稳定了耐用和高性能性膜燃料电池和水电解剂的催化剂层
Chuan Hu1, Hyun Woo Kang2, Seung Won Jung1
1Department of Energy Engineering, College of Engineering, Hanyang University, Seoul 04763, Republic of Korea.
ACS central science
|April 1, 2024
概括
阳离子交换膜 (AEM) 燃料电池和水电解仪显示出更好的耐用性和性能. 在现场交叉连接策略提高了催化剂层的稳定性,提高了设备的寿命和效率.
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
- 能源转换 能源转换
背景情况:
- 阳离子交换膜 (AEM) 燃料电池 (AEMFC) 和水电解器 (AEMWE) 在性能和耐用性方面面临挑战.
- 现有的研究重点是AEM和催化剂,往往忽视了催化剂层的稳定性.
- 增强的催化剂层附着性对于长期设备运行至关重要.
研究的目的:
- 开发一个现场交叉连接策略,以改善基于AEM的设备中的催化剂层稳定性.
- 调查增强催化剂层粘附对AEMFC和AEMWE性能和耐久性的影响.
- 为了在催化剂层和AEM之间建立共价键,以获得卓越的界面完整性.
主要方法:
- 采用了现场交叉连接策略,以加强催化剂层和AEM之间的相互作用.
- 催化剂层的粘附强度在交叉链接之前和之后被量化.
- 对AEMFC和AEMWE进行了长期稳定性测试,使用交叉链接的催化剂层.
主要成果:
- 交叉连接显著提高了因共价键形成的催化剂层粘附强度的七倍.
- 经过修改的AEMFC在0.6 A cm−2下稳定运行1000小时,低压衰变率为20μV h−1.1,低压衰变率为20μV h−1.
- AEMWE在2.0V时达到15.17A cm-2的峰值电流密度,并在各种电流密度下保持稳定的运行1000小时.
结论:
- 现场交叉连接策略有效地提高了AEM设备中的催化剂层稳定性和附着性.
- 这种方法显著提高了AEM燃料电池和水电解剂的耐用性和性能.
- 这些发现为推进基于AEM的电化学能量转换技术提供了有希望的途径.
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