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精确的固体相合成CoFe@FeO_x纳米颗粒,以有效调节/-硫电池中的多硫化物

Yanping Chen¹, Yu Yao², Wantong Zhao³

¹State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, 116023, China.

Nature communications

|November 19, 2023

概括

一种新的固相合成方法精确地制造出均分布的铁/氧化铁 (CoFe@FeOx) 核心外纳米粒子. 这些纳米粒子有效调节聚硫化物,显示了先进电池应用的前景.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
电化学电化学电化学

背景情况:

在支架上均分布的复杂金属纳米粒子对各种应用具有独特的特性.
传统的湿化学方法难以同时实现控制的纳米粒子结构和均分散.
固相合成为在支器上制造复杂金属纳米粒子提供了一个有前途的策略.

研究的目的:

为均分布的CoFe@FeOx核心@外纳米粒子开发精确的固体相合成策略.
为了证明这种方法用于合成其他MFe@FeOx (M = Co,Ni,Mn) 纳米粒子的普遍性.
研究CoFe@FeOx作为分离涂层的应用,用于调节电池中的聚硫化物.

主要方法:

固体相合成涉及从CoFe合金中偏好溶解Fe原子.
在合成气氛下,表面Fe原子碳化成FexC外.
在空气中使FexC外被动,形成FeOx外,产生CoFe@FeOx核心@外结构.

主要成果:

精确合成均分布的CoFe@FeOx核心@外纳米粒子.
使用开发的策略,证明了MFe@FeOx (M = Co,Ni,Mn) 的合成.
当CoFe@FeOx作为Li-S和Na-S电池的分离涂层时,它在调节聚硫化物方面表现出双功能作用.

结论:

开发的固相合成策略使复杂的金属纳米粒子具有均分散的精确制造成为可能.
CoFe@FeOx核心@外纳米颗粒有效调节聚硫化物,提高电池性能.
这种方法有可能开发固相合成系统,用于先进的纳米粒子制造.

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