Negative active material and preparation method thereof and secondary battery
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United States of America Patent
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Nov 3, 2020
Grant Date -
Sep 21, 2017
app pub date -
Feb 28, 2017
filing date -
Mar 15, 2016
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Abstract
The present application discloses a negative active material and a preparation method thereof and a secondary battery. The negative active material comprises: lithium pre-intercalated silicon-containing materials; and a polymer coating layer coated on an outer surface of each particle of the lithium pre-intercalated silicon-containing materials. The negative active material can improve the first coulombic efficiency of the secondary battery, inhibit the volume expansion of the secondary battery and improve the cycle performance of the secondary battery. The preparation method of the negative electrode plate is simple, environment-friendly, and suitable for mass production.
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