Three-dimensional annealed WO3 nanowire/graphene foam as an electrocatalytic material for all vanadium redox flow batteries

2017 ◽  
Vol 1 (10) ◽  
pp. 2091-2100 ◽  
Author(s):  
Daniel Manaye Kabtamu ◽  
Yu-Chung Chang ◽  
Guan-Yi Lin ◽  
Anteneh Wodaje Bayeh ◽  
Jian-Yu Chen ◽  
...  
Keyword(s):  
Graphene Sheet ◽  
Tungsten Trioxide ◽  
Low Cost ◽  
Three Dimensional ◽  
Graphene Foam ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

This paper presents a three-dimensional annealed tungsten trioxide nanowire/graphene sheet (3D annealed WO3 NWs/GS) foam as an excellent and low-cost electrocatalyst.

Electrodeposited reduced graphene oxide as a highly efficient and low-cost electrocatalyst for vanadium redox flow batteries

2019 ◽  
Vol 297 ◽  
pp. 31-39 ◽  
Author(s):  
Pooria Moozarm Nia ◽  
Ebrahim Abouzari-Lotf ◽  
Pei Meng Woi ◽  
Yatimah Alias ◽  
Teo Ming Ting ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Low Cost ◽  
Redox Flow Batteries ◽  
Highly Efficient ◽  
Reduced Graphene ◽  
Flow Batteries ◽  
Vanadium Redox

Three-dimensional, transient, nonisothermal model of all-vanadium redox flow batteries

Energy ◽  
2015 ◽  
Vol 81 ◽  
pp. 3-14 ◽  
Author(s):  
Kyeongmin Oh ◽  
Haneul Yoo ◽  
Johan Ko ◽  
Seongyeon Won ◽  
Hyunchul Ju
Keyword(s):  
Three Dimensional ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

Synergistic effects of a TiNb2O7–reduced graphene oxide nanocomposite electrocatalyst for high-performance all-vanadium redox flow batteries

2018 ◽  
Vol 6 (28) ◽  
pp. 13908-13917 ◽  
Author(s):  
Anteneh Wodaje Bayeh ◽  
Daniel Manaye Kabtamu ◽  
Yu-Chung Chang ◽  
Guan-Cheng Chen ◽  
Hsueh-Yu Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Graphene Oxide ◽  
High Performance ◽  
Freeze Drying ◽  
Synergistic Effects ◽  
Low Cost ◽  
Redox Flow Batteries ◽  
Reduced Graphene ◽  
Flow Batteries ◽  
Vanadium Redox

In this study, a simple, low-cost, and powerful titanium niobium oxidereduced graphene oxide (TiNb2O7–rGO) nanocomposite electrocatalyst was synthesized through dispersion and blending in aqueous solution followed by freeze-drying and annealing for all-vanadium redox flow batteries (VRFBs).

scholarly journals The effect of wetting area in carbon paper electrode on the performance of vanadium redox flow batteries: A three-dimensional lattice Boltzmann study

2018 ◽  
Vol 283 ◽  
pp. 1806-1819 ◽  
Author(s):  
Duo Zhang ◽  
Qiong Cai ◽  
Oluwadamilola O. Taiwo ◽  
Vladimir Yufit ◽  
Nigel P. Brandon ◽  
...  
Keyword(s):  
Lattice Boltzmann ◽  
Three Dimensional ◽  
Carbon Paper ◽  
Dimensional Lattice ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

scholarly journals Molybdenum-assisted reduction of VO2+ for low cost electrolytes of vanadium redox flow batteries

2021 ◽  
Author(s):  
Deokhyun Hwang ◽  
Jong-Wook Ha ◽  
Young Soo Park
Keyword(s):  
Fossil Fuels ◽  
Low Cost ◽  
Energy Transition ◽  
Homogeneous Catalyst ◽  
Hydrazine Monohydrate ◽  
One Pot ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Discharge Efficiency ◽  
Vanadium Redox

