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Electrolytes for improved performance of cells with high-capacity anodes based on micron-scale moderate volume-changing particles

專利號
US11177500B2
公開日期
2021-11-16
申請人
Sila Nanotechnologies Inc.(US CA Alameda)
發(fā)明人
Gleb Yushin; Ashleigh Ward; Gregory Roberts
IPC分類
H01M10/052; H01M10/0561; H01M4/38; H01M10/0569; H01M10/42; H01M10/0568; H01M4/02; H01M10/0567
技術(shù)領(lǐng)域
in,li,lmp,vol,anodes,anode,elr,solvent,fec,e.g
地域: CA CA Alameda

摘要

A metal-ion battery cell is provided that comprises anode and cathode electrodes, a separator, and an electrolyte. The anode electrode may, for example, have a capacity loading in the range of about 2 mAh/cm2 to about 10 mAh/cm2 and comprise anode particles that (i) have an average particle size in the range of about 0.2 microns to about 40 microns, (ii) exhibit a volume expansion in the range of about 8 vol. % to about 180 vol. % during one or more charge-discharge cycles of the battery cell, and (iii) exhibit a specific capacity in the range of about 600 mAh/g to about 2,600 mAh/g. The electrolyte may comprise, for example, (i) one or more metal-ion salts and (ii) a solvent composition that comprises one or more low-melting point solvents that each have a melting point below about ?70° C. and a boiling point above about +70° C.

說明書

In a further embodiment of the disclosure, examples of suitable esters for use as LMP solvent(s) or as component(s) in LMP co-solvent(s) in the electrolyte include, but are not limited to, various formates (e.g., methyl formate, ethyl formate, propyl formate, butyl formate, amyl formate, hexyl formate, heptyl formate, etc.), various acetates (e.g., methyl acetate, ethyl acetate, propyl acetate, butyl acetate, amyl acetate, hexyl acetate, heptyl acetate, etc.), various propionates (e.g., methyl propionate, ethyl propionate, propyl propionate, butyl propionate, amyl propionate, hexyl propionate, heptyl propionate, etc.), various butyrates (e.g., methyl butyrate, ethyl butyrate, propyl butyrate, butyl butyrate, amyl butyrate, hexyl butyrate, heptyl butyrate, etc.), various valerates (e.g., methyl valerate, ethyl valerate, propyl valerate, butyl valerate, amyl valerate, hexyl valerate, heptyl valerate, etc.), various caproates (e.g., methyl caproate, ethyl caproate, propyl caproate, butyl caproate, amyl caproate, hexyl caproate, heptyl caproate, etc.), various heptanoates (e.g., methyl heptanoate, ethyl heptanoate, propyl heptanoate, butyl heptanoate, amyl heptanoate, hexyl heptanoate, heptyl heptanoate, etc.), various caprylates (e.g., methyl caprylate, ethyl caprylate, propyl caprylate, butyl caprylate, amyl caprylate, hexyl caprylate, heptyl caprylate, etc.), various nonaoates (e.g., methyl nonaoate, ethyl nonaoate, propyl nonaoate, butyl nonaoate, amyl nonaoate, hexyl nonaoate, heptyl nonaoate, etc.), various decanoates (e.g., e.g., methyl decanoate, ethyl decanoate, propyl decanoate, butyl decanoate, amyl decanoate, hexyl decanoate, heptyl decanoate, etc.), and fluorinated versions of the above-discussed esters, to name a few examples.

權(quán)利要求

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