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在普鲁士蓝色阴极中操纵相位稳定性和动力学,通过积工程和离子电池的阳离子结合

Honglin Huang¹, Shuangyan Qiao¹, Benhui Lv¹

¹State Key Laboratory of Flexible Electronics (LoFE), Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an 710072, China.

|October 5, 2025

概括

在普鲁士蓝色类似物 (PBA) 中的热工程通过稳定结构和改善离子扩散来增强离子电池 (PIB) 阴极. 这种新型材料实现了高能量密度和长周期寿命,用于先进的能量存储.

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:

普鲁士蓝色类似物 (PBA) 是离子电池 (PIB) 的有希望的阴极材料.
阶段过渡和缺陷限制了传统PBA的电化学性能.
发展稳定和高绩效的PBA对于推进GDP至关重要.

研究的目的:

通过使用工程和d10 cation合并来克服传统PBA的局限性.
为了合成和描述一种新型的中PBA,K1.23Fe0.42Mn0.45Sn0.13[Fe(CN) 60.94·1.35H2O (KFMSHCF).
评估KFMSHCF作为PIBs的阴极材料的电化学性能.

主要方法:

积工程和d10 (Sn2+) 结合被用来合成KFMSHCF.
电化学性能使用诸如静电循环和速率能力测试等技术进行评估.
通过表征和理论分析,研究了结构稳定性和离子扩散动力学.

主要成果:

由引发的阴离子障碍和Sn2+结合显著抑制了阴离子空缺,并稳定了局部协调.
KFMSHCF表现出高的配置,导致频段间隙减少和低的K离子扩散屏障.
该材料展示了一种零应变固体溶液机制,Fe,Mn和Sn作为氧化还原中心.
KFMSHCF提供了高初始能量密度364.2Wh·kg-1,在100个循环后保持了82.1%的容量,寿命超过300个循环.
制造的K离子电池在2500个周期内实现了每周期的衰变率为0.017%.

结论:

学工程和d10 cation合并是开发高性能PBA的有效策略.
KFMSHCF显示出出色的电化学动力学,高能量密度和显著的循环稳定性.
这项工作为设计下一代离子电池的先进阴极材料提供了途径.

关键词:

阴极材料的材料是正极材料.Entropy Entropy 阶段稳定性阶段稳定性离子电池是一种离子电池.普鲁士的蓝色是普鲁士的蓝色

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