发明名称 |
NEGATIVE ELECTRODE ACTIVE MATERIAL, NEGATIVE ELECTRODE, AND POWER STORAGE DEVICE |
摘要 |
An object is to improve characteristics of a power storage device and achieve a long lifetime. In the case where a lithium nitride is used for a negative electrode active material of a power storage device, a plurality of lithium nitride layers with different lithium concentrations are stacked. For example, in the case where a first lithium nitride layer and a second lithium nitride layer are stacked over a current collector, lithium is contained in the first lithium nitride layer at a lower concentration than lithium contained in the second lithium nitride layer. In this case, a concentration of a transition metal of the first lithium nitride layer is higher than a concentration of the transition metal of the second lithium nitride layer. Note that another alkali metal may be used instead of lithium. |
申请公布号 |
WO2011040348(A1) |
申请公布日期 |
2011.04.07 |
申请号 |
WO2010JP66633 |
申请日期 |
2010.09.17 |
申请人 |
SEMICONDUCTOR ENERGY LABORATORY CO., LTD.;MORIWAKA, TAMAE;TAKAHASHI, TATSUYA |
发明人 |
MORIWAKA, TAMAE;TAKAHASHI, TATSUYA |
分类号 |
H01M4/136;C01G53/00;H01M4/58;H01M10/052;H01M10/0566 |
主分类号 |
H01M4/136 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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