在具有非化结合剂的回氧向流电池中增强固体助推器的利用.
Julia Lorenzetti1,2, Paweł P Ziemiański1, Cédric Kupferschmid1
1Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland.
概括
结合剂的选择显著影响了氧化还原向流量电池 (RTFB) 的性能. 非化结合剂,如聚烯,提高了固体提升剂的利用率和储能效率.
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:
- 反氧化定向流量电池 (RTFB) 提供了电网规模储能的潜力.
- 固体氧化还原活性材料的使用不足限制了RTFB的效率.
研究的目的:
- 研究粘合剂选择对RTFB固体提升器利用的影响.
- 确定粘合剂特性和反应动力学之间的关系.
主要方法:
- 合成的LiFePO4/FePO4复合增强剂具有各种结合剂.
- 通过静电循环评估了助推器利用率.
- 使用现场UV-Vis光谱分析了反应动力学.
- 评估材料的多孔性和水友性.
主要成果:
- 结合剂的水友性与固体材料的利用直接相关.
- 与PVDF相比,非化结合剂 (聚烯酸,纤维素) 的 LiFePO4 转化率高达175%.
- 在高达10 mA cm-2.2的循环速率下观察到更好的容量利用率.
结论:
- 粘合剂的水友性是优化RTFB性能的一个关键设计参数.
- 非化,可生物降解的粘合剂为RTFB增强剂配方提供了可持续和高效的替代品.
- 这项研究为通过粘合剂工程提高RTFB效率提供了直接途径.
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