CoAl-LDHs基超级电容器电极材料研究进展

Research progress of CoAl-LDHs supercapacitor electrode materials

超级电容器具有高的功率密度、快速的充放电能力以及良好的循环稳定性等优点。而钴铝双金属氢氧化物(CoAl-LDHs)作为超级电容器的电极材料,具有良好的电化学稳定性,比如具有较好的电荷和质量输运性能以及较高的比电容和良好的循环稳定性等。本文综述了CoAl-LDHs超级电容器电极材料的不同制备方法及其性能,其中包括:水热法、共沉淀法、均匀沉淀法、溶胶-凝胶法以及离子交换法,还对不同的制备方法进行了比较。同时也总结了CoAl-LDHs不同的改性方法,包括:碳材料改性、金属掺杂改性、Ni(OH)_(2)改性以及MoS_(2)改性。通过比较不同制备方法的优缺点和所制备材料结构、电化学性能的差异,对CoAl-LDHs电极材料的相关研究进行系统的归纳总结,并对今后CoAl-LDHs超级电容器电极材料未来的发展方向进行了展望。

Supercapacitors have many advantages,such as high power density,fast charge discharge ability and good cycle stability.Cobalt aluminum double hydroxides(CoAl-LDHs)as electrode materials of supercapacitors have good electrochemical stability,such as good charge and mass transport properties,high specific capacitance and good cycle stability.In this paper,different preparation methods and properties of CoAl-LDHs electrode materials for supercapacitors are reviewed,including hydrothermal method,coprecipitation method,homogeneous precipitation method,sol-gel method and ion exchange method.At the same time,different modification methods of CoAl-LDHs are summarized,including carbon material modification,metal doping modification,Ni(OH)_(2) modification and MoS_(2) modification.By comparing the advantages and disadvantages of different preparation methods and the differences in the structure and electrochemical performance of the prepared materials,the related research of CoAl-LDHs electrode materials is systematically summarized,and the future development direction of CoAl-LDHs electrode materials for supercapacitors is prospected.