摘要
硅因理论能量密度高、工作电位较低、资源丰富等特点,被认为是新一代最有前途的锂电池负极材料。硅负极材料在充放电过程中体积变化巨大,导致循环容量快速衰减和内阻增加,限制了硅负极的实际应用。着重介绍了改善硅负极体积变化的典型策略,包括材料的尺寸控制和复杂的结构,如薄膜、多孔结构、中空结构和复合材料、合金化等,并展望了硅负极材料在锂电池应用未来的机遇和挑战。
silicon is considered to be the most promising anode material for lithium batteries due to its high theoretical energy density,low working potential and abundant resources.The volume of silicon anode material changes greatly in the process of charge and discharge,which leads to the rapid decline of cycle capacity and the increase of internal resistance,which limits the practical application of silicon anode.In this paper,the typical strategies to improve the volume change of silicon anode are introduced,including material size control and complex structures,such as thin film,porous structure,hollow structure and composite materials,alloying,etc.the future opportunities and challenges of silicon anode materials in lithium battery applications are prospected.
作者
樊培贤
梅一丹
张静
孙仲振
张东鹏
Fan Peixian;Mei Yidan;Zhang Jing;Sun Zhongzhen;Zhang Dongpeng(Qinxin Group(Tianjin)New Energy Technology Research Institute Co.,Ltd.,Tianjin 300143;Zhongqi Yan Auto Parts Inspection Center(Ningbo)Co.,Ltd.,Zhejiang Ningbo 315104)
出处
《云南化工》
CAS
2020年第11期135-137,共3页
Yunnan Chemical Technology
关键词
硅负极材料
石墨烯
多孔结构
复合材料
silicon anode material
graphene
porous structure
composite material