Abstract Efficient and affordable energy storage systems are indispensable to accomplish a successful energy transition from fossil fuels to renewable sources. Although all-vanadium redox flow batteries (VRFB) possess many distinctive advantages, much improvement in the process for electrolyte preparation is needed to overcome low productivity and complexity of the current electrolysis process. Herein, we demonstrate a simple one-pot process for the preparation of V3.5+ electrolytes from V2O5 by utilizing hydrazine monohydrate as a residue-free reducing agent and molybdenum as a homogeneous catalyst accelerating the reduction of VO2+. It is confirmed that the performance of the electrolytes prepared by the newly developed process is identical to that by electrolysis in terms of charge-discharge efficiency and capacity up to current density of 200 mA cm-2. This study can contribute to the wide spread of VRFB by providing a scalable process suitable for the mass production of V3.5+ electrolyte.

scholarly journals A three-dimensional conducting network of rGO-in-graphite-felt as electrode for vanadium redox flow batteries

2018 ◽  
Vol 4 (1) ◽  
pp. 60-65
Author(s):  
Hongrui Wang ◽  
Wei Ling ◽  
Jizhong Chen ◽  
Zhian Wang ◽  
Xian-Xiang Zeng ◽  
...  
Keyword(s):  
Electrocatalytic Activity ◽  
Three Dimensional ◽  
Rate Capability ◽  
Step Method ◽  
Graphite Felt ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
First Results ◽  
Electrochemical Charge Transfer ◽  
Vanadium Redox

AbstractGraphite felt (GF) with numerous merits has been widely used as electrode in all-vanadium redox flow batteries (VRFB), but its further application is still hindered by its intrinsically poor electrocatalytic activity. Herein, we propose a three-dimensional (3D) conducting network constructed with reduced graphene oxide (rGO) in the GF electrode via a two-step method. The 3D conducting network with abundant oxygen-containing functional groups in the GF is conducive to the transport of electrons between GF fibers and the electrochemical charge transfer to vanadium ions in the composite electrode; it can enhance the electrocatalytic activity and conductivity of GF. The VRFB using 3D rGO modified GF (mGF) electrode exhibited outstanding energy efficiency of 73.4% at a current density of 100 mA·cm−2, which is much higher than that with pristine GF (pGF) (65.4%); and better rate capability. These first results reveal that GF with 3D conducting network shows promising opportunities for the VRFB and other electrochemical flow systems

scholarly journals Conversion of Spent Coffee Beans to Electrode Material for Vanadium Redox Flow Batteries

Batteries ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 56 ◽  
Author(s):  
Vida Krikstolaityte ◽  
Oh Joshua ◽  
Andrei Veksha ◽  
Nyunt Wai ◽  
Grzegorz Lisak ◽  
...  
Keyword(s):  
Surface Area ◽  
Electrode Material ◽  
Low Cost ◽  
Redox Flow Batteries ◽  
Graphite Plate ◽  
Coffee Beans ◽  
Flow Batteries ◽  
Activation Times ◽  
Vanadium Redox ◽  
Kinetics Of

This study presents the application of pyrolyzed spent coffee beans as a potential electrode material to replace commercial bipolar graphite plate in vanadium redox flow batteries (VRB). The results indicate that the biochar obtained from spent coffee beans shows relatively good electrochemical charge transfer kinetics of vanadium redox reactions as well as generates higher energy and voltage efficiency in a static cell test when compared to TF6 bipolar graphite plate. Additionally, the biochar was activated via steam at various activation times to increase its surface area, and their effect on the kinetics of the electrochemical reactions was investigated. The activated carbon did not exhibit any improvement neither in electron transfer kinetics nor in the battery efficiency, despite their increased surface area. The performed studies demonstrate that the biochar obtained from spent coffee beans can be a low-cost electrode material for VRB with improved performance characteristics.

A novel polysulfone–polyvinylpyrrolidone membrane with superior proton-to-vanadium ion selectivity for vanadium redox flow batteries

2016 ◽  
Vol 4 (4) ◽  
pp. 1174-1179 ◽  
Author(s):  
Chunxiao Wu ◽  
Shanfu Lu ◽  
Haining Wang ◽  
Xin Xu ◽  
Sikan Peng ◽  
...  
Keyword(s):  
Low Cost ◽  
Ion Selectivity ◽  
Cycling Test ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Vanadium Ion ◽  
Charge Discharge ◽  
Excellent Stability

Outstanding performance in VRFBs: a novel polysulfone–polyvinylpyrrolidone membrane with high ion selectivity, superior stability and low cost is constructed for VRFBs. The VRFB with the PSF–PVP–50 membrane exhibits impressive CE (98%), EE (89%), and excellent stability during the 2000 h continuous charge–discharge cycling test.

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