Source: Engineering.Columbia.edu
Txuas ntxiv hluav taws xob zoo li cua thiab hnub ci tseem ceeb rau txhawb peb lub ntiaj teb, tab sis lawv tuaj nrog txoj kev sib tw loj: Lawv tsis tau tsim lub zog thaum nws xav tau. Txhawm rau ua kom muaj feem ntau, peb xav tau txoj hauv kev ua tau zoo thiab pheej yig los khaws lub zog uas lawv tsim, yog li peb muaj hwj chim txawm tias thaum lub hnub tsis ci ntsa iab.
Columbia Engineering cov kws tshawb fawb tau tsom mus rau kev tsim cov roj teeb tshiab los hloov pauv li cas txuas dua tshiab. Hauv kev tshawb fawb tshiab tau luam tawm, pab pawg siv K-}}}}}}, ua ke}}}}}
"Nws yog ib qho tseem ceeb uas peb muaj peev xwm txuas ntxiv ntawm cov roj teeb uas tau ua haujlwm tau yooj yim thiab ua haujlwm tau ua haujlwm," tuaj yeem tsim cov ntaub ntawv ntawm cov kws tshaj lij kev ua haujlwm thiab lej ntawm Columbia Engineering. "Ua kom muaj zog txuas ntxiv dua tshiab yuav pab ua rau peb cov phiaj xwm ruaj khov, txo qis peb lub zog rau txhua tus."
Tshiab electrolyte pab k-na \/ s roj teeb khw thiab tso lub zog ntau dua
There are two major challenges with K-Na/S batteries: they have a low capacity because the formation of inactive solid K2S2 and K2S blocks the diffusion process and their operation requires very high temperatures (>250 OC) uas xav tau cov thermal kev tswj hwm, yog li nce tus nqi ntawm cov txheej txheem. Cov kev tshawb fawb dhau los muaj kev tawm tsam nrog cov khoom siv precipitates thiab tsis tshua muaj peev xwm thiab kev tshawb nrhiav tau rau cov txheej txheem tshiab los txhim kho cov roj teeb.
Yang pawg tsim tawm cov electrolyte tshiab, cov kuab tshuaj ntawm acetamy thiab ε-caprolactam, los pab lub roj teeb thiab tso lub zog. Qhov hluav taws xob no tuaj yeem tshem tawm K2S2 thiab K2S, txhim kho lub zog ntom thiab lub zog siv hluav taws xob nruab nrab ntawm qhov kub thiab txias. Tsis tas li ntawd, nws ua rau lub roj teeb ua lag luam los ua haujlwm ntawm qhov qis dua (nyob ib ncig ntawm 75 degree) ntau dua li kev ua tiav yuav luag muaj peev xwm khaws lub zog.
"Peb txoj hauv kev ua tiav tau ze li ntawm theoretical tshem tawm lub peev xwm kev tshem tawm thiab lub neej txuas ntxiv. Qhov no yog qhov kev kawm sib txuas lus zoo tshaj plaws
Txoj kev kom muaj zog ua kom muaj zogy yav tom ntej
Yang pawg yog koom nrog Columbia Electria Electrochemical Center (CEEC), uas siv sij hawm ntau mus kom nrhiav tau cov thev naus laus zis ntau thiab nrawm mus ua lag luam. CeC koom nrog ua ke thiab cov kws tshawb nrhiav los ntawm thoob plaws lub tsev kawm ntawv ntawm kev kawm cov neeg hauv hluav taws xob nrog cov tshuab hluav taws xob rau cov tshuab. Nws txoj kev sib koom tes kev lag luam pab tau kom paub qhov tseeb ntawm electrochemical zog cia thiab hloov dua siab tshiab.
Npaj kom teev
Thaum tam sim no tau tsom mus rau cov roj teeb me me, cov roj teeb loj me, lawv lub hom phiaj yog thaum ub ua kom ntsuas cov thev naus laus zis ntau npaum li cas. Yog tias lawv ua tiav, cov roj teeb tshiab no tuaj yeem muab cov hluav taws xob ruaj khov thiab txhim khu kev qha ceev xwm txheej los ntawm cov khoom siv tau yooj yim, txawm tias thaum lub sijhawm muaj hnub nyoog qis lossis cua. Pab pawg no yog tam sim no ua haujlwm ntawm kev ua kom ua tau zoo ntawm cov hluav taws xob electrolyte.
