv cov txhuas sab hauv ntawm qhov muaj peev xwm siab. Kab lus no feem ntau hais txog cov ntawv siv tooj liab uas siv rau qhov tsis zoo electrodes.
Tooj liab muaj lub zog txhua yam thiab zoo heev hluav taws xob conductivity. Nws cov ntsiab lus nyob rau hauv lub ntiaj teb crust yog hais txog 0.01%. Nws feem ntau muaj nyob rau hauv daim ntawv ntawm tooj liab ore nyob rau hauv cov xwm. Copper foil tuaj yeem muab faib ua electrolytic tooj liab thiab dov tooj liab raws li nws txoj kev tsim khoom sib txawv. Rolled tooj liab muaj zoo ductility thiab siab technical nyuaj nyob rau hauv ntau lawm. Nws qhov kev npaj yuav tsum muaj ntau cov txheej txheem thiab tus nqi siab. Muaj ob peb lub lag luam hauv tsev. Cov tuam txhab uas siv cov qauv no los tsim kom zoo suav nrog Olin Brass hauv Tebchaws Meskas, Nyiv Nippon Mining thiab lwm lub tuam txhab.
Tam sim no, feem ntau ntawm cov ntawv ci tooj liab siv nyob rau hauv cov roj teeb cell factories yog tsim los ntawm electrolysis. Xyoo 1922, Edison tau tsim txoj hauv kev txuas ntxiv electrolytic tooj liab ntawv ci thiab thov rau patent. Nws siv cov hlau tsis tu ncua tig rau hauv cov tooj liab sulfate electrolyte ua cov cathode thiab insoluble hlau li anode. Lub hnub yug ntawm txoj kev no tau cim qhov pib ntawm kev lag luam electrolytic tooj liab. Xyoo 1937, Anaconde Copper Factory hauv Tebchaws Meskas tau muab Edison patent rau hauv kev tsim khoom thiab ua tiav cov ntawv ci tooj liab electrolytic. Thoob plaws hauv keeb kwm ntawm txoj kev loj hlob ntawm electrolytic tooj liab ntawv ci, peb tuaj yeem pom tias nws yeej ib txwm ua raws li cov qauv ntawm cov ntawv luam tawm. Nrog rau daim ntawv thov loj ntawm lithium-ion roj teeb hauv cov neeg siv khoom siv hluav taws xob, electrolytic tooj liab ntawv ci tau raug coj mus rau hauv qhov chaw tshiab li anode. Cov khoom siv tam sim no, nrog rau lawv cov hluav taws xob zoo conductivity, tsis kam rau crushing thiab tus nqi qis, tau nce sai thiab siv rau ntawm qhov loj. Tam sim no nrog kev nce qib loj thiab kev siv lub zog tshiab tsheb, 5G thiab lub zog cia, qhov kev thov rau electrolytic tooj liab ntawv ci tau pom qhov tawg tshiab.
Txhawm rau txhawm rau txhawm rau ua kom lub zog ntim ntawm lub roj teeb tseem ceeb ntau npaum li qhov ua tau thaum ua kom muaj kev nyab xeeb, kev ua haujlwm ntawm lub voj voog, thiab lwm yam, tus tsim qauv ntawm lub roj teeb ntawm tes yuav tsum ntim cov khoom siv ntau dua rau hauv cov roj teeb tseem ceeb ntawm lub plhaub. Kuv xav tias yog qhov tsis zoo tam sim no cov khoom siv tooj liab tuaj yeem txhim kho hauv cov lus qhia hauv qab no yav tom ntej:
1. Ultra-nyias tooj liab ntawv ci: Cov qauv no yog tam sim no pom tseeb, los ntawm 8um mus rau 6um, thiab tam sim no mus rau 4.5um, uas qee cov tuam ntxhab tau qhia hauv cov khoom me me. Tej zaum cov ntawv ci tooj liab hauv qab 4um yuav raug txhawb rau kev tsim khoom loj yav tom ntej. Qhov kev ua haujlwm no tseem pom tseeb, uas yog txhawm rau txhawm rau nce qhov ntim thiab lub zog loj ntawm lub roj teeb tub ntxhais kom ntau li ntau tau, tab sis qhov no ua rau muaj kev xav tau ntau dua rau kev tsim cov ntawv ci tooj liab thiab cov txheej txheem tswj cov roj teeb core. Tom qab tag nrho, lub thinner ntawm cov ntawv ci tooj liab, qhov kev pheej hmoo ntawm kev tawg ntawm cov sawb thaum txheej txheej txheej kuj yog siab dua.
