调节 CoTe 的工作功能,作为可充电空气电池的双功能电催化剂
Tiantian Xiong1, Xianwei Li2, Zhiyong Ma3
1College of Materials Science and Engineering, State Key Laboratory of New Textile Materials & Advanced Processing Technology, Wuhan Textile University, Wuhan 430200, China; Hubei Hydrogen Energy Technology Innovation Center, Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo RD, Wuhan 430074, China.
Journal of colloid and interface science
|June 5, 2024
概括
这项研究开发了一种可充电气电池 (ZAB) 的新型 Telluride 催化剂 (Co-CoTe@3DPC). 新的催化剂表现出增强的氧催化和稳定性,为工业应用铺平了道路.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 可充电的空气电池 (ZAB) 面临着工业化的挑战,原因是氧气电催化剂动力学缓慢,稳定性差.
- 开发高效和耐用的电催化剂对于推进ZAB技术至关重要.
研究的目的:
- 为了提高基于 telluride (CoTe) 的电催化剂的性能,用于ZABs.
- 为了提高氧进化反应 (OER) 和氧减少反应 (ORR) 活动和稳定性.
- 研究金属 (Co) 和三维多孔碳纳米板 (3DPC) 在催化剂性能中的作用.
主要方法:
- 一个新的 Co-CoTe@3DPC 电催化剂的合成.
- 电化学表征包括OER的超电位测量和ORR的半波电位测量.
- 操作电化学阻抗光谱 (EIS) 来评估稳定性.
- 制造和测试ZAB设备 (液态和全固态).
- 理论计算以了解催化机制.
主要成果:
- Co-CoTe@3DPC催化剂在10 mA cm-2时实现了280 mV的OER超电位,超过了商业的IrO2.
- 催化剂显示了类似Pt的氧减少反应 (ORR) 性能.
- 与Co@3DPC相比,Operando EIS显示了对表面重建的优越稳定性.
- 在ZAB中实现了最大功率密度为203mW cm-2,维持800小时.
- 所有固态ZAB的功率密度为97mW cm-2.2.
结论:
- 将金属 (Co) 引入 telluride (CoTe) 有效调节工作功能,促进电子转移和增强氧催化.
- 3D多孔碳纳米板 (3DPC) 的整合减轻了扩散限制,提高了ZAB的整体性能.
- 开发的Co-CoTe@3DPC催化剂为高效和稳定的可充电气电池提供了一个有前途的解决方案.
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