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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(shù)領(lǐng)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

In one aspect, the conductive polymer is selected from the group consisting of: polypyrrole, polyaniline, polythiophene, PEDOT, and PEDOT:PSS, copolymers thereof, derivatives thereof, and combinations thereof.

In one aspect, the conductive polymer includes the PEDOT:PSS.

In one aspect, a weight ratio of the PEDOT to the PSS is greater than or equal to about 0.1 to less than or equal to about 10.

In one aspect, a conductivity of the PEDOT:PSS is greater than or equal to about 1 S/cm to less than or equal to about 500 S/cm.

In one aspect, the preparing includes providing the conductive polymer in an amount greater than or equal to about 0.1 weight percent to 30 weight percent of the solution.

In one aspect, the electroactive material is a positive electroactive material selected form the group consisting of: NMC, LLC, LFP, LMFP, NCMA, LMO, and combinations thereof.

In one aspect, the positive electroactive material includes the LLC.

In one aspect, the electroactive material is a negative electroactive material selected from the group consisting of: silicon, silicon monoxide, graphite, and combinations thereof.

In one aspect, a weight ratio of the conductive polymer to the electroactive material is greater than or equal to about 0.01 to less than or equal to about 0.3.

In one aspect, the plurality of particles defines an average particle size of greater than or equal to about 0.05 μm to less than or equal to about 30 μm.

權(quán)利要求

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