NEGATIVE ELECTRODE AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME
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United States of America Patent
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Feb 1, 2024
app pub date -
Sep 17, 2021
filing date -
Sep 21, 2020
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Abstract
A negative electrode and lithium secondary battery including the same. The negative electrode includes: a current collector; and a negative electrode active material layer on at least one surface of the current collector. The negative electrode active material layer includes 1) a negative electrode active material including a Mg-containing silicon oxide particles, and a graphene coating layer surrounding the surface of the Mg-containing silicon oxide particles, 2) a conductive material including single-walled carbon nanotubes (SWCNT), and 3) a binder. The graphene contained in the graphene coating layer has a D/G band intensity ratio of 0.8 to 1.5, and the D/G band intensity ratio of the graphene is defined as an average value of the ratio of the maximum peak intensity of D band at 1360±50 cm−1 based on the maximum peak intensity of G band at 1580±50 cm−1, as determined by Raman spectroscopy of the graphene.
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