期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 829, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154536
关键词
Coprecipitation method; LDH; Polypyrrole; Graphene; Supercapacitor
资金
- National Natural Science Foundation of China [61571245]
- Natural Science Foundation of Jiangsu Province [BK20131249]
- Senior Personnel Scientific Research Foundation of Jiangsu University [15JDG084]
- Natural Science Fund Project of Colleges in Jiangsu Province [16KJB430008]
- College Students Innovative Practice Fund of Jiangsu University Industrial Center [ZXJG2019067]
Herein, a novel laminate-like Co-Fe LDH/polypyrrole/graphene oxide (LPG) composite was firstly and successfully synthesized by a simple and effective co-precipitation process in which ultrathin CoFe-layer double hydroxides (LDH) nanosheets were electrostatically assembled on the surface of polypyrrole/graphene oxide (PG) substrate. The optimum LPG-2 electrode exhibits the highest specific capacity (638 C g(-1) at 1 A g(-1)) and excellent cycle stability (85.55% after 4000 cycles). The reason for excellent electrochemical performance of LPG-2 electrode is ascribed to Co-Fe LDH with high conductivity and PG with high specific surface area. The LPG-2//AC ASC was assembled by LPG-2 material as the positive electrode, the activated carbon (AC) as the negative electrode with the potential windows of 0-1.6 V the device exhibits a maximum energy density of 25.7 Wh kg(-1) at a power density of 2800 W kg(-1) and an excellent cycling stability of 83.51% after 10,000 cycles, indicating that the device has excellent rate capability and cycle stability. (C) 2020 Elsevier B.V. All rights reserved.
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