Carbon paper decorated with tin dioxide particle via in situ electrodeposition as bifunctional electrode for vanadium redox flow battery

2019 ◽  
Vol 44 (3) ◽  
pp. 2100-2109 ◽  
Author(s):  
Xinkuai He ◽  
Zhangxing He ◽  
Qingtian Zou ◽  
Luye Wu
Keyword(s):  
Tin Dioxide ◽  
Vanadium Redox Flow Battery ◽  
Carbon Paper ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

In Situ Single Electrode Studies of an All-Vanadium Redox Flow Battery

2019 ◽  
Vol 41 (23) ◽  
pp. 43-51 ◽  
Author(s):  
Douglas S. Aaron ◽  
Zhijiang Tang ◽  
Jamie S. Lawton ◽  
Alexander P. Papandrew ◽  
Thomas A. Zawodzinski
Keyword(s):  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

scholarly journals In-Situ Tools Used in Vanadium Redox Flow Battery Research—Review

Batteries ◽  
2021 ◽  
Vol 7 (3) ◽  
pp. 53
Author(s):  
Purna C. Ghimire ◽  
Arjun Bhattarai ◽  
Tuti M. Lim ◽  
Nyunt Wai ◽  
Maria Skyllas-Kazacos ◽  
...  
Keyword(s):  
Energy Storage ◽  
Cell Performance ◽  
Vanadium Redox Flow Battery ◽  
Ex Situ ◽  
Diagnostic Tools ◽  
Research Review ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

Progress in renewable energy production has directed interest in advanced developments of energy storage systems. The all-vanadium redox flow battery (VRFB) is one of the attractive technologies for large scale energy storage due to its design versatility and scalability, longevity, good round-trip efficiencies, stable capacity and safety. Despite these advantages, the deployment of the vanadium battery has been limited due to vanadium and cell material costs, as well as supply issues. Improving stack power density can lower the cost per kW power output and therefore, intensive research and development is currently ongoing to improve cell performance by increasing electrode activity, reducing cell resistance, improving membrane selectivity and ionic conductivity, etc. In order to evaluate the cell performance arising from this intensive R&D, numerous physical, electrochemical and chemical techniques are employed, which are mostly carried out ex situ, particularly on cell characterizations. However, this approach is unable to provide in-depth insights into the changes within the cell during operation. Therefore, in situ diagnostic tools have been developed to acquire information relating to the design, operating parameters and cell materials during VRFB operation. This paper reviews in situ diagnostic tools used to realize an in-depth insight into the VRFBs. A systematic review of the previous research in the field is presented with the advantages and limitations of each technique being discussed, along with the recommendations to guide researchers to identify the most appropriate technique for specific investigations.

Highly Active Electrode With Efficiently Added Surface Oxygen Groups for a Vanadium Redox Flow Battery

2019 ◽  
Vol 17 (3) ◽  
Author(s):  
Hirokazu Ishitobi ◽  
Satoshi Sugawara ◽  
Kosuke Oba ◽  
Takumi Hirano ◽  
Honoka Doki ◽  
...  
Keyword(s):  
Vanadium Redox Flow Battery ◽  
Carbon Paper ◽  
Surface Oxygen ◽  
Redox Flow Battery ◽  
Air Oxidation ◽  
Flow Battery ◽  
Surface Oxygen Groups ◽  
Kinetic Resistance ◽  
Oxygen Groups ◽  
Vanadium Redox

Abstract Higher power output by a lower kinetic resistance of the vanadium redox flow battery is needed for its commercialization. In this study, we focused on the air oxidation conditions of carbon paper, which is the electrode material, to reduce the kinetic resistance. The air oxidation is considered to affect the number of surface oxygen groups such as the phenol-type hydroxyl group due to oxidation of the carbon fiber. The surface oxygen groups may correspond to the active sites for the charge/discharge reaction. We quantitatively evaluated the number of surface oxygen groups by temperature-programmed desorption. In addition, we measured the double-layer capacitances of the carbon papers, which may reflect the surface area of the carbon fiber. The single-cell performances, i.e., current–voltage curves and charge–discharge profile, of the electrodes were studied. The air oxidized carbon paper, heat-treated at 500 °C for 3 h (8.4% mass decrease from the pristine sample), showed the highest power density (960 mW cm−2) in this study with thin electrode material (ca., 0.2 mm for one sheet). The negative half-reaction was enhanced by air oxidation. This result could be explained by the reduction of the kinetic resistance by increasing the number of phenol groups, and this power output was relatively high as the vanadium redox flow battery by using a commercial carbon paper and the standard flow field.

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