Facile synthesis of polyaniline nanotubes using reactive oxide templates for high energy density pseudocapacitors
KAUST DepartmentMaterials Science and Engineering Program
Physical Sciences and Engineering (PSE) Division
Advanced Membranes and Porous Materials Research Center
Functional Nanomaterials and Devices Research Group
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AbstractA remarkable energy density of 84 W h kg(cell) -1 and a power density of 182 kW kg(cell) -1 have been achieved for full-cell pseudocapacitors using conducting polymer nanotubes (polyaniline) as electrode materials and ionic liquid as electrolytes. The polyaniline nanotubes were synthesized by a one-step in situ chemical polymerization process utilizing MnO2 nanotubes as sacrificial templates. The polyaniline-nanotube pseudocapacitors exhibit much better electrochemical performance than the polyaniline-nanofiber pseudocapacitors in both acidic aqueous and ionic liquid electrolytes. Importantly, the incorporation of ionic liquid with polyaniline-nanotubes has drastically improved the energy storage capacity of the PAni-nanotube pseudocapacitors by a factor of ∼5 times compared to that of the PAni-nanotube pseudocapacitors in the acidic aqueous electrolyte. Furthermore, even after 10000 cycles, the PAni-nanotube pseudocapacitors in the ionic liquid electrolyte maintain sufficient high energy density and can light LEDs for several minutes, with only 30 s quick charge. © 2013 The Royal Society of Chemistry.
SponsorsThe authors would like to thank Mr Qingxiao Wang, Dr Lan Zhao and Dr Yang Yang from KAUST Imaging and Characterization Core Facility for their help with HRTEM, Raman, and FTIR characterization, and Dr Hua Tan from the Analytical Chemistry Core Laboratory for his help with BET analysis. W. C. acknowledges support from the KAUST Graduate Fellowship. R. B. Rakhi acknowledges support from SABIC Postdoctoral Fellowship. H. A. acknowledges the support from KAUST baseline fund.
PublisherRoyal Society of Chemistry (RSC)
JournalJournal of Materials Chemistry A