NEGATIVE ELECTRODE ACTIVE MATERIAL AND LITHIUM ION SECONDARY BATTERY USING THE SAME
First Claim
1. A negative electrode active material comprising graphite particles and crystalline silicon particles, whereina median diameter of the crystalline silicon particles is 0.7 μ
- m or less, anda weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less.
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Abstract
A negative electrode active material constituting a lithium ion secondary battery having high energy density and excellent cycle characteristics, and a negative electrode and a lithium ion secondary battery comprising the same are provided. The present invention relates to a negative electrode active material comprising graphite particles and crystalline silicon particles, wherein a median diameter of the crystalline silicon particles is 0.7 μm or less, and a weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less.
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Citations
8 Claims
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1. A negative electrode active material comprising graphite particles and crystalline silicon particles, wherein
a median diameter of the crystalline silicon particles is 0.7 μ - m or less, and
a weight ratio of the crystalline silicon particles to the total weight of the graphite particles and the crystalline silicon particles is 1 wt % or more and 25 wt % or less. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- m or less, and
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8-9. -9. (canceled)
Specification