Journal
JOURNAL OF POWER SOURCES
Volume 329, Issue -, Pages 516-524Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2016.08.111
Keywords
Carbon materials; Hierarchical porosity; Polyaniline; Freestanding; Supercapacitors
Funding
- National Basic Research Program of China (973 Program) [2012CB933703]
- National Natural Science Foundation of China [91233204, 51272041, 61201107, 11304035, 51572045]
- 111 Project [B13013]
- Fundamental Research Funds for the Central Universities [12SSXM001]
- Natural Science Foundation of Jilin Province of China [20160101313JC]
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Freestanding hierarchically porous carbon electrode materials with favorable features of large surface areas, hierarchical porosity and continuous conducting pathways are very attractive for practical applications in electrochemical devices. Herein, three-dimensional freestanding hierarchically porous carbon (HPC) materials have been fabricated successfully mainly by the facile phase separation method. In order to further improve the energy storage ability, polyaniline (PANI) with high pseudocapacitance has been decorated on HPC through in situ chemical polymerization of aniline monomers. Benefiting from the synergistic effects between HPC and PANI, the resulting HPC/PANI composites as electrode materials present dramatic electrochemical performance with high specific capacitance up to 290 Fg(-1) at 0.5 Ag-1 and good rate capability with similar to 86% (248 Fg(-1)) capacitance retention at 64 A g(-1) of initial capacitance in three-electrode configuration. Moreover, the as-assembled symmetric supercapacitor based on HPC/PANI composites also demonstrates good capacitive properties with high energy density of 9.6 Wh kg(-1) at 223 W kg(-1) and long-term cycling stability with 78% capacitance retention after 10 000 cycles. Therefore, this work provides a new approach for designing high-performance electrodes with exceptional electrochemical performance, which are very promising for practical application in the energy storage field. (C) 2016 Elsevier B.V. All rights reserved.
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