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通过使用有机N-异循环阳极启动一个高速率和稳定的水气电池

Senlin Li¹, Sanlue Hu¹, Hongfei Li^2,3

¹Faculty of Materials Science and Energy Engineering/Institute of Technology for Carbon Neutrality, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, China.

Angewandte Chemie (International ed. in English)

|January 20, 2024

概括

研究人员开发了一种稳定的有机N-异环化合物 (NHCC) 阳极和一种用于性金属空气电池的双盐电解质. 这项创新克服了金属阳极的降解,使高性能,持久的电池成为可能.

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:

性金属空气电池提供高压,低成本和安全优势.
传统的金属阳极在性电解质中经历了降解,导致诸如树生长和进化等副作用反应.
开发稳定,高性能有机阳极替代品对于推进电池技术至关重要.

研究的目的:

合成和评估一种新型有机N-异环化合物 (NHCC) 作为性电池的稳定阳极材料.
设计一种双盐,高度缩的电解质,增强电化学稳定性窗口,并补充NHCC阳极.
调查NHCC阳极的K+吸收/提取机制,并证明电池的整体性能.

主要方法:

合成有机N-异环化合物 (NHCC) 用作电池阳极.
双盐电解质 (4.0 M KOH + 10.0 M KCF3SO3) 的设计和特征.
对NHCC阳极空气电池的电化学测试,包括循环电压测量,速率能力和长期循环稳定性.

主要成果:

在性环境中,NHCC阳极表现出了显著的稳定性,具有低氧化还原潜力 (-1.04 V 与 Hg/HgO 相比).
双盐电解质将电化学稳定性窗口扩大到2.3V.
性水 NHCC 阳极空气电池实现了 1.6 V 的高电压,优异的速率性能 (101.9 mAh g-1 在 100 A g-1),以及长周期寿命 (30,000 个周期).

结论:

使用NHCC的分子工程策略为性电池提供了优质的有机阳极材料.
一种新型的双重超缩导电盐电解质使高速,长周期的性水性有机阳极空气电池成为可能.
这项研究为开发先进,稳定和高效的有机阳极材料为下一代储能解决方案铺平了道路.

关键词:

空气电池的电池是空气电池性水性电解质性水性电解质 N-异环化合物 N-异环化合物有机阳极有机阳极超缩的电解质超缩的电解质

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