Highly Efficient Quasi-Solid-State Asymmetric Supercapacitors Based on MoS2 /MWCNT and PANI/MWCNT Composite Electrodes

Nanoscale Research Letters
Bing ChengGentian Yue

Abstract

Molybdenum disulfide (MoS2) and polyaniline (PANI) electrodes were decorated with multi-walled carbon nanotubes (MWCNTs) on the basis of a facial hydrothermal and in situ polymerization methods and served in the asymmetric supercapacitor (ASC). The MoS2 and MWCNTs with a mole ratio of 1:1 in MoS2|MWCNTs electrode exhibited better electrochemical properties through extensive electrochemical studies, in terms of the highest specific capacitance of 255.8 F/g at 1 A/g, low internal resistance, and notable electrochemical stability with retention of the initial specific capacitance at 91.6% after 1000 cycles. The as-prepared PANI|MWCNTs electrode also exhibited good specific capacitance of 267.5 F/g at 1 A/g and remained 97.9% capacitance retention after 1000 cycles. Then, the ASC with MoS2|MWCNTs and PANI|MWCNTs composite electrodes were assembled with polyvinyl alcohol (PVA)-Na2SO4 gel electrolyte, which displayed good electrochemical performance with the specific capacitance of 138.1 F/g at 1 A/g, and remained the energy density of 15.09 Wh/kg at a high power density of 2217.95 W/kg. This result shows that this ASC device possesses excellent electrochemical properties of high energy density and power output and thus showing a pot...Continue Reading

References

Apr 15, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Yingzhi LiDajun Chen
Mar 6, 2012·ChemSusChem·Arunabha Ghosh, Young Hee Lee
Jul 22, 2015·ACS Applied Materials & Interfaces·Mark A BissettRobert A W Dryfe
May 11, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Ramesh OraonGanesh Chandra Nayak
Mar 1, 2017·Advanced Materials·Nitin ChoudharyJayan Thomas

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