Lithium-ion roj teeb electrolyte muaj tej yam kev mob
Cov kua roj electrolyte siv nyob rau hauv lithium ion roj teeb yog tus neeg ua haujlwm ionic uas cov kua roj electrolyte lithium tau yaj hauv cov organic hnyav. Feem ntau, cov organic electrolyte ua cov lithium ion roj teeb yuav tsum muaj cov nram no:
(1) Feem xyuam rau txoj kev zoo ntawm cov ionic, feem ntau yuav tsum ncav cuag 10-3 ~ 2 * 10-3S / cm; tus lithium ion migration naj npawb yuav tsum ze rau 1;
(2) Electrochemically ruaj khov muaj ntau qhov dav; yuav tsum muaj qhov cub hluav taws xob ntawm qhov cub ntawm 0 ~ 5V;
(3) Zoo thermal stability thiab dav kub ntau;
(4) Cov khoom siv tshuaj khov khov ruaj khov, thiab tsis muaj tshuaj lom neeg cov tshuaj tiv thaiv nrog tus neeg tuav tam sim no thiab cov khoom tsis huv hauv cov roj teeb;
(5) Muaj kev nyab xeeb thiab tsawg toxicity, nyiam dua biodegradable.
Cov kuab tshuaj kom haum yuav tsum muaj qhov siab tshaj qhov qub thiab tsis muaj cov viscosity. Feem ntau siv cov alkyl carbonates xws li PC, EC muaj zog polarities, siab dielectric qhov siab, tab sis siab viscosity, loj zog intermolecular, thiab lithium ions tsiv hauv lawv. Qeeb. Tawm esters xws li DMC (dimethyl carbonate) thiab DEC (diethyl carbonate) muaj tsawg viscosity tab sis tsawg dielectric qhov. Yog li, thiaj li yuav nrhiav kev daws teeb meem siab siab ionic conductivity, nws feem ntau yog siv. PC + DEC, EC + DMC thiab lwm yam xyaw xim. Cov kua tshuaj organic no muaj qee cov flavors, tab sis feem ntau, lawv tag nrho RoHS raws txoj cai, REACH cov kev cai, thiab cov ntaub ntawv uas tsis tshua muaj tshuaj lom thiab cov phooj ywg zoo.
Cov kab mob ua muaj zog inorganic cov kua ntsev tam sim no muaj xws li LiBF4, LiPF6 thiab LiAsF6. Lawv kev txiav txim siab ntawm hluav taws xob conductivity, thermal stability thiab oxidation tsis kam yog raws li nram no:
Tus cwj pwm: LiAsF6 ≥LiPF6> LiClO4> LiBF4
Thermal stability: LiAsF6> LiBF4> LiPF6
Oxidation kuj: LiAsF6 muajLiPF6≥LiBF4> LiClO4
LiAsF6 muaj cov khoom siv hluav taws xob heev, kev ruaj ntseg thiab roj teeb thiab cov nqi tawm mus, tab sis nws cov ntawv thov tsuas yog muaj tshuaj lom lub luag hauj lwm ntawm arsenic. Tam sim no feem ntau siv tau yog LiPF6.