期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 80, 期 -, 页码 545-550出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2019.08.027
关键词
Redox flow battery; TEMPO; Lithium-RFB
资金
- National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [2017R1A2B3006469]
- Fundamental R&D Program for Core Technology of Materials [10077545]
- Construction Technology Research Project - Ministry of Land, Infrastructure and Transport, Republic of Korea [18SCIP-B146646-01]
- KU-KIST research program of Korea Institute of Science and Technology (KIST)
- KIST
- Industrial Strategic Technology Development Program - Ministry of Knowledge Economy
- Korea Institute of Science and Technology (KIST)
- National Research Foundation of Korea [2017R1A2B3006469] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Non-aqueous lithium-ion redox flow batteries (Li-RFBs) have recently garnered much interest because of their high operating voltage and energy density. Albeit these outstanding advantages, challenges, such as poor cyclability and efficiency, still remain in employing the practical application. In an attempt to address these problems, a series of 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) and TEMPO derivatives catholytes were prepared and investigated as redox-active materials. Electrochemical evaluation exhibited that the introduction of polar and electron-withdrawing substituents to TEMPO was able to enhance the rate capability and cycling stability, when compared to those with the neat TEMPO. Extensive analysis of the electrochemical properties revealed that the electrophilic heteroatom stabilized the radical as well as alleviated the catholyte degradation. Overall, a careful selection of redox-active species demonstrates great promise in improving the current redox flow battery technology. (C) 2019 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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