超级电容器
材料科学
电容
电极
煅烧
功率密度
纳米复合材料
电化学
化学工程
电流密度
氧化物
纳米技术
化学
冶金
催化作用
物理化学
热力学
物理
工程类
功率(物理)
量子力学
生物化学
作者
Wang Jinjin,Tianfeng Ye,Shao Yanqun,Zhiyuan Lu,Yuting Lin,Huixuan Wu,Guoyong Li,Kongfa Chen,Dian Tang
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2021-12-13
卷期号:168 (12): 120553-120553
被引量:5
标识
DOI:10.1149/1945-7111/ac42a4
摘要
RuO 2 is well known to be an active and expensive metal oxide. In the paper, ZnCo 2 O 4 /RuO 2 nanocomposites were synthesized by simple hydrothermal, impregnation and calcination methods. Due to the multifunctional bridge structure, RuO 2 could not only effectively inhibit the volume change of ZnCo 2 O 4 in long-term work but also provide more redox active sites. The forbidden bandwidth was reduced and the conductivity was improved after doping RuO 2 . Compared with ZnCo 2 O 4 , the density of state of ZnCo 2 O 4 /RuO 2 tended to a higher energy level. ZnCo 2 O 4 /3 wt% RuO 2 electrode exhibited an excellent specific capacitance (1346.56 F g −1 ) and cyclic stability in 6 M KOH aqueous solution. For the first time, the electrochemical performance of ZnCo 2 O 4 /RuO 2 //IrO 2 -ZnO ASC has been evaluated in two-electrode configurations. The supercapacitor exhibited an excellent energy density of 40.89 W h kg −1 at the power density of 740 W kg −1 and a high capacitance retention of 87.5% even after 7000 cycles at a scanning rate of 100 mV s −1 . The ZnCo 2 O 4 /RuO 2 was a promising electrode material for supercapacitors.
科研通智能强力驱动
Strongly Powered by AbleSci AI