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Effect of organophosphorus compound additives for thermal stability on the positive electrolyte of a vanadium redox flow battery

Title
Effect of organophosphorus compound additives for thermal stability on the positive electrolyte of a vanadium redox flow battery
Author
이윤정
Keywords
Additive; 3-Aminopropylphosphonic acid; Thermal stability
Issue Date
2018-06
Publisher
SPRINGER
Citation
JOURNAL OF APPLIED ELECTROCHEMISTRY, v. 48, no. 9, page. 1019-1030
Abstract
3-Aminopropylphosphonic acid (3APPA) and sodium 3-phosphonopropionate (3PPA-Na) are investigated as organophosphorus compound additives in a positive electrolyte of a vanadium redox flow battery (VRFB) to improve its thermal stability. The precipitation-inhibiting effects of 2 M vanadium electrolytes, including the above additives, are studied by UV-Vis spectroscopy, Raman spectrophotometry, cyclic voltammetry (CV), and charge-discharge cycling test in the redox flow battery. The UV-Vis spectroscopy and Raman spectrophotometry show that no new substances formed in both the V(IV) and V(V) electrolytes with 3APPA and 3PPA-Na additives. Cyclic voltammetry (CV) shows the electrochemical activity and reversibility of the electrolytes with and without the additives. In the flow cell, the discharge capacity retention values in the positive electrolyte after 100 cycles at 45 A degrees C are 56.7, 64.7, and 48.4% in 3PPA-Na, 3APPA, and without the additives, respectively. These results indicate that the 3APPA additive increases the discharge capacity retention to more than 16% compared to the electrolyte without the additive due to the retardation of precipitation at the high temperature.
URI
https://link.springer.com/article/10.1007%2Fs10800-018-1227-xhttp://repository.hanyang.ac.kr/handle/20.500.11754/118989
ISSN
0021-891X; 1572-8838
DOI
10.1007/s10800-018-1227-x
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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