水性氧化还原流细胞使用由聚胺醇膜启用的维达酸
Simon Kunz1,2, Trung Tuyen Bui2, Dominik Emmel3
1Institute of Physical Chemistry and Center for Materials Research, Justus Liebig University Giessen, Heinrich-Buff-Ring 17, 35392, Giessen, Germany.
ChemSusChem
|May 21, 2024
概括
这项研究探讨了水性氧化还原流电池 (RFB) 中的 verdazyl . 与Nafion相比,聚胺醇 (PBI) 膜具有更高的稳定性和性能,可以有效地储存能量.
科学领域:
- 电化学和能量储存 电化学和能量储存
- 用于电池的材料科学
背景情况:
- 使用 verdazyl 基的非水性有机氧化还原流电池 (RFB) 对能量存储具有前景.
- 酸性水性电解质中的弗达酸及其膜相互作用仍然未得到充分研究.
研究的目的:
- 为了研究1,3,5-triphenylverdazyl和商业Nafion 211和聚胺醇 (PBI) 膜之间的相互作用.
- 为了提高使用 verdazyl 的水性 RFB 的性能.
主要方法:
- 对1,3,5-triphenylverdazyl离子与Nafion 211,mPBI和OPBI膜的相互作用进行了系统的研究.
- 用KOH和H3PO4进行膜预处理的评估4.
- 实验室规模的对称RFB细胞测试,以评估容量保留和I-V曲线.
主要成果:
- 纳菲安211显著吸收了 verdazylium 阴离子,导致导电性损失.
- mPBI和OPBI膜表现出化学稳定性和可忽略的 verdazylium的吸收.
- 对PBI膜的KOH预处理增强了离子导电性和减少了阴离子吸收/透.
结论:
- 与Nafion 211相比,基于聚胺醇 (PBI) 的膜为含有1,3,5-三甲酸的水性RFB提供了优越的循环稳定性.
- 在酸性电解质中含有 verdazyl 的低成本 PBI 膜实现了高循环稳定性 (2% d-1 容量衰减),性能优于非水性系统.
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