2. Perforated tooj liab ntawv ci: uas yog, los ntawm cov tshuaj corrosion, micropores yog tsim nyob rau saum npoo ntawm cov ntawv ci tooj liab kom txo tau qhov hnyav ntawm cov substrate thiab ua rau kom loj zog ceev ntawm lub roj teeb core. Nws yog ib qho tsim nyog los tswj qhov pore loj thiab optimize hom etchant. , ib qho yog los tiv thaiv lub pore txoj kab uas hla los ntawm qhov loj heev, ua rau nws nyuaj rau kev tswj ib leeg-txheej txheej slurry, thiab lwm yam yog los soj ntsuam qhov cuam tshuam ntawm residual etchant ntawm kev ua haujlwm ntawm lub roj teeb tseem ceeb, xws li kev ncig, roj ntau lawm. , lwm.
3 Txau cov ntawv ci tooj liab: Qhov no sib npaug rau ob sab tooj liab plating ntawm cov yas substrate. Qhov no tsis tsuas yog khaws cov kev ua haujlwm ntawm cov khoom siv hluav taws xob tam sim no, tab sis kuj txo qhov hnyav ntawm lub substrate thiab txhim kho lub zog loj ntawm lub roj teeb core. Txawm li cas los xij, thaum lub sijhawm tsim khoom, koj tuaj yeem ntsib cov txheej txheem nyuaj xws li kev nias txias thiab tab welding.
Raws li kev nkag mus ntawm cov tsheb tshiab lub zog tseem nce ntxiv, cov peev txheej tooj liab uas twb muaj lawm tau dhau los ua tsis txaus, thiab muaj qee qhov sib txawv ntawm cov khoom siv thiab kev thov. Nws cia siab tias kev lag luam tooj liab yuav maj mam nthuav ntau lawm yav tom ntej kom tau raws li kev lag luam xav tau rau cov roj teeb fais fab.
Kev npaj ntawm electrolytic tooj liab ntawv ci yog muab faib ua peb kauj ruam: tooj liab dissolution, raw foil thiab nto kho. Cov txheej txheem ntawm dissolving tooj liab yog sib tov cov khoom siv tooj liab thiab sulfuric acid nyob rau hauv lub tooj liab dissolving tank, thiab react los tsim tooj liab sulfate tov. Cov tshuaj tiv thaiv kab mob yog raws li nram no:
Cu+O2 → CuO
CuO + H2SO4 → CuSO4+H2O
Thaum lub sij hawm tus txheej txheem tooj liab dissolving, yuav tsum tau them nyiaj mloog mus rau kev tswj cov plua plav nyob rau hauv ib puag ncig thiab txawv teb chaws teeb meem nyob rau hauv cov ntaub ntawv raw cov ntaub ntawv los tiv thaiv cov tom ntej staining rau ntawm daim ntawv tooj liab, uas ua rau ib tug uneven chaw. Qhov xwm txheej no tuaj yeem ntes tau ntawm lub taub hau tuag thaum lub sijhawm txheej txheej, ua rau cov hlua tawg. Yog li ntawd, ib kauj ruam pom yuav tsum tau ntxiv rau hauv cov kauj ruam no kom tag nrho lim tawm cov impurities hauv cov tshuaj.
Cov tshuaj CuSO4 tau txais nyob rau hauv cov txheej txheem tooj liab dissolving yog siv raws li cov electrolyte, ib tug loj-inch titanium roller yog siv los ua cathode, thiab cov arc-zoo li tus txhuas alloy phaj yog siv los ua cov anode. Los ntawm kev tswj cov txheej txheem electrochemical tsis tau, cov tooj liab ions hauv cov tshuaj yuav precipitate ntawm cathode los tsim ib txheej tooj liab txuas ntxiv. Los ntawm kev sib hloov tas mus li ntawm cov menyuam cathode, cov ntawv tso nyiaj tooj liab yuav txuas ntxiv mus rau hauv cov yob kom tau txais cov ntawv ci.
