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Non-aqueous secondary battery
申请公布号：US8748036(B2)
申请号：US201113394558
申请日期：2011.12.27
申请公布日期：2014.06.10
发明人：Konishi Takashi
分类号：H01M4/133;H01M4/587;H01M4/38;H01M4/62;H01M4/134;H01M4/02
主分类号：H01M4/133
地址：Tokyo JP
摘要：A negative electrode active material of a non-aqueous secondary battery of the present invention includes a first active material, a second active material, and a third active material. The first active material is a carbon material having a D/G ratio of 0.15 or less, where G represents the peak intensity observed in a Raman spectrum from 1578 to 1592 cm−1 and D represents the peak intensity observed in a Raman spectrum from 1349 to 1353 cm−1 of Raman spectroscopy. The D50 of the second active material is 10 μm or less. The second active material includes at least one of a first carbon material having the D/G ratio of 0.2 to 2.0 and a second carbon material having the D/G ratio of 1.0 to 2.0. The D50 of the third active material is 5 μm or less. The third active material contains silicon and oxygen as constituent elements.
主权项：1. A non-aqueous secondary battery comprising: a positive electrode; a negative electrode; a non-aqueous electrolyte; and a separator, wherein the positive electrode comprises a positive electrode mixture layer that includes a positive electrode active material, the positive electrode mixture layer has a thickness of 70 to 300 μm per one side, the negative electrode comprises a negative electrode mixture layer that includes a negative electrode active material and a binder, the negative electrode mixture layer has a density of 1.4 g/cm3 or less, the negative electrode active material includes a first active material, a second active material, and a third active material, D50 of the first active material is 15 μm to 20 μm, the first active material is a carbon material having a D/G ratio of 0.15 or less, where G represents a peak intensity observed in a Raman spectrum from 1578 to 1592 cm−1 and D represents a peak intensity observed in a Raman spectrum from 1349 to 1353 cm−1 of Raman spectroscopy, D50 of the second active material is 10 μm or less, the second active material includes at least one of a first carbon material having the D/G ratio of 0.2 to 2.0 and a second carbon material having the D/G ratio of 1.0 to 2.0, D50 of the third active material is 5 μm or less, the third active material contains silicon and oxygen as constituent elements, a content of the first active material is 10 wt % to 57 wt % of a total weight of the negative electrode active material, a content of the third active material is 1 wt % to 10 wt % of the total weight of the negative electrode active material, and when the second active material includes the second carbon material, a content of the second carbon material is 40 wt % or less of the total weight of the negative electrode active material.