控制金属氧化活性聚合物溶液中的电荷透:微观多电解质动态对宏观能量储存的影响
Adolfo I B Romo1, Liliana Bello1, Sanja Pudar1
1Joint Center for Energy Storage Research, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, United States.
Journal of the American Chemical Society
|June 11, 2024
概括
研究了含有金属的氧化还原活性聚合物 (M-RAP) 的高能量密度非水性氧化还原流电池. 性能与金属类型 (Ru,Fe,Co) 和电解质度相关,为电池设计提供了洞察力.
科学领域:
- 电化学
- 材料科学
- 聚合物化学
背景情况:
- 可溶性氧化还原活性聚合物 (RAP) 是高能量密度非水性氧化还原流电池 (NaRFB) 的关键.
- RAP 的电荷存储和电子传输能力受吊组设计的影响.
- 含有金属的RAP (M-RAP) 为电池应用提供可调节的氧化还原特性.
研究的目的:
- 研究 NaRFB 中的 M-RAP (M = Ru, Fe, Co) 的电化学行为.
- 了解电解质度和离子强度对M-RAP电荷转移动态的影响.
- 将M-RAP特性与NaRFB性能进行相关联.
主要方法:
- 使用超微电极评估电流响应的循环电压测量和时速测量.
- 电解质度和离子强度变化的实验.
- 动力蒙特卡洛和布朗动力学模型模拟电荷转移.
- 基于M-RAP的NaRFB的制造和测试
主要成果:
- 目前的反应量为Ru-RAP > Fe-RAP ≫ Co-RAP,与小分子氧化还原趋势保持一致.
- 具有离子强度变化的非单调电流行为表明了多电解动力学.
- 电解质度显著影响了RAP的微观结构,影响了实验趋势.
- NaRFB的平均电位为1.54V (Ru-RAP),1.37V (Fe-RAP) 和0.52V (Co-RAP).
结论:
- 电解质度和聚合物微观结构对NaRFB中的M-RAP电荷转移具有重要影响.
- 该研究为流动电池系统中优化RAP提供了一个框架.
- M-RAP显示出高性能储能的潜力,其性能可根据金属选择和电解质条件进行调节.
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