石墨烯
材料科学
化学工程
膜
相位反转
硫黄
电流密度
储能
锂(药物)
催化作用
多孔性
化学
纳米技术
复合材料
热力学
有机化学
冶金
物理
工程类
内分泌学
功率(物理)
医学
量子力学
生物化学
作者
Zhentao Nie,Kaiqin Xu,Yuquan Lu,Hongjian Zhang,Haodong Liu,Feng Xu,Yibo Yan,Jingsan Xu,Jixin Zhu
标识
DOI:10.1002/adsu.202200086
摘要
Abstract Lithium–sulfur (Li–S) batteries are regarded as one of the most prominent future‐oriented energy battery systems due to their high theoretical energy density (2600 Wh kg −1 ). However, the shuttle effect of polysulfides and short cycle life have critically hindered their commercialization. Herein, a stepped porous heterostructured membrane of carbon‐multilayer graphene (MG)@Fe 3 C/Fe 3 N is developed by a facile phase inversion method and applied as a current collector to replace Al foil. The special heterostructured membrane with MG can further boost the charge/Li + ion transfer speed while accommodating the volume expansion in the charge/discharge cycle. The shuttle effect of polysulfides is inhibited by the heterostructure phase of the Fe 3 C/Fe 3 N catalytic effect and chemisorption. This synergistic effect is confirmed by density function theory (DFT) calculations. As a result, the C‐MG@Fe 3 C/Fe 3 N membranes delivers distinguished discharge capacity and cycling stability of 508.92 mAh g −1 (693.47 mAh g −1 ) at a large discharge of current of 2 C (at 0.5 C) after 400 cycles (300 cycles) with only 0.36% capacity attenuation per cycle.
科研通智能强力驱动
Strongly Powered by AbleSci AI