| 锑离子添加剂对低共熔溶剂（DES）电解液液流电池的性能改善研究 |
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| 引用本文： | 纪燕男,孙培茁,马强,张玮琦,苏华能,徐谦.锑离子添加剂对低共熔溶剂（DES）电解液液流电池的性能改善研究[J].化工学报,2021,72(6):3368-3379. |
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| 作者姓名： | 纪燕男 孙培茁 马强 张玮琦 苏华能 徐谦 |
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| 作者单位： | 1.南通理工学院电气与能源工程学院，江苏 南通 226002;2.江苏大学能源研究院，江苏 镇江 212013 |
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| 基金项目： | 国家自然科学基金项目(51676092);江苏省“六大人才高峰”项目(2016-XNY-015) |
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| 摘 要： | 非水系氧化还原液流电池（NARFB）的广泛应用受制于其较低的性能。在电解液中加入一些金属离子添加剂是一种可能的解决方案。实验研究了Sb3+离子对低共熔溶剂（DES）电解液液流电池电化学性能的影响。结果表明，添加Sb3+离子可以强化V（Ⅲ）/V（Ⅱ）氧化还原离子对的电化学反应动力学（最高可达22.6％）过程，钒离子在DES中的扩散系数提高了63.3％，并且电荷转移电阻降低了11.9％。场发射扫描电子显微镜表明，Sb3+离子电沉积在石墨毡的表面，对电化学反应起催化作用，从而改善了电化学性能。考虑增强的动力学和降低的活性比表面积之间的平衡，确定了Sb3+的最佳浓度为15 mmol·L-1。此外，当使用含有Sb3+的负极电解液液流电池时，液流电池的功率密度提高了31.2%，从含原始电解质的3.08 mW·cm-2到含15 mmol·L-1 Sb3+离子的4.04 mW·cm-2。这些结果为改善NARFB的电池性能提供了一个便捷而有前景的方法。
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| 关 键 词： | 低共熔溶剂（DES） 氧化还原液流电池（RFB） 锑离子 电池性能 |
| 收稿时间： | 2020-10-26 |
Improving the performance of a deep eutectic solvent (DES)-electrolyte non-aqueous redox flow battery by antimony ion additive |
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| JI Yannan,SUN Peizhuo,MA Qiang,ZHANG Weiqi,SU Huaneng,XU Qian.Improving the performance of a deep eutectic solvent (DES)-electrolyte non-aqueous redox flow battery by antimony ion additive[J].Journal of Chemical Industry and Engineering(China),2021,72(6):3368-3379. |
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| Authors: | JI Yannan SUN Peizhuo MA Qiang ZHANG Weiqi SU Huaneng XU Qian |
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| Affiliation: | 1.School of Electrical and Energy Engineering, Nantong Institute of Technology, Nantong 226002, Jiangsu, China;2.Institute for Energy Research, Jiangsu University, Zhenjiang 212013, Jiangsu, China |
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| Abstract: | The wide application of non-aqueous redox flow battery (NARFB) is restricted by its lower performance. Adding some metal ion additives to the electrolyte is a possible solution. In this study, the influence of Sb3+ ions on the electrochemical performance of non-aqueous redox flow batteries (NARFBs) was experimentally studied. The results showed that the electrochemical reaction kinetics of V(Ⅲ)/ V(Ⅱ) redox couple is enhanced by the addition of Sb3+ (up to 22.6%), the diffusion coefficient of vanadium ions also increases (up to 63.3%) and the charge transfer resistance decreases (up to 11.9%). The field emission scanning electron microscope shows that Sb ions are electrodeposited on the surface of graphite felt, which contributes a catalytic effect on the electrochemical reaction so as to improve the electrochemical performance. Due to the trade-off between the enhanced kinetics and reduced active surface area, the optimum concentration of Sb3+ ions is found to be 15 mmol·L-1. In addition, the flow battery assembled with negative electrolyte containing Sb3+ ions exhibits 31.2% higher power density, from 3.08 mW·cm-2 with pristine electrolyte, to 4.04 mW·cm-2 with 15 mmol·L-1 Sb3+ ions in the electrolyte. These results provide a convenient and promising method for improving the battery performance of NARFB. |
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| Keywords: | deep eutectic solvent (DES) redox flow battery (RFB) antimony ions cell performance |
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