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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

FIG. 7 illustrates different impacts of varying the LMP co-solvent %, in combination with linear carbonate co-solvents, in example electrolyte compositions on cell performance, where the cell comprises high voltage LCO and a (nano)composite Si-comprising volume-changing anode with low specific surface area of the active (nano)composite particles (approximately 5 m2/g) in accordance with an embodiment of the disclosure.

DETAILED DESCRIPTION

Aspects of the present invention are disclosed in the following description and related drawings directed to specific embodiments of the invention. The term “embodiments of the invention” does not require that all embodiments of the invention include the discussed feature, advantage, process, or mode of operation, and alternate embodiments may be devised without departing from the scope of the invention. Additionally, well-known elements of the invention may not be described in detail or may be omitted so as not to obscure other, more relevant details.

權(quán)利要求

1
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