Quantification of Chlorine Gas Generation in Mixed-Acid Vanadium Redox Flow Batteries

被引：2
作者：
Wittman, Reed M. [2 ]
Poirier, Cassandria [1 ]
Pratt III, Harry D.
Anderson, Travis M. [1 ]
Preger, Yuliya [2 ]
机构：
[1] Sandia Natl Labs, Power Sources R&D, Albuquerque, NM 87185 USA
[2] Sandia Natl Labs, Energy Storage Technol & Syst, Albuquerque, NM 87185 USA
来源：
ACS APPLIED ENERGY MATERIALS | 2023年 / 6卷 / 06期
关键词：
Redox Flow Battery; Battery Safety; Mixed-Acid Electrolyte; Vanadium; Gas Evolution; Chlorine Gas; ALL-VANADIUM; ENERGY DENSITY;
D O I：
10.1021/acsaem.2c03152
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Mixed-acid vanadium redox flow batteries (VRFBs) are an attractive option to increase energy density and temperature stability relative to conventional VRFBs for grid energy storage applications. However, the inclusion of hydrochloric acid introduces a significant safety risk through chlorine gas (Cl2) evolution. Here, we present the first direct measurements of Cl2 generation in a mixed-acid VRFB. Cl2 is generated through an electrochemical reaction when the system is charged above similar to 74% state of charge with concentrations exceeding 3% of the system headspace. We explore how Cl2 evolution is enabled and propose mitigation strategies.
引用
收藏
页码：3167 / 3172
页数：6
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