Invention Grant
- Patent Title: Ultrathin surface coating on negative electrodes to prevent transition metal deposition and methods for making and use thereof
- Patent Title (中): 负极上的超薄表面涂层以防止过渡金属沉积及其制造和使用方法
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Application No.: US13745039Application Date: 2013-01-18
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Publication No.: US09034519B2Publication Date: 2015-05-19
- Inventor: Xingcheng Xiao , Junghyun Kim , Zhongyi Liu
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Agency: Harness, Dickey & Pierce, P.L.C.
- Main IPC: H01M4/134
- IPC: H01M4/134 ; H01M4/1391 ; H01M4/13 ; H01M4/04 ; H01M4/133 ; H01M4/36 ; H01M4/62 ; C23C16/30 ; C23C16/40 ; H01M4/505 ; H01M4/525

Abstract:
An electrode material for use in an electrochemical cell, like a lithium-ion battery, is provided. The electrode material may be a negative electrode comprising graphite, silicon, silicon-alloys, or tin-alloys, for example. By avoiding deposition of transition metals, the battery substantially avoids charge capacity fade during operation. The surface coating is particularly useful with negative electrodes to minimize or prevent deposition of transition metals thereon in the electrochemical cell. The coating has a thickness of less than or equal to about 40 nm. Methods for making such materials and using such coatings to minimize transition metal deposition in electrochemical cells are likewise provided.
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