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Updated: Jan 17, 2026

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可变形,无裂纹和低成本的NaFeCl₄阴极具有高度的结构可逆性,用于稳定的全固态电池

Zi-Wei Wang^1,2, Jin-Da Luo¹, Zhong-Yuan Huang³

¹Department of Applied Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.

Journal of the American Chemical Society

|September 18, 2025

概括

一种新型,高度可变形的阴极,NaFeCl4,为全固态电池提供了低成本的解决方案. 这种材料克服了高压阴极的机械不稳定性问题, 实现了稳定和高效的能量存储.

科学领域:

材料科学
电化学
固态电池

背景情况:

全固态电池 (ASSSB) 是安全,高能储存的前景.
刚性氧化物正极 (例如,NaNi1 / 3Fe1 / 3Mn1 / 3O2) 面临与固体电解质的接触损失,导致容量降低.
开发稳定的高压阴极对于ASSSB的发展至关重要.

研究的目的:

为ASSSB引入一种高度可变的化物阴极材料.
解决现有正极材料中的机械不稳定性和容量衰减问题.
评估新型化物阴极的电化学性能和成本效益.

主要方法:

合成和描述NaFeCl4极.
机械性能评估 (的模量).
电化学循环测试以评估容量保留和稳定性
与传统的阴极材料相比进行成本分析.

主要成果:

NaFeCl4阴极具有较低的扬模量 (1.33 GPa) 和优异的结构可逆性.
在500个周期内保持84.4%的容量,保持无裂纹形态.
在~3.45V的工作电压下工作,Na+/Na的能量密度为~405Wh kg-1.
与NaNi1 / 3Fe1 / 3Mn1 / 3O2和Na3V2 ((PO4) 3) 阴极相比,成本显著降低.

结论:

可变形的NaFeCl4极有效地解决了固态系统中的机械挑战.
这种材料为高压ASSSB提供了低成本,稳定和高性能的选择.
为下一代电池设计机械坚固的阴极提供了新的策略.

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