A recast Nafion/graphene oxide composite membrane for advanced vanadium redox flow batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (5) ◽  
pp. 3756-3763 ◽  
Author(s):  
Lihong Yu ◽  
Feng Lin ◽  
Ling Xu ◽  
Jingyu Xi
Keyword(s):  
Graphene Oxide ◽  
Hydrogen Bonds ◽  
Composite Membrane ◽  
Mechanical Stability ◽  
Oxide Composite ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Vanadium Ions

GO nanosheets in Nafion effectively block the crossover of vanadium ions while hydrogen bonds between GO and Nafion increase the mechanical stability, significantly improving the efficiency and cyclability in a rNafion/GO membrane based VRFB.

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

Influences of Permeation of Vanadium Ions through PVDF-g-PSSA Membranes on Performances of Vanadium Redox Flow Batteries

2005 ◽  
Vol 109 (43) ◽  
pp. 20310-20314 ◽  
Author(s):  
Xuanli Luo ◽  
Zhengzhong Lu ◽  
Jingyu Xi ◽  
Zenghua Wu ◽  
Wentao Zhu ◽  
...  
Keyword(s):  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Vanadium Ions

High ionic selectivity of low permeable organic composite membrane with amphiphilic polymer for vanadium redox flow batteries

2018 ◽  
Vol 324 ◽  
pp. 69-76 ◽  
Author(s):  
Ho-Young Jung ◽  
Min-Sun Cho ◽  
T. Sadhasivam ◽  
Ju-Young Kim ◽  
Sung-Hee Roh ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Amphiphilic Polymer ◽  
Ionic Selectivity ◽  
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 Exploration of reduced graphene oxide microparticles as electrocatalytic materials in vanadium redox flow batteries

2021 ◽  
Author(s):  
Amira Alazmi ◽  
Charles Wan ◽  
Pedro Costa ◽  
Fikile Brushett
Keyword(s):  
Graphene Oxide ◽  
Critical Point ◽  
Reduced Graphene Oxide ◽  
Surface Area ◽  
Reaction Rates ◽  
Redox Flow Batteries ◽  
Reduced Graphene ◽  
Critical Point Drying ◽  
Flow Batteries ◽  
Vanadium Redox

Augmenting reaction rates on porous carbon electrodes is critical for reducing the cost of all-vanadium redox flow batteries (VRFBs). To this end, reduced graphene oxide (rGO) based carbons hold promise, demonstrating high specific surface area, chemomechanical stability, and electrochemical activity. While initial efforts have shown that rGOs can enhance VRFB performance, the range of unique processing conditions leads to a collection of materials with disparate elemental composition and porous structure, thus obscuring performance-determining characteristics behind redox reactions and frustrating the development of generalizable design principles. Here, we generate rGO electrocatalysts of nearly identical chemical composition but different textures (i.e., surface area and pore structure) by varying the drying step in the graphene synthesis (i.e., vacuum-drying vs. carbon dioxide critical point drying). We apply spectroscopic and electrochemical techniques on the synthesized rGOs, observing a three-fold increase in BET surface area using critical point drying. We subsequently decorate carbon felt electrodes – both pristine and thermally activated – with rGO microparticles via a flow deposition procedure, and evaluate their performance and durability in a VRFB cell. The synthesis approach and findings described in this work inform and complement efforts to advance the material science and engineering of rGO electrocatalysts.

scholarly journals Electrochemical oscillation of vanadium ions in anolyte

2017 ◽  
Vol 7 (3) ◽  
pp. 139 ◽  
Author(s):  
Hao Peng ◽  
Zuohua Liu ◽  
Changyuan Tao
Keyword(s):  
Power Consumption ◽  
Chemical Dissolution ◽  
Redox Flow Batteries ◽  
New Methods ◽  
Oscillation Phenomenon ◽  
Flow Batteries ◽  
First Time ◽  
Vanadium Redox ◽  
Electrochemical Oscillation ◽  
Vanadium Ions

<p><span lang="EN-GB">Periodic electrochemical oscillation of the anolyte was reported for the first time in a simulated charging process of the vanadium redox flow batteries. The electrochemical oscillation could be explained in terms of the competition between the growth and the chemical dissolution of V<sub>2</sub>O<sub>5</sub> film. Also, the oscillation phenomenon was possible to regular extra power consumption. The results of this paper might enable new methods to improve the charge efficiency and energy saving for vanadium redox flow batteries.</span></p>

Doping structure and degradation mechanism of polypyrrole–Nafion® composite membrane for vanadium redox flow batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (105) ◽  
pp. 103332-103336 ◽  
Author(s):  
Qinglong Tan ◽  
Shanfu Lu ◽  
Yang Lv ◽  
Xin Xu ◽  
Jiangju Si ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Degradation Mechanism ◽  
Ion Permeability ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox ◽  
Enhanced Conductivity ◽  
Vanadium Ion

The proton-acid doping structure of PPY endowed the HPPY–N212 membrane with enhanced conductivity as well as reduced vanadium ion permeability.

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