Negative electrode active material for secondary cell, and secondary cell
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYohei Uchiyama, Norihisa Yamamoto, Tatsuya Akira
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Abstract
This negative electrode active material for a secondary cell which is one aspect of the present disclosure comprises: a silicate phase that contains Li, Si, and Mx (Mx alkali metal, alkaline earth metal, and an element other than Si); silicon particles dispersed in the silicate phase; and oxide particles that contain Zr dispersed in the silicate phase. The content of each element with respect to the total of the elements other than oxygen in the silicate phase is 3 to 45 mol % for Li, 40 to 78 mol % for Si, and 1 to 40 mol % for Mx.
Claims8
A negative electrode active material for a secondary battery comprising:
- a silicate phase including Li, Si, and Mx, wherein Mx is an element other than an alkali metal, an alkaline earth metal, or Si;
- silicon particles dispersed in the silicate phase;
- and
- oxide particles including at least any one of oxide particles including Zr, oxide particles including Ce, oxide particles including Ca, oxide particles including Al, oxide particles including Fe, oxide particles including Mg, oxide particles including Ti, and oxide particles including W, dispersed in the silicate phase, wherein,
- in the silicate phase, a Li content is 3 to 45 mol %, a Si content is 40 to 78 mol %, and an Mx content is 1 to 40 mol %, each based on the total amount of elements other than oxygen.
Dependencies are inferred from the claim text.