Stability of Vanadium Electrolytes in the Vanadium Redox Flow Battery

2013 ◽  
Vol 1492 ◽  
pp. 25-31
Author(s):  
Shu-Yuan Chuang ◽  
Chih-Hsing Leu ◽  
Kan-Lin Hsueh ◽  
Chun-Hsing Wu ◽  
Hsiao-Hsuan Hsu ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Negative Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Oxidation Rates ◽  
Visible Spectra ◽  
Uv Visible ◽  
The Stability ◽  
Vanadium Redox

ABSTRACTThe stability of the negative electrode electrolyte affects the efficiency and capacity of energy storage in the vanadium redox flow battery (VRFB) system. To explore the stability of vanadium electrolytes, the study prepared five types of V(II) electrolytes that were exposed to air in a fixed open area and monitored the charge state of vanadium ions over time by UV/Visible spectrophotometer. This study succeeded in preparing pure V(II) electrolytes. Five characteristics are found in the UV/Visible spectra, respectively, during the oxidation process from V(II) electrolytes to V(III) electrolytes and V(III) electrolytes to V(IV) electrolytes. The experimental results show that the oxidation rate of a solution of 1 M V(II) electrolytes to V(III) electrolytes and 1 M V(III) electrolytes to V(IV) electrolytes under an atmosphere of air is 4.79 and 0.0089 mol/h per square meter. The oxidation rates of 0.05-1 M V(II) electrolytes to V(III) electrolytes are approximately 96-538 times than that of V(III) electrolytes to V(IV) electrolytes.

scholarly journals GO-modified membranes for vanadium redox flow battery

2019 ◽  
Vol 90 ◽  
pp. 01004 ◽  
Author(s):  
Saidatul Sophia ◽  
Ebrahim Abouzari Lotf ◽  
Arshad Ahmad ◽  
Pooria Moozarm Nia ◽  
Roshafima Rasit Ali
Keyword(s):  
Low Cost ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
The Stability ◽  
High Flexibility ◽  
Vanadium Redox ◽  
Vanadium Ion ◽  
Excellent Stability

Graphene oxide (GO) has attracted tremendous attention in membrane-based separation field as it can filter ions and molecules. Recently, GO-based materials have emerged as excellent modifiers for vanadium redox flow battery (VRFB) application. Its high mechanical and chemical stability, nearly frictionless surface, high flexibility, and low cost make GO-based materials as proper materials for the membranes in VRFB. In VRFB, a membrane acts as the key component to determine the performance. Therefore, employing low vanadium ion permeability with excellent stability membrane in vanadium electrolytes is important to ensure high battery performance. Herein, recent progress of GO-modified membranes for VRFB is briefly reviewed. This review begins with current membranes used for VRFB, followed by the challenges faced by the membranes. In addition, the transport mechanism of vanadium ion and the stability properties of GO-modified membranes are also discussed to enlighten the role of GO in the modified membranes.

Carbon Felt Coated with Titanium Dioxide/Carbon Black Composite as Negative Electrode for Vanadium Redox Flow Battery

2014 ◽  
Vol 161 (6) ◽  
pp. A1132-A1138 ◽  
Author(s):  
Tung-Mo Tseng ◽  
Rong-Hsin Huang ◽  
Chung-Yen Huang ◽  
Chung-Chiun Liu ◽  
Kan-Lin Hsueh ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Carbon Black ◽  
Negative Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Carbon Felt ◽  
Flow Battery ◽  
Vanadium Redox

Improvement of Titanium Dioxide Addition on Carbon Black Composite for Negative Electrode in Vanadium Redox Flow Battery

2013 ◽  
Vol 160 (8) ◽  
pp. A1269-A1275 ◽  
Author(s):  
Tung-Mo Tseng ◽  
Rong-Hsin Huang ◽  
Chung-Yen Huang ◽  
Kan-Lin Hsueh ◽  
Fuh-Sheng Shieu
Keyword(s):  
Titanium Dioxide ◽  
Carbon Black ◽  
Negative Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

scholarly journals A polyoxometalate redox flow battery: functionality and upscale

Clean Energy ◽  
2019 ◽  
Vol 3 (4) ◽  
pp. 278-287 ◽  
Author(s):  
Jochen Friedl ◽  
Felix L Pfanschilling ◽  
Matthäa V Holland-Cunz ◽  
Robert Fleck ◽  
Barbara Schricker ◽  
...  
Keyword(s):  
Large Cell ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Operational Parameters ◽  
Flow Battery ◽  
Membrane Area ◽  
Redox Flow Batteries ◽  
The Stability ◽  
Power Densities ◽  
Vanadium Redox

Abstract While redox flow batteries carry a large potential for electricity storage, specifically for regenerative energies, the current technology-prone system—the all-vanadium redox flow battery—exhibits two major disadvantages: low energy and low power densities. Polyoxometalates have the potential to mitigate both effects. In this publication, the operation of a polyoxometalate redox flow battery was demonstrated for the polyoxoanions [SiW12O40]4– (SiW12) in the anolyte and [PV14O42]9– (PV14) in the catholyte. Emphasis was laid on comparing to which extent an upscale from 25 to 1400 cm2 membrane area may impede efficiency and operational parameters. Results demonstrated that the operation of the large cell for close to 3 months did not diminish operation and the stability of polyoxometalates was unaltered.

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