高性能双极膜开发,改善水分离
Yingying Chen1, Jacob A Wrubel1, W Ellis Klein1
1National Renewable Energy Laboratory, Golden, Colorado 80401, United States.
ACS applied polymer materials
|March 4, 2024
概括
使用氧化石墨烯 (GO) 作为催化剂开发了高性能双极膜 (BPM). 三维BPM显示出卓越的电化学性能和稳定性,用于CO2电解等应用.
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:
- 双极膜 (BPM) 对电化学设备在分离和能量转换方面至关重要.
- 开发高性能BPM对于推进这些技术至关重要.
- 石墨烯氧化物 (GO) 在BPM中显示出作为水解离催化剂的潜力.
研究的目的:
- 开发高性能的二维 (2D) 和三维 (3D) BPM.
- 为了研究石墨烯氧化物 (GO) 加载对BPM性能的影响.
- 评估开发的BPM对电化学应用 (包括二氧化碳电解) 的适用性.
主要方法:
- 通过热压制制造2D BPM,通过电制造3D BPM.
- 将石墨烯氧化物 (GO) 纳入BPM连接处作为催化剂.
- 使用电压-电流 (V-I) 曲线和电化学阻抗光谱的电化学表征.
主要成果:
- 对2D BPM的最佳GO负载是100μg cm-2,平衡性能和机械强度.
- GO催化2D BPM与商业BPM性能相匹配,最高可达500 mA cm-2.2.
- 3D BPM表现出优越的性能,具有较低的阻力,更高的水解离效率和增强的稳定性.
结论:
- 石墨烯氧化物有效催化BPM中的水解离.
- 3D BPM在电化学性能和机械稳定性方面提供了显著的改进.
- 开发的3D BPM对如二氧化碳电解等高电流密度应用具有前景.
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