发明名称 |
Large-grain graphene thin film current collector and secondary batteries containing same |
摘要 |
A unitary graphene-based current collector in a battery or capacitor. The current collector is or contains a unitary graphene layer that is composed of closely packed and chemically bonded parallel graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content less than 5% by weight (more typically 0.001% to 1%), an average grain size larger than 5 μm (more typically >100 μm; some as large as >cm), a physical density higher than 1.8 g/cm3, and is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C. (typically and preferably from 1,000 to 3,000° C.). Such an integrated or unitary graphene entity is compatible with essentially all electrolytes commonly used in batteries and supercapacitors. |
申请公布号 |
US2015086881(A1) |
申请公布日期 |
2015.03.26 |
申请号 |
US201313987994 |
申请日期 |
2013.09.23 |
申请人 |
Zhamu Aruna;Jang Bor Z.;Chen Guorong |
发明人 |
Zhamu Aruna;Jang Bor Z.;Chen Guorong |
分类号 |
H01G11/68;H01M4/66 |
主分类号 |
H01G11/68 |
代理机构 |
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代理人 |
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主权项 |
1. A graphene-based current collector in a battery or capacitor, said current collector being a unitary graphene layer containing closely packed and chemically bonded parallel graphene planes having an inter-graphene plane spacing of 0.335 to 0.40 nm and an oxygen content less than 5% by weight, an average grain size larger than 5 μm, a physical density higher than 1.8 g/cm3, and is obtained from heat-treating a graphene oxide gel at a temperature higher than 100° C. |
地址 |
Centerville OH US |