硫化 styrene-grafted 聚乙烯化物共聚合物用于AQDS/氧化回氧流电池的质子交换膜
Francesca Niccolai1,2, Elisa Guazzelli1, Andrea Cesari1
1Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, 56124, Italy.
Macromolecular rapid communications
|December 28, 2024
概括
硫化 styrene-grafted poly ((乙烯化) 共聚合物显示出作为半有机氧化还原流电池 (RFB) 的质子交换膜 (PEM) 的前景. 这些新型膜提供低氧化还原物种交叉和良好的能源效率,与商业基准竞争.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 聚合物化学 聚合物化学
背景情况:
- 质子交换膜 (PEM) 是氧化还原流电池 (RFB) 中的关键组件.
- 开发具有成本效益和高性能的PEM对于推进RFB技术至关重要.
- 目前的PEM面临与成本,稳定性和活跃物种交叉相关的挑战.
研究的目的:
- 为半有机RFB合成和描述新型硫化 styrene-grafted poly ((维尼利丁化物) (pVDF) 共聚合物作为PEM.
- 评估硫化度 (DS) 对膜性质和性能的影响.
- 为了比较这些新的PEM与RFB应用中的商业基准的性能.
主要方法:
- 在pVDF骨干上使用原子转移激素聚合物化对 styrene 的移植聚合.
- 移植的聚钢侧链的硫化,以创建硫化 styrene (SSty) 单位.
- 将共聚合物溶液成具有不同DS的PEM.
- 对PEM的全面描述 (热,机械,吸水,离子交换能力).
- 在单细胞RFB中进行电化学测试,使用9,10-二-2,7-二硫酸 (AQDS) /氧化还原对.
主要成果:
- pVDF-g-(Sty26-co-SSty14) 的共聚合物膜显示了氧化还原物种 (AQDS/) 的低交叉.
- 开发的PEM在RFB单细胞测试中表现出良好的欧姆电阻和高能效.
- 膜特性 (吸水,离子交换) 可以通过硫化度 (DS) 来调整.
- 在特定指标上,性能与商业膜如Nafion 115和Aquivion E87-12s相美或优于它们.
结论:
- 化 styrene-grafted pVDF 共聚物是半有机 RFB 中 PEM 的可行的替代品.
- 由于DS的可调性,可以优化RFB应用的膜特性.
- 这些新型材料为实现更高效,潜在成本更低的RFB提供了有希望的途径.
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