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双稳定三维蜂式MXene/普鲁士蓝模拟复合材料,用于高性能水性离子电池

Tianjiao Liu¹, Ling Zang², Muslum Demir³

¹Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, 200237 Shanghai, China.

ACS applied materials & interfaces

|October 23, 2025

概括

一个新的3D蜂MXene框架增强了水性离子电池的合金酸二烯酸盐阴极,改善了循环寿命和容量. 这种稳定的结构可以提高半细胞和全细胞的性能.

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:

水性离子电池 (ASIB) 面临着电极材料不稳定的挑战,限制了循环寿命和容量.
阴极材料的结构降解是ASIB性能差的主要原因.

研究的目的:

设计一个稳定的3D蜂状MXene (HMX) 框架作为合金合硫酸 (NaCoHCF) 的宿主.
通过提高离子储存效率和循环稳定性来提高ASIB的性能.

主要方法:

制造一个3D HMX框架来托管NaCoHCF.
在半电池和全电池中对NaCoHCF/HMX复合物的电化学测试.
密度函数理论 (DFT) 计算以验证接口合和合成机制.

主要成果:

NaCoHCF/HMX阴极在0.1 A g-1下实现了123.7 mAh g-1的高放电容量.
证明了特殊的循环稳定性,在半细胞中以2.0 A g-1的速度在10,000个循环后保持了82.4%的容量.
一个全细胞 (NaCoHCF/HMXNaTi₂(PO₄) ₃@C) 在2500个循环后,在1.0 A g^{-1^{时显示出94.4%的容量保留.}}

结论:

该HMX框架有效地抑制了NaCoHCF中的结构扭曲和纳米粒子凝聚.
复合材料提供了一个高效的电子传输网络和丰富的离子可访问站点.
这项工作提出了一个可行的策略,用于开发高级普鲁士蓝模拟 (PBA) 基材料,用于高性能ASIB.

关键词:

普鲁士蓝的类似物是普鲁士蓝.水性离子电池水性离子电池复合材料是一种复合材料.电化学性能电化学性能电化学性能这是一个三维的蜂形象的MXeneene.

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