Kev nce qib sai ntawm cov tsheb fais fab thiab cov khoom siv hluav taws xob muaj zog ntau tau ua rau muaj kev xav tau ntau ntxiv rau cov roj teeb lithium-ion uas them tau sai heev. Txawm li cas los xij, cov roj teeb lithium-ion uas them tau tam sim no raug kev puas tsuaj loj heev thaum lub sijhawm them sai thiab tej zaum yuav ua rau muaj kev puas tsuaj loj heev, uas ua rau muaj kev pheej hmoo ntawm kev nyab xeeb. Qhov no feem ntau yog los ntawm kev tsis ruaj khov ntawm electrochemical ntawm qhov anode-electrolyte interface, ua rau muaj kev puas tsuaj ntawm cov hlau-lithium deposition rau ntawm qhov chaw ntawm lub roj teeb thiab kev ruaj khov thermal tsis zoo.
Nyob rau xyoo tas los no, cov ntaub ntawv anode siab-voltage tau dhau los ua lwm txoj hauv kev zoo rau kev tiv thaiv kev tso lithium ntau dhau thiab kev tsim cov txheej txheem tsis ruaj khov-electrolyte interphase (SEI). Txawm hais tias muaj cov zog no, cov ntaub ntawv zoo tshaj plaws tseem raug txwv los ntawm kev ua haujlwm tsis zoo thiab kev ruaj khov thermal, uas ua rau lub zog tso zis thiab kev ntseeg siab mus sij hawm ntev tsis muaj zog.
Raws li cov xov xwm txawv teb chaws, txhawm rau daws cov teeb meem no, pab pawg tshawb fawb uas coj los ntawm Associate Professor Dongwook Han ntawm Seoul National University of Science thiab Technology tau tsim cov khoom siv lithium titanium phosphate anode off-stoichiometric (OS) nrog cov qauv NASICON-hom. Cov khoom siv no paub zoo txog kev ruaj khov ntawm cov qauv thiab thermal. Tus qauv tsim tuaj yeem ua rau muaj kev hloov pauv theem tsis tau npaj tseg hauv qab ntawm cov khoom siv nquag kom tawg los ntawm kev txwv kinetic thiab ua tiav kev ua haujlwm ceev ceev.
Cov kev tshawb pom tseem ceeb tau muab luam tawm hauv phau ntawv xov xwm Advanced Functional Materials.
Kev Hloov Kho Nto Rau Kev Thauj Mus Los Ion Sai
Lithium titanium phosphate (LTP) muaj cov qauv sodium-super-ionic-conductor (NASICON)-hom, uas muaj kev ruaj khov zoo heev ntawm cov qauv thiab thermal nrog rau cov channel lithium-ion diffusion sai. Txhawm rau kom siv tau nws lub peev xwm tag nrho, cov kws tshawb fawb tau siv txoj kev tsim qauv off-stoichiometric thiab txhob txwm nce qhov piv ntawm phosphorus (P) rau titanium (Ti). Cov khoom tsis muaj titanium no tsim cov cheeb tsam titanium phosphate (TPO) ze rau ntawm qhov chaw ntawm LTP cov khoom me me.
Cov cheeb tsam nplua nuj TPO no ua haujlwm ua cov channel kinetic ua haujlwm tau zoo, txo qhov kev thaiv zog rau kev thauj mus los lithium-ion hla lub anode-electrolyte interface thiab tsim cov kev hloov pauv ion-hloov ceev ze ntawm cov khoom me me. Tsis tas li ntawd, cov ntawv cog lus P-O-P uas yooj ywm heev hauv TPO muab kev ywj pheej ntawm cov qauv los hloov kho rau qhov sib txawv ntawm qhov ntim thaum lub sijhawm them ceev thiab tiv thaiv cov qauv NASICON-hom tiv thaiv kev puas tsuaj uas tsis rov qab tau.
Kev Ua Haujlwm Ruaj Khov Hauv Cov Xwm Txheej Ceev Ceev
Yog li ntawd, hauv kev ntsuam xyuas qhov muaj peev xwm them nqi, qhov qhia tseem ceeb uas ntsuas qhov muaj peev xwm them ceev, OS-LTP-carbon (OS-LTP/C) composite anode khaws cia tau 86% ntawm nws lub peev xwm pib hauv qab 10C them nqi, thaum lub peev xwm ntawm pristine LTP/C composite anode poob qis heev.
Cov khoom siv no kuj muab kev ruaj khov zoo heev tom qab ntau tshaj 250 lub voj voog. Cov qauv puv ntoob qhia txog kev ua tau zoo ntawm tus nqi zoo sib xws thiab kev sib raug zoo dav dav nrog cov cathodes siab voltage.
Ib Txoj Kev Dav Dua Mus Rau Cov Roj Teeb Muaj Kev Nyab Xeeb Dua
"Peb txoj kev tsim cov qauv tshiab rau kev tsim cov roj teeb uas them sai, thiab nws tuaj yeem siv dav rau ntau lub tshuab khaws cia hluav taws xob yav tom ntej suav nrog cov roj teeb khov kho," Han tau taw qhia. "Lub tswv yim tsim no tuaj yeem ua rau cov tsheb fais fab siv tau zoo dua los ntawm kev luv lub sijhawm them, txhim kho kev nyab xeeb thiab muab kev txhawb nqa rau cov hluav taws xob rov ua dua tshiab."
Xaus lus, qhov kev tsim qauv tsis raws li qhov xav tau no daws tau ib qho ntawm cov teeb meem tseem ceeb uas cov roj teeb rov qab tau ntsib thiab muab txoj hauv kev zoo rau kev siv tshuab khaws cia hluav taws xob uas npaj txhij rau kev lag luam.
Lub sijhawm tshaj tawm: Lub Yim Hli-07-2026