Silicon-based anode material, method for manufacturing the same, and lithium secondary battery comprising the same

Method for Manufacturing Silicon-Based Anode Materials with Stabilized Interfaces via Polyaniline Layered Coating

This technology involves manufacturing silicon-based anode materials by applying a layered coating of the conductive polymer polyaniline to the surface of silicon-based active materials, thereby forming a stable solid electrolyte interface.

Conventional silicon-based anode materials suffer from electrode degradation and reduced conductivity due to significant volume expansion during charging and discharging, making it difficult to ensure a long cycle life.

By buffering volume changes and stabilizing the interface through a layered polyaniline coating, this technology can be applied to lithium secondary battery anodes to improve both conductivity and cycle life.

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Key Features:

• Preparing the silicon-based active material and synthesizing the conductive polymer polyaniline separately
• Forming a coating layer by applying the conductive polymer polyaniline in a layered structure onto the surface of the silicon-based active material
• Forming a stable solid electrolyte interface through the formation process of the silicon-based active material electrode coated with the conductive polymer
• Synthesizing polyaniline in the presence of para-toluenesulfonic acid and coating it onto the surface of the silicon active material

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