电解质
锂硫电池
阴极
硫黄
材料科学
介孔材料
电池(电)
硫化物
碳纤维
化学工程
多孔性
化学
电极
冶金
复合材料
物理
有机化学
复合数
催化作用
功率(物理)
物理化学
工程类
量子力学
作者
Tianwei Jin,Keyue Liang,Jeong-Hoon Yu,Ting Wang,Yihan Li,Tai‐De Li,Shyue Ping Ong,Jong‐Sung Yu,Yuan Yang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-05-24
卷期号:24 (22): 6625-6633
标识
DOI:10.1021/acs.nanolett.4c01210
摘要
All-solid-state lithium–sulfur batteries (ASSLSBs) are promising next-generation battery technologies with a high energy density and excellent safety. Because of the insulating nature of sulfur/Li2S, conventional cathode designs focus on developing porous hosts with high electronic conductivities such as porous carbon. However, carbon hosts boost the decomposition of sulfide electrolytes and suffer from sulfur detachment due to their weak bonding with sulfur/Li2S, resulting in capacity decays. Herein, we propose a counterintuitive design concept of host materials in which nonconductive polar mesoporous hosts can enhance the cycling life of ASSLSBs through mitigating the decomposition of adjacent electrolytes and bonding sulfur/Li2S steadily to avoid detachment. By using a mesoporous SiO2 host filled with 70 wt % sulfur as the cathode, we demonstrate steady cycling in ASSLSBs with a capacity reversibility of 95.1% in the initial cycle and a discharge capacity of 1446 mAh/g after 500 cycles at C/5 based on the mass of sulfur.
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