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高容量和快速动力学通过金属剂在离子电池的普鲁士蓝色模拟阴极中实现

Trakarn Yimtrakarn¹, Yi-An Lo¹, Jakkraphat Kongcharoenkitkul¹

¹Department of Chemical Engineering, Hierarchical Green-Energy Materials (Hi-GEM) Research Center, National Cheng Kung University, Tainan City, 70101, Taiwan.

Chemistry, an Asian journal

|May 4, 2024

概括

在普鲁士蓝色类似物 (PBA) 中用进行金属注显著提高了离子电池的性能. 这一策略提高了循环稳定性和高速率能力,为先进的电池材料铺平了道路.

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:

普鲁士蓝色类似物 (PBA) 对于离子电池是有前途的,因为它们的低成本和电化学调性.
挑战包括由于格子应变造成的循环稳定性差以及在离子插入/提取过程中的体积变化.

研究的目的:

研究金属兴奋剂对离子电池PBA电化学性能和结构稳定性的影响.
为了提高PBA电极材料的循环稳定性和速率能力.

主要方法:

通过金属兴奋剂策略合成兴奋铁六酸 (FeNiHCF).
电化学表征包括不同速率的静电循环.
在现场同步X射线衍射分析循环过程中的结构变化.

主要成果:

FeNiHCF在10 mA g-1.1时提供了148 mAh g-1的高容量.
在25.6 A g-1下具有~55 mAh g-1的特殊速率能力,并且在1000个周期内每周期的低衰变率为0.02%.
在现场XRD显示最小的单元细胞体积变化 (~1%),表明增强的结构稳定性.
兴奋剂增加了电子导电性和氧化还原活性,特别是在低旋转的Fe中心.

结论:

兴奋剂有效地稳定了PBA结构,改善了长期循环和高速性能.
性能提升归因于由Ni替代增加的电子导电性和氧化还原活性.
这项工作为设计可持续的离子电池的高性能电极材料提供了见解.

关键词:

普鲁士蓝色的类似物是普鲁士蓝色的模拟物.阴极阴极是指一个阴极.六亚诺酸盐是什么金属兴奋剂的使用方法离子电池离子电池

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