Negative electrode and lithium ion secondary battery
AssigneeTDK Corporation
InventorsYasuhiro IKEDA, Atsushi SANO
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Abstract
A negative electrode includes a negative electrode active material layer containing a negative electrode active material mainly containing silicon and silicon oxide. In the negative electrode, the ratio of the film thickness of the negative electrode active material layer to the particle size distribution D99 is in the range of 1.2 to 2.0, the value of the D99 is in the range of 7 to 27 μm, and the negative electrode active material layer has a density ranging from 1.2 to 1.6 g/cm3.
Claims4
A negative electrode comprising a negative electrode active material layer containing a negative electrode active material mainly containing silicon and silicon oxide, wherein:
- a ratio of a film thickness of the negative electrode active material layer to a particle size distribution D99 is in the range of 1.2 to 2.0;
- a value of the D99 is in the range of 7 to 27 μm, and the negative electrode active material layer has a density ranging from 1.2 to 1.6 g/cm3.
Dependencies are inferred from the claim text.