BARC/PUB/2020/0884

 
 

The role of carbon nanotubes in enhanced charge storage performance of VSe2: experimental and theoretical insight from DFT simulations

 
     
 
Author(s)

Sree Raj, K. A.; Shajahan, A. S.; Chakraborty, B.; and others
(HP&SRPD)

Source

RSC Advances, 2020. Vol. 10 (53): pp. 31712-31719

ABSTRACT

Herein, we report the hybrid structure of metallic VSe2 and multi-walled carbon nanotube (MWCNT) based hybrid materials for high performance energy storage and high power operation applications. The dominance of capacitive energy storage performance behaviour of VSe2/MWCNT hybrids is observed. A symmetric supercapacitor cell device fabricated using VSe2/80 mg MWCNT delivered a high energy density of 46.66 W h kg-1 and a maximum power density of 14.4 kW kg-1 with a stable cyclic operation of 87% after 5000 cycles in an aqueous electrolyte. Using density functional theory calculations we have presented structural and electronic properties of the hybrid VSe2/MWCNT structure. Enhanced states near the Fermi level and higher quantum capacitance for the hybrid structure contribute towards higher energy and power density for the nanotube/VSe2.

 
 
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