改性铜集流体应用于锂离子电池研究进展

Research Progress in Application of Modified Copper Current Collector in Lithium-Ion Batteries

随着社会发展和科技进步,能源的过度消耗引发资源和环境问题。近年来,电动汽车等新能源领域的蓬勃发展,促进了电化学储能技术的开发应用。锂离子电池(LIBs)被认为是目前最可靠的先进可充电储能器件之一。在LIBs中,集流体发挥着至关重要的作用,它连接着LIBs内外电子通路,是活性电极材料的支撑基底。目前,商业铜箔作为集流体已经无法满足人们对高性能储能器件的性能要求。因此,对LIBs铜集流体进行改性,是一种解决其性能不足和部分电池缺陷问题的可行方法。由于碳基材料具有高导电性和高机械强度等优点,与铜材料能够实现良好结合和性能过渡,被认为是最契合的优秀改性材料。本文介绍了LIBs中存在的常见问题,针对这些问题,系统总结了近年来铜集流体改性方法,主要包括碳基材料改性以及铜集流体表面改性和结构改性。对于铜集流体碳基材料改性,总结了近年来众多突出成果,包括应用于改性过程中的不同碳纳米材料及其制备过程,以及影响碳纳米材料改性铜基集流体性能的诸多因素。最后对铜集流体在LIBs中的应用和发展趋势进行了展望。

With social development and technological progress,excessive energy consumption has also brought about resource and environmental problems.In recent years,the vigorous development of new industries such as electric vehicles have also promoted the development and application of electrochemical energy storage technology.Lithium-ion batteries(LIBs)are considered the most advanced rechargeable energy storage devices.In LIBs,current collector plays a crucial role as it connects the internal and external electronic pathways of LIBs and serves as the support substrate for active electrode materials.Currently,commercial copper foil as a collector cannot meet people´s requirements for higher performance energy storage devices.Therefore,modifying LIBs copper collectors to address issues such as insufficient performance and battery defects is a feasible method.Due to the advantages of high conductivity and high mechanical strength,carbon-based materials are one of the excellent modified materials.This article introduced the common problems in LIBs and systematically analyzed the methods for modifying copper collectors in recent years,mainly including carbon based material modification and other effective modification methods,and for the field of copper based collector and carbon based material modification,outstanding achievements made by many researchers in recent years have been summarized,involving different carbon nanomaterials and their preparation processes applied in the modification process,as well as many factors affecting the performance of copper based collector modified by carbon nanomaterials.Finally,the development trend of copper collector fluid application in LIBs in the future was prospected.