三维多孔氮化钛用于高效限硫载体
Three-dimensional porous titanium nitride as a highly efficient sulfur host
刘瑞卿 1刘文秀 1谢坤 1刘逸然 1程慧 1王筱瑜 1田辰旭 1林秀婧 1冯晓苗1
作者信息
- 1. 南京邮电大学材料科学与工程学院,有机电子与信息显示国家重点实验室,信息材料与纳米技术研究院,南京 210023
- 折叠
摘要
通过简便、高效、可规模化的一步高温氮化法,利用高温烧结使二氧化钛(TiO2)粉末在转化成氮化钛(TiN)的同时形成连续的三维多孔网络,具有良好的导电性和高孔隙率.作为高效限硫载体,连续的三维多孔 TiN网络不仅能有效增加电子传输路径、增强电子转移、促进离子迁移,而且能够从物理限域和化学吸附两方面对多硫化锂的穿梭效应进行强有力的限制,同时有效提高了硫的负载量.制备的高导电性、高硫负载硫正极展现出较高的放电容量和优异的循环稳定性能.
Abstract
A simple,efficient,and scalable one-step high-temperature nitriding method was used to convert titani-um dioxide into titanium nitride,meanwhile,the continuous three-dimensional porous network with good electrical conductivity and high porosity was formed under high-temperature sintering.As a highly efficient sulfur host,the continuous three-dimensional porous titanium nitride network not only effectively increases the electron transport path,enhances the electron transfer,and promotes the ion migration,but also strongly restricts the shuttle effect of lithium polysulfides from both physical limiting and chemisorption,and effectively increases the sulfur loading.The as-prepared sulfur cathode with high conductivity,high catalytic activity,and high sulfur loading shows high dis-charge capacity and excellent cyclic stability.
关键词
锂硫电池/高温烧结/二氧化钛/氮化钛/三维多孔材料Key words
Li-S battery/high temperature sintering/titanium dioxide/titanium nitride/three-dimensional porous material引用本文复制引用
基金项目
国家自然科学基金(22179064)
国家自然科学基金(62174087)
出版年
2024
NETL
NSTL
维普
万方数据