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SILICON-BASED COMPOSITE NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREOF, AND NEGATIVE ELECTRODE OF LITHIUM ION BATTERY
SILICON-BASED COMPOSITE NEGATIVE ELECTRODE MATERIAL AND PREPARATION METHOD THEREOF, AND NEGATIVE ELECTRODE OF LITHIUM ION BATTERY
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机译:硅基复合负极材料及其制备方法,锂离子电池的负电极
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摘要
The present invention provides a silicon-based composite negative electrode material, including an inner core, a first shell layer, and a second shell layer, wherein the first shell layer covers the inner core; the second shell layer covers the first shell cover; the inner core includes a carbon-silicon composite material; the first shell layer includes an amorphous carbon layer; and the second shell layer comprises includes a conductive polymer layer. Meanwhile, further disclosed in the present invention are a preparation method for the silicon-based composite negative electrode material and a lithium ion battery including the silicon-based composite negative electrode material. The silicon-based composite negative electrode material provided in the present invention can effectively restrain the volume expansion of the inner core, construct a stable solid-liquid interface, form a stable SEI film, and improve the cycle stability and multiplier performance of the lithium ion battery.
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