Electrochemical properties of graphite-based electrodes for redox flow batteries
- Electrochemical properties of graphite-based electrodes for redox flow batteries
- Lithium vanadium oxide; Anode material; Lithium battery; Graphite-based electrode; Vanadium redox flow battery
- Issue Date
- Bulletin of the Korean Chemical Society
- VOL 32, NO 2, 571-575
- Graphite-based electrodes were prepared using synthetic graphite (MCMB 1028) or natural graphite (NG) powder using
a dimensionally stable anode (DSA) as a substrate. Their electrochemical properties were investigated in vanadiumbased
electrolytes to determine how to increase the durability and improve the energy efficiency of redox flow batteries.
Cyclic voltammetry (CV) was performed in the voltage range of ‒0.7 V to 1.6 V vs. SCE at various scan rates to analyze
the vanadium redox reaction. The graphite-based electrodes showed a fast redox reaction and good reversibility in a
highly concentrated acidic electrolyte. The increased electrochemical activity of the NG-based electrode for the V4+/V5+
redox reaction can be attributed to the increased surface concentration of functional groups from the addition of conductive
material that served as a catalyst. Therefore, it is expected that this electrode can be used to increase the power
density and energy density of redox flow batteries.
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