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无树的双相Li-Ba合金阳极由内置混合导电微通道的有序阵列启用

Weishang Jia^1,2, Junxian Chen², Zihao Wang^1,3

¹School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|November 22, 2023

概括

这项研究引入了一种双相-合金阳极,可以防止树的生长. 这种新型材料通过创建稳定,多孔的结构来提高金属电池的性能.

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
纳米技术纳米技术

背景情况:

金属阳极面临着像树突形成和体积变化这样的挑战,限制了电池的安全性和寿命.
开发稳定高效的金属阳极对于下一代能源存储至关重要.

研究的目的:

为了研究性复合体多孔阵列在抑制树突的有效性.
开发一种具有增强电化学性能的双相-合金阳极.

主要方法:

通过单步热聚变合成具有自组装微通道的双相Li-Ba合金.
合金结构和电化学性能的表征.
密度函数理论 (DFT) 计算以了解沉积机制.

主要成果:

Li-Ba合金在脱后形成了一个有序的多孔BaLi4金属间支架,作为一个3D电流收集器.
BaLi4支架具有混合导电性,促进Li+离子扩散和均的Li沉积.
DFT计算证实了BaLi4的性质,增强了Li金属沉积.
复合阳极显著抑制了树的生长,并提高了空间利用率.

结论:

带有多孔BaLi4支架的双相Li-Ba合金有效抑制了树突.
这种新的阳极架构显著提高了金属电池的循环稳定性和性能.

关键词:

这是一种双相Li-Ba合金.电池是一种电池.二二二二二二二二金属阳极是一种金属阳极.自组装的微通道阵列.

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