Research Progress on Silicon-Based Negative Electrode Materials and Silicon Oxide Negative Electrode Materials
In order to solve the energy crisis,energy storage technology needs to be continuously developed.The battery application market is constantly expanding,and the requirements for energy and power density are becoming increasingly high.Choosing high specific capacity negative electrode materials is an important strategy to achieve this goal.Silicon has a capacity of 3579 mAh/g and is expected to replace graphite electrodes,but is limited by large volume expansion and unstable solid electrolyte interfaces.Silicon oxide negative electrode has a high theoretical specific capacity of 2600 mAh/g and good cycling stability,making it a promising negative electrode material for lithium-ion batteries.However,the volume effect and inherent conductivity of silicon based negative electrode materials and silicon oxide negative electrode materials during cycling are poor,which limits their practical applications.At present,the modification methods for silicon based negative electrodes mainly include nanocrystallization,silicon carbon composite materials,optimization of electrolytes,and addition of additives.This article will summarize and prospect the research results of silicon based negative electrode materials and silicon oxide negative electrode materials.
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