Cobalt-tungsten diselenide-supported nickel foam as a battery-type positive electrode for an asymmetric supercapacitor device: comparison with various MWSe2 (M = Ni, Cu, Zn, and Mn) on the structural and capacitance characteristics

Nanoscale
Mani SakthivelKuo-Chuan Ho

Abstract

New exploration in nanomaterial research has been greatly encouraged so as to discover active electrode materials with extraordinary properties and performances. In this report, we demonstrated the synthesis of different transition metal-incorporated MWSe2 (M = Co, Ni, Cu, Zn, and Mn) and studied them using various characterization techniques. Subsequently, the proposed bimetallic chalcogenides were successfully applied as the active electrode materials for pseudocapacitor applications. The results of the electrochemical studies showed that CoWSe2 exhibited a higher specific capacitance of 3309.58 F g-1 at a constant applied current density of 1.35 A g-1, which is 1.07, 1.76, 2.04, 8.7, and 12.28-fold higher than that of NiWSe2, CuWSe2, ZnWSe2, MnWSe2, and pristine WSe2, respectively. The interconnected nanosheet structure with voids facilitates rich active sites for efficient electrolyte uptake and superior charge transfer during the faradaic redox reaction. In addition, the cycle stability of CoWSe2/NF was studied and the retention capacitance of about 82.1% was recorded, which is higher than that of NiWSe2 (60.4%), CuWSe2 (50.12%), ZnWSe2 (46.44%), MnWSe2 (40.12%), and pristine WSe2 (31.2%). Owing to the higher specific capa...Continue Reading

References

Nov 20, 2001·Nature·M S Dresselhaus, I L Thomas
Sep 21, 2002·Chemical Communications : Chem Comm·M Nath, C N Rao
Aug 3, 2010·Nanoscale Research Letters·Shiquan WangSeungjoo Kim
Jan 3, 2013·Nanoscale Research Letters·Luis Rosales, Jhon W González
Jul 1, 2017·Chemical Communications : Chem Comm·Prashanth W MenezesMatthias Driess
Feb 20, 2019·Frontiers in Chemistry·Gustav EmilssonAndreas Dahlin

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Methods Mentioned

BETA
scanning
transmission electron microscopy
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