具有分散的离子运输网络的非化膜使得高效和可持续的聚硫化物氧化回氧流电池成为可能
Feiran Wang1, Shuang Luo2, Jiafeng Lei1
1Electrochemical Energy and Interfaces Laboratory, Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, N.T. 999077, Hong Kong SAR, China.
Science advances
|November 5, 2025
概括
研究人员开发了一种低成本的非化膜,用于基于聚硫化物的氧化还原流电池. 这一进步显著改善了循环寿命和能源效率,为可持续的长期储能解决方案铺平了道路.
科学领域:
- 储能 储能 储能 储能 储能 储能
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 基于聚硫化物的氧化还原流电池由于价格实惠的材料,具有长期储能潜力.
- 目前的局限性包括聚硫化物交叉,短周期寿命,以及昂贵的,环境相关的化膜,如Nafion.
- 像Nafion这样的膜的高成本 (800-3500美元/平方米) 阻碍了商业可行性.
研究的目的:
- 开发一种经济高效的非化膜,用于基于聚硫化物的氧化还原流电池.
- 为了克服聚硫化物交叉和依赖昂贵的膜的局限性.
- 提高这些储能系统的循环寿命和效率.
主要方法:
- 开发一种基于硫聚硫 (SPES) 的膜,具有分散的离子运输通道.
- 在聚硫化铁化物氧化还原流电池中测试SPES膜.
- 对离子选择性和成本进行比较分析,与商业纳膜进行比较.
主要成果:
- 与Nafion相比,SPES膜的离子选择性是Nafion的20倍.
- 膜的成本大大降低了 (12美元-66美元/m2).
- 带有SPES膜的电池实现了1600个周期 (>6个月) 的稳定循环,具有高库伦比效率 (>99.9%) 和能量效率 (>75%).
结论:
- 开发的低成本的SPES膜使得基于聚硫化物的氧化还原流电池的寿命创纪录.
- 这种可持续的膜解决方案解决了阻碍实际应用的关键挑战.
- 这些发现为商业化高效且负担得起的长期能源存储铺平了道路.
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