期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 907, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2022.116065
关键词
Composite electrode; Electrochemical; rGO; Electrode; Supercapacitor
资金
- Gdas's Project of Constructing Domestic First-Class Research Institutions [2021GDA-SYL-20210103084]
- Constructing Domestic First-Class Research Institutions [2021GDASYL-20210103081]
- National Natural Science Foundation of China [51472193]
- Research Startup Funds of Wuhan Institute of Technology
- National Key Research and Development Program of China [2020YFE0205300]
- Project of Guangdong Provincial Key Lab-oratory [2017B030314048]
In this study, a hierarchical sandwich-type NiFe layered double hydroxide/reduced graphene oxide (NiFe-LDHs/rGO) composite electrode material was successfully synthesized. The composite electrode exhibited high specific capacitance and good cycling performance. Additionally, an asymmetric supercapacitor assembled with NiFe-LDHs/rGO as the positive electrode demonstrated high energy density and cycling stability. These results indicate the potential application of NiFe-LDHs/rGO composite in high-performance supercapacitors.
Rational design and fabrication of composite electrode materials with high energy storage performance of supercapacitors is of great importance from both theoretical and practical viewpoints. Herein, a hierarchical sandwich-type NiFe layered double hydroxide/reduced graphene Oxide (NiFe-LDHs/rGO) composite electrode materials were successfully synthesized through a one-step hydrothermal method. It is found that the prepared NiFe-LDHs/rGO composite electrode can achieve a high specific capacitance of 1319F g(-1) at 1 A g(-1) and show good cycling performance with a retention rate of 80% over 1000 cycles. Furthermore, the asymmetric supercapacitor based on NiFe-LDHs/rGO as a positive electrode and N-doped hollow carbon sphere as a negative electrode was assembled and exhibited a high energy density of 37 Wh kg(-1) at a power density of 423 W kg(-1) as well as good cycling stability. The exceptional electrochemical performance of the NiFe-LDHs/rGO composite indicates its potential application in high-performance supercapacitors.
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