Porous nitrogen-doped carbon/MnO coaxial nanotubes as an efficient sulfur host for lithium sulfur batteries

被引:39
|
作者
Lin, Chao [1 ]
Qu, Longbing [2 ]
Li, Jiantao [1 ]
Cai, Zhengyang [1 ]
Liu, Haoyun [1 ]
He, Pan [1 ]
Xu, Xu [1 ]
Mai, Liqiang [1 ]
机构
[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
[2] Univ Melbourne, Dept Mech Engn, Melbourne, Vic 3010, Australia
基金
中国国家自然科学基金;
关键词
nitrogen doping; porous; MnO; carbon nanotubes; sulfur batteries; HIGH-PERFORMANCE; POLYSULFIDE MEDIATOR; GRAPHENE; COMPOSITE; CATHODE; NANOSHEETS; NANOCAGES;
D O I
10.1007/s12274-018-2203-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
As a promising candidate for next generation energy storage devices, lithium sulfur (Li-S) batteries still confront rapid capacity degradation and low rate capability. Herein, we report a well-architected porous nitrogen-doped carbon/MnO coaxial nanotubes (MnO@PNC) as an efficient sulfur host material. The host shows excellent electron conductivity, sufficient ion transport channels and strong adsorption capability for the polysulfides, resulting from the abundant nitrogen-doped sites and pores as well as MnO in the carbon shell of MnO@PNC. The MnO@PNC-S composite electrode with a sulfur content of 75 wt.% deliveries a specific capacity of 802 mAhg(-1) at a high rate of 5.0 C and outstanding cycling stability with a capacity retention of 82% after 520 cycles at 1.0 C.
引用
收藏
页码:205 / 210
页数:6
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