Journal
JOURNAL OF POWER SOURCES
Volume 401, Issue -, Pages 278-286Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.08.091
Keywords
Graphitic mesoporous carbon; Polyaniline; Composite; Supercapacitors
Funding
- National Natural Science Foundation of China [51872049]
- Natural Science Foundation of Fujian Province of China [2017J01478]
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A three-dimensional conductive network-based ordered polyaniline (PANI) nanorods/graphitic mesoporous carbon (GMC) composite is successfully fabricated by the introduction of PANI into a low-cost GMC with a highly fluffy and porous structure, and the effects of the GMC content on the electrochemical performance are investigated using the as-prepared composite as active material. Results show that the unique structure of the composite is beneficial to ion and electron transport as well as redox reactions during charge-discharge process. The composite containing 15 wt% GMC exhibits a high specific capacitance of 715 F g(-1) at a current density of 1 A g(-1) and remains 429 F g(-1) at 10 A g(-1) (60.0% retention). Furthermore, the composite shows excellent cycling stability with a high capacitance retention of up to 93.6% at 100 mV s(-1) after 10000 cycles, and exhibits a coulombic efficiency in excess of 90% after 2500 cycles at a current density of 3 A g(-1). More importantly, the composite presents a high energy density of 24.64 W h kg(-1) at a power density of 250 W kg(-1) and 13.79 W h kg(-1) at 5000 W kg(-1), which is highly competitive with other reported PANI/carbon composite electrodes.
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