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为高性能水性离子电池设计的以中等度设计的δ-MnO₂阴极

Yizhen Wang¹, Weiwu Yuan¹, Xiang Ding²

¹Fujian Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China.

Journal of colloid and interface science

|December 10, 2025

概括

这项研究引入了一种新的中 δ-MnO2 阴极,用于水性离子电池 (AZIB). Cr/V/Ti 联合剂增强导电性和稳定性,实现高容量和长周期寿命.

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:

多层 δ-MnO2 阴极为水性离子电池 (AZIB) 提供高电压和容量.
然而,它们的导电性和结构不稳定性较差,这限制了它们的实际应用.
开发稳定和导电性阴极材料对于推进AZIB技术至关重要.

研究的目的:

设计和合成一种中 δ-MnO2 阴极材料,具有增强的电子/离子导电性和结构稳定性.
研究Cr/V/Ti多主元素共对δ-MnO2.2的电化学性能的影响.
为了阐明Zn2+在稳定阴极中的插入/提取机制.

主要方法:

使用Cr/V/Ti多主元素共的中设计策略.
在稳定 δ-MnO2 阴极材料的合成.
电化学表征包括循环电压测量,静电电荷放电和速率能力测试.
现场表征 (例如,现场XRD,现场DRT) 和密度函数理论 (DFT) 计算.

主要成果:

中等性兴奋剂显著改善了散装电子空间结构,增强了反应动力学.
优化的阴极表现出优异的结构稳定性,并抑制了Mn溶解.
该材料在1°C时达到298 mA hg−1的高工作能力,卓越的周期稳定性 (100次循环后91.5%),以及具有竞争力的速率能力 (在3°C时达到199 mA hg−1).

结论:

中等设计是一种有效的策略,可以提高AZIB中的δ-MnO2阴极的性能.
经过Cr/V/Ti联合剂的δ-MnO2显示出用于高性能和实际的AZIB应用的巨大潜力.
这项工作为先进电池材料的结构-活性关系和离子插入机制提供了基本的见解.

关键词:

水性离子电池的水性离子电池高性能的高性能.中等度的兴奋剂.在 Δ-MnO(2) 阴极.

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