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通过现场相位过渡进行半连贯的异构接口工程,用于增强的/离子存储

Haoran Xu¹, Qi Meng¹, Tengxin Yan¹

¹School of Materials Science and Engineering, College of Energy Storage Technology, Shandong University of Science and Technology, Qingdao, Shandong, 266590, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|January 28, 2024

概括

在碳黄色外结构中的工程铁化物纳米粒子提高了离子电池 (SIB) 和离子电池 (LIB) 的阳极性能. 这种新的异质接口设计增强了离子传输和导电性,以更好地储存能量.

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
纳米技术纳米技术

背景情况:

不同接口工程对于提高离子电池 (SIB) 和离子电池 (LIB) 阳极的离子传输和电子导电性至关重要.
格子不匹配和接口缺陷可以通过增加粒度边界电阻来阻碍性能.

研究的目的:

为SIB和LIB开发一种具有改进的离子运输动力学和电子导电性的新型阳极材料.
为了研究半连贯的异质接口和3D酸碳黄结构对电池性能的影响.

主要方法:

通过现场相位过渡合成单金属化物Fe3Se4-Fe7Se8纳米粒子.
嵌入纳米粒子在3D连接的酸化碳蛋黄外矩阵 (Fe3Se4-Fe7Se8@NC) 中.
在SIB和LIB中描述材料的结构,接口特性和电化学性能.

主要成果:

一个半连贯的Fe3Se4-Fe7Se8异构接口与匹配的格子和强大的内置电场得到了实现,导致接口阻抗较低.
蛋黄结构有效地限制了纳米粒子,增强了结构稳定性并减轻了体积膨胀.
3D碳桥改善了电子导电性,缩短了离子运输路径.
Fe3Se4-Fe7Se8@NC表现出高的特定容量:SIBs的439 mAh g-1和LIBs的1010 mAh g-1.

结论:

构造的Fe3Se4-Fe7Se8@NC材料使有效的可逆伪电容和电化学转换反应成为可能.
这项工作提出了一个新的策略,用于设计用于二次电池的阳极材料中的先进异构接口.

关键词:

阳极是一种极.在现场进行相位过渡./离子电池是一种/离子电池.多卵子贝结构多卵子贝结构.半连贯的异构接口半连贯的异构接口

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