Hollow urchin-like Al-doped α-MnO2-x as advanced sulfur host for high- performance lithium-sulfur batteries

被引：10
作者：
Zhang, Dan [1 ]
Li, Zhihao [1 ]
Li, Yongfang [1 ]
Zeng, Peng [1 ]
Shu, Hongbo [1 ]
Chen, Manfang [1 ]
Wang, Xianyou [1 ]
机构：
[1] Xiangtan Univ, Sch Chem, Natl Base Int Sci & Technol Cooperat, Xiangtan 411105, Peoples R China
来源：
MATERIALS LETTERS | 2021年 / 285卷 / 285期
关键词：
Composite materials; Urchin-like structures; Lithium-sulfur batteries;
D O I：
10.1016/j.matlet.2020.129135
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An urchin-like hollow Al-doped alpha-MnO2-x microsphere is prepared by a facile hydrothermal method and exhibited effective regulation for the dissolution of polysulfides from the Li-S cathode. After Al doping, the conductivity of MnO2 has been greatly improved, and made the traditional MnO2 morphology changed. These Al-doped alpha-MnO2-x/S microspheres are found to exhibit high initial discharge capacity of 1017 mAh g(-1) under sulfur content up to 73 wt% at 1 C and they exhibit a favorable cycle stability of 694 mAh g(-1) at 3 C after 300 cycles. These excellent characteristics make this composite a promising cathode material for Li-S batteries. (c) 2020 Elsevier B.V. All rights reserved.
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页数：5
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