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通过化物辅助电化学腐蚀实现高性能金属阳极的超薄固体电解质间相

Xue Wang¹, Qiao Zhang², Zengwu Wei¹

¹School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.

Small (Weinheim an der Bergstrasse, Germany)

|April 26, 2025

概括

使用LiCl和LiNO3的新电解质策略同时稳定金属电池. 这种方法控制了固体电解质间相 (SEI) 厚度,改善了各种电池类型的循环稳定性和性能.

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:

(Li) 金属上的固体电解质介相 (SEI) 极大地影响了树的生长和电池的性能.
控制SEI厚度和组成对于稳定的金属阳极至关重要.

研究的目的:

根据电化学腐蚀原理,为金属电池开发一种新的电解质选择策略.
通过优化SEI形成来提高金属阳极的稳定性和循环性能.

主要方法:

在电解质中同时使用LiCl和LiNO3,以利用高的供体数,低的溶解能量和高的Li+转移数.
用LiFePO4 (LFP) 和NMC811阴极对称Li电池和Li金属电池的电化学表征.
在不同的电池化学中验证电解质设计,包括无阳极和袋式电池.

主要成果:

在Li金属阳极上形成一个稳定,薄的SEI (≈100nm) 富含LiF和Li2O.
在5 mA cm-2.2下,Li对称细胞的稳定循环运行2000小时.
带有LFP阴极的金属电池在680 mA g-1下演示了1600个循环,而在70个循环以170 mA g-1.1后, (5微米) 白LFP电池保持了95%的容量.
在各种电池化学和高负载阴极配置中成功验证.

结论:

拟议的电解质设计策略有效控制SEI的形成,提高金属阳极的稳定性.
这种方法显著提高了金属电池的循环性能和寿命.
电解质的普遍性和可行性使其成为下一代储能设备的有希望的战略.

关键词:

阳极极化的极化已经死亡的.树的生长树的生长金属电池是金属电池的一种.固体电解质相间阶段

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