多孔膜使选择性和稳定的零间隙酸性CO2电解剂成为可能
Shilei Wei1, Hang Hua1, Yuxuan Zhao1
1Institute of Photoelectronic Thin Film Devices and Technology, State Key Laboratory of Photovoltaic Materials and Cells, Tianjin Key Laboratory of Efficient Utilization of Solar Energy, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Nankai University, Tianjin, 300350, China.
酸性电解剂中的新型多孔膜 (PM) 克服了在其他系统中看到的二氧化碳损失和不稳定性问题. 这为工业应用提供了高效,稳定和可扩展的二氧化碳电解.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 零间隙膜电极组件 (MEA) CO2电解剂提供高效率,但在离子交换膜 (AEM) 中存在碳酸盐运输问题,限制了碳利用.
- 使用阴离子交换膜 (CEM) 的酸性解离子电解剂解决了二氧化碳的损失,但面临着进化和盐沉等稳定性挑战.
研究的目的:
- 引入一个多孔膜 (PM) 作为一个稳定的替代品,以CEMs在酸性解二氧化碳电解剂.
- 评估基于PM的酸性电解剂的性能和稳定性,以实现高效的二氧化碳转化.
主要方法:
- 一个多孔膜 (PM) 的制造和整合到一个酸性解质MEA CO2电解器中.
- 在电流密度为100 mA的电化学性能测试时,cm-2为200小时.
- 运行机制的分析,包括水透和离子转移.
主要成果:
- 在100 mA cm-2下连续运行200小时,没有盐沉.
- 保持了近100%的CO选择性,证明了高碳利用效率.
- 在大型设备 (100厘米2) 中证实了稳定的性能.
结论:
- 多孔膜提供了一个可行的解决方案,用于稳定和高效的酸性二氧化碳解电解.
- 增强的水透和双向离子转移是提高稳定性的关键机制.
- 开发的系统为高性能,可扩展的CO2电解器提供了一种可行的方法.
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