NEGATIVE ELECTRODE ACTIVE MATERIAL, METHOD FOR PREPARING THE SAME AND LITHIUM SECONDARY BATTERY INCLUDING THE SAME
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United States of America Patent
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Issued Date -
Mar 23, 2023
app pub date -
Mar 12, 2021
filing date -
Mar 13, 2020
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Abstract
A negative electrode active material for a lithium secondary battery, a lithium secondary battery including the same, and a method for preparing the negative electrode active material is disclosed. The negative electrode active material includes a porous carbon coating layer self-bound to a surface of a carbonaceous material. The porous carbon coating later contains porous carbon particles, and thus shows reduced resistance during lithium-ion intercalation on the surface of the carbonaceous material and provides improved surface reactivity and structural stability. This provides improved high-rate charge characteristics, while causing no deterioration of charge/discharge efficiency and life characteristics, when being used as a negative electrode active material for a lithium secondary battery. The self-bound amorphous carbon coating layer may optionally have a controlled pore structure through chemical etching.
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