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通过为可充电Mg离子电池的牺牲性硫化封装减轻氧化中界面容量的色

Ayan Mukherjee^1,2,3, Sankalpita Chakrabarty^1,2, Sarah Taragin^1,2

¹Department of Chemistry, Bar Ilan University, Ramat Gan, 5290002, Israel.

Small (Weinheim an der Bergstrasse, Germany)

|January 4, 2024

概括

新的VS2涂层保护可充电Mg离子电池 (RMB) 中的V2O5阴极,提高稳定性和性能. 这一突破解决了实际人民币发展的关键挑战,为更安全,更高容量的储能铺平了道路.

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:

可充电Mg离子电池 (RMB) 与离子技术相比具有优势,但面临着阴极稳定性的挑战.
与Mg金属阳极兼容的有限的正极材料选择阻碍了人民币的发展.
在Mg金属阳极的相关电解质中,V2O5显示出潜力,但缺乏稳定性.

研究的目的:

为人民币开发一种稳定的阴极材料.
为了提高V2O5基阴极的性能和周期寿命.
展示Mg离子电池电解质中V2O5的保护涂层策略.

主要方法:

在现场封装V2O5纳米粒子与VS2薄层通过表面减少.
在Mg离子电池电解质中对V2O5和V2O5@VS2进行电化学测试 (MgCl2 + MgTFSI在DME中).
评价容量,速度性能,库伦比克效率和自行车稳定性.

主要成果:

成功合成了V2O5@VS2的核心外结构 (V2O5 ≈200 nm,VS2 ≈12 nm).
该VS2层有效地保护了人民币电解质中的V2O5.
V2O5@VS2表现出优越的速率能力,100%的库伦比效率,并在100个循环后保留了138 mAh g-1.

结论:

VS2涂层对于保护V2O5阴极至关重要.
该V2O5@VS2材料表现出卓越的稳定性和电化学性能.
这种方法促进了Mg+2离子的间隔/脱,使实际的人民币成为可能.

关键词:

离子电池是一种Mg离子电池.电化学电化学电化学表面涂层是一种表面涂层.

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