Effect of Heteroatom Doped Graphite Electrode Prepared By Ultrasonication on Energy Efficiency of Vanadium Redox Flow Battery

2020 ◽  
Vol MA2020-01 (3) ◽  
pp. 485-485
Author(s):  
Sung Nam Lim ◽  
Kiyoung Kim ◽  
Ju Young Woo ◽  
Shin Ae Song
Keyword(s):  
Energy Efficiency ◽  
Graphite Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery

2016 ◽  
Vol 13 (4) ◽  
Author(s):  
S. Kumar ◽  
S. Jayanti
Keyword(s):  
Energy Efficiency ◽  
Pressure Drop ◽  
Flow Field ◽  
Peak Power ◽  
Low Pressure ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrolyte Circulation ◽  
Vanadium Redox

In this paper, we present experimental studies of electrochemical performance of an all-vanadium redox flow battery cell employing an active area of 103 cm2, activated carbon felt, and a novel flow field, which ensures good electrolyte circulation at low pressure drops. Extended testing over 151 consecutive charge/discharge cycles has shown steady performance with an energy efficiency of 84% and capacity fade of only 0.26% per cycle. Peak power density of 193 mW cm−2 has been obtained at an electrolyte circulation rate of 114 ml min−1, which corresponds to stoichiometric factor of 4.6. The present configuration of the cell shows 20% improved in peak power and 30% reduction in pressure drop when compared to a similar cell with a different electrode and a serpentine flow field.

An electrochemically activated graphite electrode with excellent kinetics for electrode processes of V(ii)/V(iii) and V(iv)/V(v) couples in a vanadium redox flow battery

RSC Advances ◽  
2014 ◽  
Vol 4 (98) ◽  
pp. 55666-55670 ◽  
Author(s):  
Huijun Liu ◽  
Lingxu Yang ◽  
Qian Xu ◽  
Chuanwei Yan
Keyword(s):  
Functional Groups ◽  
Graphite Electrode ◽  
Electrochemical Activity ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrode Processes ◽  
Redox Couples ◽  
Vanadium Redox ◽  
Vanadium Ion

The electrochemical activity and the reversibility for electrode processes of vanadium ion redox couples are significantly enhanced on an EAGE, which is due to the functional groups of COOH and CO introduced on its surface.

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