Cited 0 time in webofscience Cited 0 time in scopus

Hierarchical oxygen rich-carbon nanorods: Efficient and durable electrode for all-vanadium redox flow batteries

Title
Hierarchical oxygen rich-carbon nanorods: Efficient and durable electrode for all-vanadium redox flow batteries
Authors
Aziz, Md. AbdulHossain, Syed ImdadulShanmugam, Sangaraju
DGIST Authors
Shanmugam, Sangaraju
Issue Date
2020-01
Citation
Journal of Power Sources, 445
Type
Article
Article Type
Article
Author Keywords
Vanadium redox flow batteryNCNRCarbon felt electrodeElectrochemical activity
Keywords
HIGH-PERFORMANCE ELECTRODEGRAPHITE FELTPOSITIVE ELECTRODEOXIDENANOFIBERSZEINNANOPARTICLESSELECTIVITYCATALYSTSMEMBRANE
ISSN
0378-7753
Abstract
We describe the fabrication of hierarchical oxygen and nitrogen enriched-carbon electrode materials from zein and polyacrylonitrile by a simple electrospinning technique for durable and high rate all-vanadium redox flow batteries (VRBs). The nitrogen-doped carbon nanorods (NCNR) provide abundant oxygen-rich and nitrogen active sites, and thereby, enhancing the catalytic activity toward both VO2+/VO2+ and V2+/V3+ ion redox reactions by improving ion transfer kinetics and faster electron transfer rate in VRB. With improving electrocatalytic properties, the NCNR decorating carbon felt electrode (NCNR/CF) exhibits excellent battery performance with an impressive specific capacity of 37.3 Ah L−1 than pristine CF (22.8 Ah L−1) and CNR/CF (28.6 Ah L−1) electrodes. The NCNR/CF electrode also shows an outstanding coulombic efficiency (CE, 98.9%) and energy efficiency (EE, 84.3%) compared with the pristine CF (CE, 91.2% and EE, 73.4%) and the CNR/CF (CE, 95.6% and EE, 81.2%) electrodes in the VRB at 40 mA cm−2 current density. Furthermore, the NCNR/CF electrode exhibits 10.9 and 3.1% higher EE as compared to the pristine CF and CNR/CF electrodes, respectively. Therefore, the impressive cyclic rate capability with negligible capacity decay proves the superiority of NCNR as a potential electrode material for all-vanadium redox flow batteries. © 2019 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/10974
DOI
10.1016/j.jpowsour.2019.227329
Publisher
Elsevier BV
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE