流场设计和可视化流通式水性有机氧化还原流电池
Kang Peng1, Chenxiao Jiang1, Zirui Zhang1
1Key Laboratory of Precision and Intelligent Chemistry, Department of Applied Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, P. R. China.
概括
工程师为水性有机氧化还原流电池 (AORFB) 设计了一个新的流场,以改善电解质分布和功率密度. 这种优化的设计提高了性能,使更高的充电率能够更好地储存能量.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性有机氧化还原流电池 (AORFB) 由于有机电解质的快速动力学,可以提供高性能储能.
- 在AORFB中,质量运输的局限性阻碍了性能,特别是用于无机电解质的传统流场.
- 当使用标准流场时,可能会发生严重的细胞两极分化,从而损害了AORFB的效率.
研究的目的:
- 设计和优化流域,用于流通型AORFBs.
- 为了提高电解质的均分布和在多孔电极内的流动.
- 为了克服质量传输的局限性,并减少AORFBs的细胞极化.
主要方法:
- 用了三维多物理模拟来设计流场.
- 采用操作成像来可视化电解质流动力学.
- 制造并测试了一种原型pH中性TEMPTMA/MV电池,具有优化的流量场.
主要成果:
- 优化的流量场具有多步分布式通道和点接触块,以实现均的流量.
- 观察到明显减少的局部度过强的潜能.
- 在一个原型的TEMPTMA/MV电池中实现了267.3mW cm−2的峰值功率密度.
- 在高达300 mA cm-2的电流密度下启用充电,超越了传统设计.
结论:
- 设计的流量场对于通过解决大众运输限制来提高AORFB性能至关重要.
- 该研究强调了细胞堆工程在AORFB开发中的重要性.
- 可视化方法为未来的水流电池设计提供了宝贵的见解.
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