增强氧化还原流电池性能,采用新的两离子交换膜
Jingshuai Yang1,2, Zhen Peng1, Weiqin Tang1
1Department of Chemistry, College of Sciences, Northeastern University, Shenyang, 110004, China.
Macromolecular rapid communications
|September 10, 2024
概括
新的两离子交换膜显著提高了氧化还原流电池的性能. 这些膜提供优越的离子选择性和更长的自放电时间,提高整体效率和循环寿命.
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
- 聚合物化学 聚合物化学
背景情况:
- 氧化还原流电池 (VRFB) 对于储能至关重要.
- 分隔膜对VRFB的效率和寿命产生了重大影响.
- 现有的膜经常面临离子透性和稳定性的挑战.
研究的目的:
- 为VRFBs合成新的两离子交换膜.
- 在离子选择性,电阻和透性方面评估这些膜的性能.
- 评估新膜对VRFB运行指标 (如自放电,效率和周期寿命) 的影响.
主要方法:
- 使用硫酸组接种的聚 (p-烯酸) 皮佩里迪尼 (p-terphenyl piperidinium) 合成两离子交换膜.
- 作为聚合物矩阵,使用了无以太的聚 (p-terphenyl piperidine) (PTP).
- 在没有性催化剂的环境友好的四级化中,使用二甲硫酸盐 (ES) 和1,4-butan苏 (BS) 作为接种剂.
主要成果:
- 合成的PTP-ES和PTP-BS膜表现出较低的面积阻力和高的H+透性.
- 实现了异常的离子选择性,PTP-BS显示的离子选择性为4.34 × 10^6 S min cm^-3,比Nafion 115.5高出数量级.
- 使用PTP-BS膜的VRFB表现出190小时的自放电时间 (相对于Nafion 115的86小时) 和高库伦比 (98.1-99.1%) 和能量 (92.0-82.1%) 效率.
结论:
- 两的PTP-BS膜在VRFB应用中表现出了显著的性能特征.
- 膜的优越离子选择性和稳定性显著提高了VRFB的效率和周期寿命.
- 这些发现表明,PTP-BS膜在推进VRFB技术方面有很大的潜力.
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