Nrog rau txoj kev loj hlob sai ntawm lub zog tshiab hluav taws xob tsheb thiab lub dav hlau hluav taws xob, qhov kev thov rau kev tsav tsheb txuas ntxiv hauv ob qho tib si nce ntxiv ntawm lub zog -lithium ntom- ion roj teeb (LIBs)

Nrog rau txoj kev loj hlob sai ntawm lub zog tshiab hluav taws xob tsheb thiab lub dav hlau hluav taws xob, qhov kev thov rau kev tsav tsheb txuas ntxiv nyob rau hauv ob qho tib si nce ntxiv ntawm lub zog - ntom ntom lithium - ion roj teeb (LIBs).

Tam sim no, nyob rau hauv ib txwm ua kua roj teeb, txoj kev thauj mus los ntev ntawm Li + ions nyob rau hauv lub ntxeem tau electrode yog qhov tseem ceeb. Qhov ntev no nce ntxiv nrog rau qhov chaw thauj khoom, ncaj qha txwv ceev ceev - kev them nqi. Ntau lub tswv yim tau npaj rau hauv kev lag luam, ntawm cov electrode thinning yog ib txoj hauv kev tseem ceeb los txhim kho tus nqi kev ua tau zoo, tab sis txoj kev no los ntawm tus nqi roj teeb lub zog ceev.

Cov khoom siv- lub xeev cov roj teeb, raws li lub hom phiaj kawg ntawm cov roj teeb, ntsib cov teeb meem tshaj tawm los thiab nqi; ib qho ntawm cov fwj loj tshaj plaws yog daws qhov teeb meem ntawm lithium dendrite tsim. Lithium hlau yog cov khoom lag luam zoo tshaj plaws rau cov roj teeb, tab sis dendrite kev loj hlob, siab reactivity ntawm lithium, thiab ntim expansion ua rau muaj kev nyab xeeb rau cov roj teeb lithium hlau, cuam tshuam cov kev siv ntawm lithium hlau anodes hauv rechargeable roj teeb.

Ob qho ntawm cov ntsiab lus mob tseem ceeb tam sim no taw qhia rau tib txoj kev daws teeb meem: foamed tooj liab. Foamed tooj liab, tseem hu ua 3D tooj liab, yog cov khoom siv roj teeb tshiab nrog ntau yam khoom tshwj xeeb thiab qhov zoo. Foamed tooj liab yog cov khoom siv hlau uas muaj ntau qhov sib txuam sib txuas sib txuas ntawm qhov pores, nthuav tawm zoo conductivity thiab ductility. Hauv lithium-Ion roj teeb daim ntawv thov, piv rau thawj- tiam tooj liab ntawv tam sim no sau thiab thib ob- tiam tam sim no cov khoom sib xyaw, foamed hlau tam sim no sau sawv cev rau peb tiam. Qhov thib peb - tiam tam sim no tus neeg sau khoom tseem yog qhov tseem ceeb uas txiav txim siab seb Tuam Tshoj tuaj yeem yog thawj zaug hauv ntiaj teb kom ua tiav kev lag luam ntawm tag nrho -khoom- lub xeev roj teeb.

Ua ntej, foamed tooj liab, raws li cov khoom siv roj teeb, muaj cov khoom siv hluav taws xob siab, uas pab txhim kho cov nqi thiab kev ua haujlwm ntawm lub roj teeb. Nws cov qauv ntxeem tau nce qhov chaw sib cuag ntawm electrode thiab electrolyte, yog li txhim kho lub roj teeb lub zog ceev thiab lub voj voog ruaj khov. Cov khoom siv tam sim no (TCCs), xws li cov ntawv hlau hlau xws li Cu thiab Al, tsis muaj porosity thiab impermeable rau electrolyte. Yog li ntawd, cov TCCs no tsis pab Li + thauj thiab txwv Li + thauj ntawm electrodes mus rau ib sab, txwv ceev ceev - them nqi.

Nyob rau hauv sib piv, qhov ntxeem tau tsim ntawm foamed tooj liab tso cai rau Li + ions hla los ntawm ob qho tib si tam sim no collector thiab cov separator ib txhij, yog li halving lub zoo Li + thauj deb thiab nce qhov diffusion - txwv C- tus nqi ua tau zoo los ntawm plaub zaug yam tsis muaj kev cuam tshuam lub zog ceev. Tam sim no, cov thawj coj hauv tebchaws thiab thoob ntiaj teb siab - cov tuam txhab roj teeb ua haujlwm tau ua cov kev tshawb fawb sib piv. Raws li tsab xov xwm xwm txheej tshiab, cov roj teeb uas siv cov khoom siv tam sim no muaj lub zog tshwj xeeb (276 Wh kg⁻¹) thiab tseem ceeb ceev- lub peev xwm them nqi, ua haujlwm ntawm tus nqi ntawm 4 C (78.3% C / C), 6 C (70.5% C / C), thiab 10 C (54.3% C / C). Cov qauv tsim cov khoom siv ntxeem tau tam sim no tau sib xws nrog cov txheej txheem tsim cov roj teeb uas twb muaj lawm thiab lwm yam kev siv ceev ceev -them nqi, ua kom cov roj teeb muaj txiaj ntsig zoo thiab muab cov tswv yim zoo rau kev tsim cov roj teeb tom ntej - tiam.

Thib ob, hais txog qhov teeb meem loj tshaj plaws hauv cov khoom siv - lub xeev cov roj teeb -lithium dendrite tsim- thaj chaw siab ntawm tooj liab ua npuas dej ua tau zoo nthuav dav hauv cheeb tsam electrode, muab cov chaw ua haujlwm ntau dua rau cov tshuaj tiv thaiv electrochemical. Qhov no ua rau muaj qhov ceev dua tam sim no thiab roj teeb muaj peev xwm. Qhov tseem ceeb tshaj, thaj tsam loj dua txhais tau hais tias ib chav tsev me me tam sim no, uas yuav txhim kho lithium dendrite tsim. Nws twb tau dav siv nyob rau hauv condensed - xeev thiab khoom - lub xeev cov roj teeb nyob rau hauv lub chaw soj nstuam ntawm cov roj teeb manufacturers.

Tsis tas li ntawd, tooj liab ua npuas ncauj kuj muaj lub zog zoo thiab ruaj khov, muaj peev xwm tiv taus cov kev ntxhov siab uas tshwm sim thaum lub sij hawm siv roj teeb, ncua roj teeb lub neej. Qhov no kuj yog qhov txaus nyiam heev rau cov khoom siv hluav taws xob- xeev.

Txhua GWh roj teeb yuav tsum tau 700 tons ntawm tooj liab rau 6m ntawm cov ntawv ci tooj liab, thiab cov khoom sib xyaw tam sim no hnyav txog 300 tons, xav tau txog 250 tons ntawm tooj liab. Foamed tooj liab tsuas xav tau txog 100 tons. Qhov kev txo qis hauv kev siv tooj liab tseem ceeb, muab qhov kev cia siab tam sim no ntawm qhov ntev - lub sij hawm tooj liab nce, tuaj yeem tsis tsuas yog txuag tau ntau tus nqi tab sis kuj tseem txhim kho lub roj teeb lub zog ceev.