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Fei Zhao¹, Li Kang¹, Jilan Long¹

¹Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, China.

|November 5, 2024

概括

一种基于MXene的新型N-doped电催化剂,其中包括Co2P/Ni2P纳米粒子,可增强可充电的空气电池. 这种催化剂在液态和固态设备中表现出卓越的性能和耐用性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
储能储能储能储能储能储能

背景情况:

氧降解反应 (ORR) 和氧演化反应 (OER) 是空气电池中的关键过程.
开发高效和耐用的电催化剂对于实际的可充电空气电池应用至关重要.
虽然MXene材料具有独特的性能,但在合成过程中可能会受到结构损伤.

研究的目的:

合成一种基于MXene的新型N-doped电催化剂,以提高空气电池的性能.
研究合成的Co2P/Ni2P@MX材料的结构和电化学特性.
评估液态和固态空气电池中电催化剂的催化活性和长期稳定性.

主要方法:

合成含有Co2P/Ni2P纳米颗粒的N-doped分层MXene,通过MXene上的CoNi-ZIF生长,然后进行化化.
对等级的Co2P/Ni2P@MX结构,电子导电性和活性位点的表征.
在液态和固态气电池中对催化剂进行电化学测试,包括用于机械洞察的DFT计算.

主要成果:

合成的Co2P/Ni2P@MX材料呈现出层次结构,更好的电子导电性和丰富的活性位点.
优化的催化剂实现了ORR的0.85V半波潜力和OER的345mV超电位.
液态空气电池表现出高特异容量 (783.7 mAh g-1) 和出色的循环稳定性 (>280 h),表现优于商业Pt/C+RuO2.
固态电池也显示出稳定的循环性能 (154小时).

结论:

N-doped Co2P/Ni2P@MX电催化剂有效地减轻了MXene的结构损伤,从而提高了电化学性能.
这种先进的催化剂为开发高性能和耐用的可充电空气电池提供了有前途的途径.
这些发现突出了层次纳米结构的潜力和下一代能源存储的协同效应.

关键词:

这就是MXene MXene.氧气的演变氧气的演变减少氧气减少氧气.过渡金属催化剂的使用空气电池是一种空气电池.

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