摘要
锂金属电池因其高能量密度优势而备受关注,但金属锂高活性和电化学循环过程中枝晶生长问题制约了其实际应用。铜集流体的研究对提升锂金属电池的安全性具有重要意义,能够起到调控局部电流密度从而影响锂离子分布的作用。本文针对平面铜集流体的固有缺陷,介绍了铜集流体改性策略的主要研究进展,并指出设计三维结构集流体能有效降低电流密度但暴露了更多活性界面,增强集流体亲锂性可以降低锂成核过电位但对设备具有较高要求,构建铜集流体表面改性层可以有效隔离电解液但对电池长期稳定性的影响有待进一步考量,因此铜集流体的优化还需进一步研究。
Lithium metal batteries have attracted much attention due to their high energy density,but the high activity of lithium metal and the dendritic growth problem during cycling process restrict their practical application.The research of copper collector is of great significance to improve the safety of lithium metal batteries,and can play a role in regulating the local current density and thus affect the distribution of lithium ions.In view of the inherent defects of planar copper collector,this paper reviews the main research progress of copper collector modification strategy.The article points out that the design of three-dimensional structure collector can effectively reduce the current density but expose more active interfaces.Enhancing the lithium affinity of the collector can reduce the lithium nucleation overpotential,but it has higher requirements for the equipment.The construction of copper collector surface modification layer can effectively isolate the electrolyte,but its impact on the long-term stability of the battery needs to be further considered,so the optimization of copper collector needs to be further studied.
作者
林雨
李想
代化
曹子怡
Lin Yu;Li Xiang;Dai Hua;Cao Ziyi(Wuhan Institute of Marine Electric Propulsion,Wuhan 430064,China;Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《船电技术》
2024年第11期16-19,共4页
Marine Electric & Electronic Engineering
关键词
铜集流体
锂金属电池
面优化
Copper current collector
lithium metal batteries
interface optimization
