All-vanadium redox flow batteries with graphite felt electrodes treated by atmospheric pressure plasma jets
Journal
Journal of Power Sources
Journal Volume
274
Pages
894-898
Date Issued
2015
Author(s)
Abstract
Graphite felts modified with atmospheric pressure plasma jets (APPJs) are applied as electrodes in an all-vanadium redox flow battery (VRFB). APPJ flow penetrates deeply into the graphite felt, improving significantly the wettability of the graphite felt inside out and, thereby, enhancing graphite fiber-electrolyte contact during battery operation. The energy efficiency of a VRFB was improved from 62% (untreated) to 76% (APPJ-treated with the scan mode) at a current density of 80 mA cm-2, an improvement of 22%. The efficiency improvement is attributed to the oxygen-containing groups and nitrogen doping introduced by N2 APPJs on the fiber surfaces of graphite felt, both of which enhance electrochemical reactivity. ? 2014 Elsevier B.V.
Subjects
All-vanadium redox flow battery
Atmospheric pressure plasma jet
Electrode
Graphite felt
SDGs
Other Subjects
Atmospheric movements; Atmospheric pressure; Electrochemical electrodes; Electrodes; Electrolytes; Energy efficiency; Felt; Felts; Graphite; Graphite electrodes; Plasma jets; Vanadium; All vanadium redox flow battery; Atmospheric pressure plasma jets; Battery operation; Efficiency improvement; Electrochemical reactivity; Electrolyte contacts; Graphite felts; Oxygen containing groups; Flow batteries
Type
journal article