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首页> 外文期刊>RSC Advances >Fundamental properties of TEMPO-based catholytes for aqueous redox flow batteries: effects of substituent groups and electrolytes on electrochemical properties, solubilities and battery performance
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Fundamental properties of TEMPO-based catholytes for aqueous redox flow batteries: effects of substituent groups and electrolytes on electrochemical properties, solubilities and battery performance

机译：用于氧化还原电池水溶液的速度基础结构的基本性质：取代基和电解质对电化学性能，溶解度和电池性能的影响

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摘要

Water-soluble 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) derivatives have been frequently utilized as catholytes for aqueous redox flow batteries to achieve cost-effective renewable energy storage. However, fundamental knowledge of TEMPO derivatives is still largely underdeveloped. Herein, a comprehensive study on the properties of TEMPO derivatives has been conducted in aqueous electrolytes. The results confirm that the redox potential, diffusion coefficient, electron transfer rate constant and solubility are clearly influenced by functional groups of TEMPO derivatives and supporting electrolytes. The charge-discharge cycling performance is evaluated using a symmetric redox flow battery configuration. The capacity decay for TEMPO-based catholytes is mainly derived from the crossover of the oxidized state. The presented study not only advances an in-depth understanding of TEMPO-based RFB applications, but also highlights the challenge of crossover of redox-active TEMPO derivative molecules applied in aqueous RFBs.
机译：水溶性的2,2,6-6-四甲基哌啶-1-氧基（Tempo）衍生物经常用作氧化还原流量水溶液的阴离子，以实现具有成本效益的可再生能量储存。然而，节奏衍生物的基本知识仍然很大程度上不发达。这里，在水性电解质中进行了关于Tempo衍生物的性质的综合研究。结果证实，氧化还原电位，扩散系数，电子转移率恒定和溶解度明显受到节奏衍生物的官能团和支持电解质的官能团的影响。使用对称的氧化还原流电池配置来评估充电放电循环性能。基于速度的阴极物的容量衰减主要来自氧化状态的交叉。本研究不仅可以进展对基于节奏的RFB应用的深入了解，而且还突出了在含水RFB中施用的氧化还原活性节奏衍生物分子的交叉的挑战。

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  • 来源
    《RSC Advances》 |2020年第37期|共6页
  • 作者

    Zhou Wenbo; Liu Wenjie; Qin Meng; Chen Zhidong; Xu Juan; Cao Jianyu; Li Jun;

  • 作者单位

    Changzhou Univ Jiangsu Key Lab Adv Catalyt Mat &

    Technol Sch Petrochem Engn Changzhou 213164 Peoples R China;

    Changzhou Univ Jiangsu Key Lab Adv Catalyt Mat &

    Technol Sch Petrochem Engn Changzhou 213164 Peoples R China;

    Changzhou Univ Jiangsu Key Lab Adv Catalyt Mat &

    Technol Sch Petrochem Engn Changzhou 213164 Peoples R China;

    Changzhou Univ Jiangsu Key Lab Adv Catalyt Mat &

    Technol Sch Petrochem Engn Changzhou 213164 Peoples R China;

    Changzhou Univ Jiangsu Key Lab Adv Catalyt Mat &

    Technol Sch Petrochem Engn Changzhou 213164 Peoples R China;

    Changzhou Univ Jiangsu Key Lab Adv Catalyt Mat &

    Technol Sch Petrochem Engn Changzhou 213164 Peoples R China;

    Sun Yat Sen Univ Sch Intelligent Syst Engn Shenzhen 518000 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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