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基于双层Mn的普鲁士蓝色阴极具有高氧化还原活性,用于促进水性离子半/全电池的稳定循环

Lingqian Ye¹, Hao Fu¹, Jianeng Ji¹

¹School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003 Jiangsu, PR China.

Journal of colloid and interface science

|January 15, 2025

概括

这项研究开发了一种新的基于Mn的普鲁士蓝模拟 (PBA) 阴极材料,MnPBA@NiHCF,用于水性离子电池 (ASIB). 新材料表现出增强的结构稳定性和超长的循环寿命,为先进的电池应用铺平了道路.

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:

基于的普鲁士蓝色类似物 (PBA) 由于多电子反应,为离子电池提供高特异性容量.
离子插入过程中的结构不稳定性限制了水性离子电池 (ASIB) 中的PBA的循环寿命.

研究的目的:

为了提高ASIB的PBA阴极材料的结构稳定性和循环性能.
通过将MnPBA与NiHCF集成来开发一种新的异构性阴极材料.

主要方法:

在MnPBA.上使用现场表轴性溶剂沉积方法来生长Ni 六亚诺酸盐 (NiHCF).
异构的MnPBA@NiHCF以其在ASIB中的电化学性能而闻名.
现场拉曼和现场分析被用来研究氧化还原机制和动力学.

主要成果:

MnPBA@NiHCF阴极在1A/g的200个循环后实现了66.2mAh/g的可逆特异容量.
经过证明的超长周期稳定性,每周期仅有0.0002%的容量色,超过20,000个周期,在10 A/g.
一个带有聚胺阳极的完整电池的能量密度为59.9Wh/kg,输出功率为1200.4W/kg.

结论:

该MnPBA@NiHCF异构结构有效地克服了脱间的不稳定性,增强了结构完整性.
该材料表现出优越的Na+扩散和氧化还原行为,性能优于单个组件.
这项工作为ASIBs开发稳定和高性能PBA阴极提供了一个有前途的战略.

关键词:

水性离子电池的水性离子电池动态分析动态分析普鲁士蓝的类似物是普鲁士蓝的类似物.氧化还原机制的机制结构稳定性结构稳定性

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