多孔纳米硅碳复合负极材料及其制备方法、负极极片及固态电池
By combining biomass-based porous hard carbon with silane coupling agents, graphene oxide, graphite, and carbon nanotubes, porous nano-silicon-carbon composite anode materials are prepared, solving the problems of volume expansion, interface compatibility, and transport performance of silicon-based materials in all-solid-state batteries, and realizing the application of solid-state batteries with high energy density, long cycle life, and low cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHENZHOU NEW ENERGY BATTERY MATERIALS RESEARCH CENTER
- Filing Date
- 2026-04-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing all-solid-state battery anode materials suffer from significant volume expansion of high-capacity silicon-based materials, poor electron and ion transport performance, poor compatibility with solid electrolyte interfaces, high impedance, and complex and costly preparation processes for some high-performance materials, making them difficult to industrialize.
A porous nano-silicon-carbon composite anode material was prepared by constructing a matrix using biomass-based porous hard carbon, combining the interface regulation of silane coupling agent and graphene oxide, and forming a conductive network with graphite and carbon nanotubes. The biomass carbon raw material and alkaline etching form a rich pore structure, which enhances the interfacial bonding force and optimizes lithium-ion transport.
It achieves high specific capacity (2100-2500 mAh/g), low volume expansion (≤70%), excellent interface compatibility, reduces interface charge transfer impedance to below 40Ω·cm2, improves cycle stability and rate performance, and is low in cost and suitable for mass production.
Smart Images
Figure CN121983566B_ABST