摘要
Graphene under high temperature was prepared and loaded on Ni foam.Then,cobalt tetroxide precursor was grown on Ni foam in situ by the hydrothermal method.Finally,the sample was burned at high temperature to obtain Co_(3)O_(4)+graphene@Ni.The hydrothermal method used in this paper is easy to operate,with low-risk factors and environmental protection.The prepared Co_(3)O_(4)+graphene@Ni electrode exhibits superior electrochemical performance than Co_(3)O_(4)@Ni electrode.At a current density of 1 A/g,the specific capacitance of the Co_(3)O_(4)+graphene@Ni electrode calculated by a charge-discharge test is 935 F/g,which is much larger than that of Co_(3)O_(4)@Ni electrode of 340 F/g.
超级电容器作为新型储能装置,具有充电速度快、温度特性好等优点。过渡非贵金属氧化物,如四氧化三钴等,具有储量丰富、价格低廉且环境友好的优点,但过渡金属氧化物导电性较差,所以一般与导电性较好的碳材料复合。本文在泡沫镍上负载石墨烯,用水热法在已经负载石墨烯的泡沫镍片上原位生长Co_(3)O_(4) 。采用循环伏安测试、恒电流充放电测试研究了Co_(3)O_(4) @石墨烯@泡沫镍复合电极材料的电化学性能,复合电极呈现赝电容的特性,在电流密度为1 A/g时,Co_(3)O_(4) @石墨烯@泡沫镍复合电极材料比电容可达931 F/g。
作者
CHI Li-ping
YUAN Meng
FU Jie
JIN Ya-zhou
ZHAO Si-yu
XU Fen
WANG Shao-xu
迟莉萍;袁梦;傅杰;晋亚州;赵思雨;徐芬;王韶旭(College of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China;College of Environmental and Chemical Engineering,Dalian Jiaotong University,Dalian 116028,China;Guangxi Key Laboratory of Information Materials(Guilin University of Electronic Technology),China)
基金
Project(21502014)supported by the National Natural Science Foundation of China
Projects(20180550736,2019-ZD 0117)supported by the Natural Science Foundation of Liaoning Province,China
Projects(JDL 2019004,JDL 2017027)supported by the Research Foundation of Educational Committee of Liaoning Province,China
Project(191008-K)supported by Guangxi Key Laboratory of Information Materials(Guilin University of Electronic Technology),China。
