高性能钴铝双金属氢氧化物超级电容器储能性能研究  

High Performance Co-Al Layered Double Hydroxide for Supercapacitor

作　　者：李晶晶 严威 潘姮 曾婷 

机构地区：[1]武汉工程大学化学与环境工程学院,湖北 武汉

出　　处：《材料科学》2024年第4期379-389,共11页Material Sciences

摘　　要：设计高性能电极材料是提高超级电容器比电容的关键,具有挑战性。在此通过简单的共沉淀法制备了具有三维层状结构的电极材料。电化学测试表明,CoAl-LDH电极在1 Ag−1时的比电容可达805.0 Fg−1,循环4000圈后,比电容仅衰减5.7%。将CoAl-LDH作为正极,办公废纸衍生的碳材料AC为负极构建非对称超级电容器。基于CoAl-LDH//AC的非对称超级电容器(ASC)在749.2 W kg−1时具有34.9 Wh kg−1的高能量密度,并且在3000次循环后具有出色的容量保持率95.6%。并由两个串联器件驱动风扇模型和小船模型。Developing high-performance electrode materials is critical to improving the specific capacitance of supercapacitors. In this study, electrode materials with three-dimensionally layered structures were prepared using a simple co-precipitation method. The electrochemical test shows that the specific capacitance of the CoAl-LDH electrode can reach 805.0 F g−1 at the current density of 1 A g−1, with just a 5.7% loss in specific capacitance after 4000 cycles. We have constructed an asymmetric supercapacitor (ASC) utilizing CoAl-LDH as the positive electrode and AC, a carbon material derived from office waste paper as the negative electrode. The CoAl-LDHH//AC-based ASC has a high energy density of 34.9 Wh kg−1 at 749.2 W kg−1 and an excellent capacity retention rate of 95.6% after 3000 cycles. The fan model and the boat model are driven by two connected devices.

关 键 词：层状双氢氧化物 非对称超级电容器 电化学性能 三维结构 

分 类 号：TM5[电气工程—电器]