AUTHOR=Feng Xiaojian , Zhang Zixuan , Zhang Tongxue , Xue Jing , Han Chao , Dai Lei , Wang Ling , He Zhangxing 

TITLE=Enhanced Catalysis of P-doped SnO2 for the V2+/V3+ Redox Reaction in Vanadium Redox Flow Battery

JOURNAL=Frontiers in Chemistry

VOLUME=9

YEAR=2021

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.688634

DOI=10.3389/fchem.2021.688634

ISSN=2296-2646

ABSTRACT=<p>In this work, nanosized P-doped SnO<sub>2</sub> (SnO<sub>2</sub>-P) was prepared by a sol–gel method as a catalyst for the V<sup>3+</sup>/V<sup>2+</sup> redox reaction in vanadium redox flow battery. Compared with SnO<sub>2</sub>, the electrochemical performance of SnO<sub>2</sub>-P is significantly improved. This is because P doping provides more active sites and shows greatly improved electrical conductivity, thereby increasing the electron transfer rate. As a result, SnO<sub>2</sub>-P shows better catalytic performance than SnO<sub>2</sub>. The SnO<sub>2</sub>-P modified cell is designed, and it exhibits an increase of 47.2 mA h in discharge capacity and 8.7% in energy efficiency compared with the pristine cell at 150 mA cm<sup>−2</sup>. These increases indicate that the modified cell has a higher electrolyte utilization rate. This study shows that SnO<sub>2</sub>-P is a new and efficient catalyst for vanadium redox flow battery.</p>