Rice husks-derived hierarchical porous SiO2@C as efficient polysulfide mediator for Li-S batteries

被引：8
|
作者：
Su, Wei [1 ]
Luo, Chao [1 ]
Gao, Biao [1 ]
Zhang, Xuming [1 ]
Fu, Jijiang [1 ]
Zheng, Yang [1 ]
Chu, Paul K. [2 ,3 ]
机构：
[1] Wuhan Univ Sci & Technol, Inst Adv Mat & Nanotechnol, State Key Lab Refractories & Met, Wuhan 430081, Peoples R China
[2] City Univ Hong Kong, Dept Phys, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
[3] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Tat Chee Ave, Hong Kong, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 296卷 / 296期
基金：
中国国家自然科学基金;
关键词：
Energy storage and conversion; Carbon materials; Physical confinement; Chemical affinity; Li-S batteries; SULFUR HOST; COMPOSITES;
D O I：
10.1016/j.matlet.2021.129926
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The serious shuttle effect and sluggish redox kinetics hinder the practical implementation of Li-S batteries. Here, we proposed a general method for large-scale synthesis of hierarchical porous SiO2@C host derived from waste rice husks. The prepared SiO2@C-2.5S cathode exhibits superior electrochemical properties, which can be attributed to the physical adsorption of porous carbon shell and chemical anchoring effect of SiO2 nanoparticles. Moreover, the hierarchical porous carbon matrix provides a highly conductive channel for rapid electron and ion transport, and offers enough space for the volume expansion of elemental S during the reaction. (C) 2021 Elsevier B.V. All rights reserved.
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页数：4
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