Composite silicon-based negative electrode material, preparation method thereof and lithium ion battery
The invention discloses a composite silicon-based negative electrode material, a preparation method thereof and a lithium ion battery. The composite silicon-based negative electrode material is of a core-shell structure, and the core-shell structure comprises a core body, a first shell layer coating...
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Main Authors | , , , , |
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Format | Patent |
Language | Chinese English |
Published |
05.03.2021
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Subjects | |
Online Access | Get full text |
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Summary: | The invention discloses a composite silicon-based negative electrode material, a preparation method thereof and a lithium ion battery. The composite silicon-based negative electrode material is of a core-shell structure, and the core-shell structure comprises a core body, a first shell layer coating the core body and a second shell layer coating the first shell layer; wherein the material of the core body comprises a silicon negative electrode material, the material of the first shell layer comprises a pre-lithiated material, and the material of the second shell layer comprises carbon. The composite silicon-based negative electrode material has the advantages of low initial coulombic efficiency, low internal resistance, high double-shell mechanical properties, effective inhibition of the volume expansion of the silicon-based negative electrode material, maintenance of the structural stability in the charging and discharging process, and excellent cycle performance. And moreover, the process conditions are eas |
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Bibliography: | Application Number: CN202011361502 |