Harness, Dickey & Pierce, P.L.C.
Methods for making patterned, thick, silicon-containing electrodes
A high performance electrode for an electrochemical cell including electroactive materials having a large charge capacity and that undergo substantial volumetric expansion and contraction during cycling of the electrochemical cell and a method for making the high performance electrode are provided. The electroactive material of the high performance electrode may have a thickness greater than or equal to about 1 μm. Methods of forming the high performance electrodes includes patterning the electroactive material to form a plurality of void spaces using a high-speed process selected from the group consisting of: laser ablation, electron beam machining, ion beam milling, roll forming, embossing, lithography, and combinations thereof. The plurality of void spaces accommodates the volumetric expansion and contraction to minimize cracking and damage to the electrode during cycling of the electrochemical cell.
GM GLOBAL TECHNOLOGY OPERATIONS LLC
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Qinglin Mark W. Hongliang Xingcheng
Zhang Verbrugge Wang Xiao