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在现场平衡合成高活性低旋铁阴极普鲁士蓝色用于增强离子储存

Zhiheng Su^1,2, Zihao Li^1,2, Xijia Yang^1,2

¹Key Laboratory of Advanced Structural Materials, Ministry of Education, and School of Materials Science and Engineering, Changchun University of Technology, Changchun 130012, China.

|January 10, 2025

概括

研究人员使用甲基纤维素改进了用于离子电池的铁基酸盐 (FeHCF) 阴极. 这增强了电化学性能,从而提高了储能容量和耐用性.

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:

对离子电池的需求正在增加,推动了对普鲁士蓝型阴极材料的研究.
铁六酸 (FeHCF) 作为阴极具有前景,但受到其低旋转铁位点的电化学性能的限制.

研究的目的:

为了提高FeHCF阴极的电化学性能,用于离子电池.
为了激活FeHCF中的低旋铁位点,使用碳甲基纤维素.

主要方法:

密度函数理论 (DFT) 计算以确定结合能量.
在现场合成普鲁士蓝色使用碳甲基纤维素.
在FeHCF中平衡Fe3+和水含量,并引入FeIII空缺.

主要成果:

在1C时实现了154.7mAhg-1的初始放电容量.
获得的能量密度为470.8Wh kg-1.
在100°C的4000个循环后,证明了70.2%的容量保留.

结论:

碳氧甲基纤维素有效地激活FeHCF中的低旋转Fe位点.
这种方法提供了一种更简单的方法,用于开发具有成本效益的高性能阴极材料.
这些发现有助于推进持久的离子储能解决方案.

关键词:

普鲁士的蓝色是普鲁士的蓝色高速能力能力的高率能力.在现场平衡.低旋转的Fe站点离子电池离子电池

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