CAS NO: 311810-76-1 Di-Fluoro Ethylene Carbonate

Nws yog qhov txo qis dua qhov muaj peev xwm thiab muaj zog tsis zoo electrode interface adsorption cov cuab yeej tau lees paub los ntawm cov qauv molecular uas ua rau nws raug txo qis hauv electrochemical ua ntej lub ntsiab hnyav ntawm electrolyte; cov yam ntxwv tseem ceeb ntawm nws qhov kev txo qis decomposition muaj peev xwm yog tias nws siab tshaj qhov hnyav ntawm chav kawm carbonate, me ntsis qis dua li cov yeeb yaj kiab zoo ib yam - tsim cov khoom siv ntxiv (xws li VC), thiab cov peev txheej muaj peev xwm nqaim thiab ruaj khov, uas yog tus yuam sij kom ua tiav "kev tsim cov yeeb yaj kiab nyiam yam tsis muaj kev puas tsuaj ntxov ntxov".

DFEC ua tiav cov kev tswj hwm ntawm ntau yam khoom los ntawm cov yam ntxwv ntawm ib qho molecule. It uses a dense and flexible SEI membrane rich in LiF as the core link, while optimizing interface impedance, ion conductivity and the thermal/electrochemical stability of the electrolyte. Qhov no yog qhov sib npaug ntawm lub roj teeb lub voj voog lub neej, qis - kev ua haujlwm kub thiab siab voltage kam rau ua.

The core principle of DFEC for improving the low-temperature performance of lithium batteries is to reduce interfacial impedance by using a dense LiF-containing SEI film, and to optimize the low-temperature ionic conductivity and desolvation kinetics of the electrolyte through a bifluorine structure; Qhov ntsuas kub qis tshaj plaws yog siv tau rau -40 degree, thiab nyob rau hauv huab cua txias (ua ke nrog thermal tswj), nws tuaj yeem ncav cuag -50 degree.

Yog vim li cas DFEC tuaj yeem tsim ib zaj duab xis nyiam ntawm qhov tsis zoo electrode yog tias ob -fluorine- hloov cov qauv molecular endows nws nrog kev txo qis dua qhov muaj peev xwm + muaj zog tsis zoo electrode interface adsorption cuab yeej, ua rau nws mus rau kev taw qhia electrochemical txo ntawm cov khoom -electrode.

Cov dej noo ntawm lub zog cia roj teeb rau DFEC yog tsawg dua lossis sib npaug li 10 ppm thiab cov kua qaub qis dua lossis sib npaug li 5 ppm (ntau nruj dua li cov roj teeb hluav taws xob / cov khoom siv hluav taws xob). Qhov tseem ceeb yog nyob rau hauv kev ua haujlwm ntawm lub zog cia roj teeb, uas suav nrog lub neej ntev (4000+ zaug), siab- tus nqi them thiab tso tawm, thiab sab nraum zoov dav - kub ua haujlwm. Cov ntsiab lus tseem ceeb yog tias cov electrolyte yuav tsum tsis muaj kev cuam tshuam sab nraud thiab ib qho ultra-ruaj khov interface. Txawm tias me me ntawm cov dej noo los yog kua qaub tuaj yeem ua rau muaj kev cuam tshuam ntawm kev ua haujlwm degradation, ncaj qha txiav txim siab tag nrho lub neej kev ntseeg siab ntawm lub zog cia ntawm tes.