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相互连接的分层多孔石墨烯基膜电极用于高功率和长周期氧电池

Arghya Dutta¹, Takashi Kameda¹, Taiga Ozawa¹

¹Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|December 2, 2025

概括

研究人员开发了一种新的石墨烯电极,用于氧电池 (LOB). 这种设计改善了氧气运输,减少了堵塞,提高了能量和功率,而不需要更多的电解质.

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:

氧电池 (LOB) 由于氧气运输缓慢和孔隙堵塞而面临能量-功率权衡问题.
增加电极多孔度可以通过增加电解质需求来恶化能量密度.

研究的目的:

研究改善LOB电极中的氧气传输策略.
开发一种电极架构,可以提高能量和功率密度,而不会影响电解质效率.

主要方法:

在多孔电极中运输氧气的理论模拟.
使用非溶剂诱导的聚烯 (PAN) 和聚乙烯氧化物 (PEO) 的相分离方法制造一个基于石墨烯的独立电极.
选择性分解PEO以创建相互连接的宏孔和减少曲.

主要成果:

理论模拟表明,通过孔隙相互连接来减少形性比氧气运输的孔隙性更为关键.
制造的石墨烯电极表现出一个高度相互连接的巨孔网络.
使用新电极的LOB电池在弱电解质条件下在1.0 mA cm-2下达到2500 mAh g-1以上.
在使用最小的电解质 (3.25 g Ah-1) 实现了4 mAh cm-2的稳定循环.
高速性能在90个循环中保持在1.5 mA cm-2.2的水平.

结论:

通过增强孔隙互连性来减少电极扭曲度是改善LOB性能的关键策略.
开发的石墨烯电极架构有效地解决了LOB中的能量-功率权衡问题.
这种方法为实际LOB应用中提高能源和功率密度提供了可行的途径.

关键词:

碳电极电极是碳的电极.高功率电池的电池是高功率的电池.瘦瘦的电解质可以提供.氧电池的氧电池是一种氧电池.孔隙性优化优化孔隙性优化可充电电池是可以充电的电池.

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