高性能CoAl-LDH六边形纳米片超级电容器电极材料的制备

摘要

CoAl-LDH nanosheet electrode material with better dispersity and uniformity in size (about 2 μm)is prepared by a facile coprecipitation method.The result of electrochemical measurements in three-electrode con-figuration shows that the CoAl-LDH nanosheet electrode exhibits the specific capacitance of 723 F/g at a current density of 1 A/g,and the capacitance retention rate up to 72% when the current density increases to 20 A/g. The CoAl-LDH nanosheet electrode material is expected to be the optional electrode material of high perform-ance supercapacitor.%采用简单的共沉淀法,制备了分散性良好且尺寸均一的钴铝层状双金属氢氧化物(CoAl-LDH)六边形纳米片电极材料,其尺寸约为2 μm.三电极体系电化学测试结果表明,在电流密度为1 A/g 时,CoAl-LDH 纳米片电极材料的质量比电容为723 F/g,电流密度增加至20 A/g 时,电容保持率高达72%.CoAl-LDH 纳米片电极材料有望成为组装高性能超级电容器的可选电极材料.