Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 5, Issue 17, Pages 8467-8476Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am4028235
Keywords
nanostructured polyaniline; graphene; carbon nanotubes; interfacial polymerization; activation; asymmetric supercapacitor
Funding
- National Natural Science Foundation of China [51173042]
- Shanghai Municipal Science and Technology Commission [12nm0504102]
- Fundamental Research Funds for the Central Universities
- Innovation Program of Shanghai Municipal Education Commission [11ZZ55]
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Hierarchical sulfonated graphene nanosheet/carboxylated multiwalled carbon nanotube/polyaniline (sGNS/cMWCNT/PANI) nanocomposites were synthesized through an interfacial polymerization method. Activated porous graphene (aGNS) was prepared by combining chemical foaming, thermal reduction, and KOH activation. Furthermore, we have successfully, fabricated an asymmetric supercapacitor (ASC) using sGNS/cMWCNT/PAN1 and aGNS as the positive and negative electrodes, respectively. Because of its unique structure, high capacitive performance, and complementary potential window, the ASC device can be cycled reversibly at a cell voltage of 1.6 V in a 1 M H2SO4 aqueous electrolyte, delivering a high energy density of 20.5 Wh kg(-1) at a power density of 25 kW kg(-1). Moreover, the ASC device also exhibits a superior long cycle life with 91% retention of the initial specific capacitance after 5000 cycles.
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