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Method of coating electroactive materials with conductive polymers

專利號
US11996553B2
公開日期
2024-05-28
申請人
GM GLOBAL TECHNOLOGY OPERATIONS LLC（US MI Detroit）
發(fā)明人
Gongshin Qi; Jiazhi Hu
IPC分類
H01M4/36; H01M4/04; H01M4/38; H01M4/525; H01M4/583; H01M4/62; H01M10/0525; H01M4/02
技術領域
equal,lithium,or,about,optionally,electrode,than,percent,conductive,weight
地域： MI MI Detroit

摘要

The present disclosure provides a method of preparing a coated electroactive material. The method includes providing a plurality of particles including an electroactive material. The method further includes coating the plurality of particles with a conductive polymer. The coating includes preparing a solution of water and the conductive polymer. The coating further includes forming a slurry by combining the solution with the plurality of particles. The method further includes drying the slurry to form the coated electroactive material. The coated electroactive material includes the plurality of particles. Each of the plurality of particles is at least partially coated with the conductive polymer. In certain aspects, the present disclosure provides a method of preparing an electrode including the coated electroactive material.

說明書

The electroactive material may be a positive electroactive material (i.e., a cathode material) or a negative electroactive material (i.e., an anode material). The positive electroactive material may include a lithium nickel manganese cobalt oxide (LiNiCoMnO2) (“NMC”); a lithium- and manganese-rich layered cathode material (“LLC”) (e.g., xLi2MnO3-(1?x)LiMO2, M=Mn, Ni, Co, x=0.05-0.95, for example, x=0.1, x=0.2, x=0.3, x=0.4, x=0.5, x=0.6, x=0.7, x=0.8); lithium iron phosphate (LiFePO4) (“LFP”); lithium manganese iron phosphate (LiMnxFe1?x(PO4)) (“LMFP”), Li(NixMnyCozAlp)O2, where 0≤x≤1, 0≤y≤1, 0≤z≤1, 0≤p≤1, x+y+z+p=1 (“NCMA”), LMO, or any combination thereof. The negative electroactive material may include silicon, silicon monoxide, graphite, or any combination thereof.

Returning to FIG. 2, providing the electroactive material at 200 may include preparing the electroactive material. Preparing the electroactive material may include preparing a solution of a solvent and electroactive material precursors; concurrently heating and stirring the solution until a wet, foam-like solid is formed; drying the wet foam-like solid, grinding the dried foam-like solid to form a plurality of particles having a desired particle size; and calcining the plurality of particles to form the electroactive material.

權利要求

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