The effects of carbon distribution and thickness on the lithium storage properties of carbon-coated SnO2 hollow nanofibers

被引:19
|
作者
Zhou, Huimin [1 ]
Li, Zhiyong [1 ]
Qiu, Yiping [1 ,2 ]
Xia, Xin [1 ,2 ]
机构
[1] Xinjiang Univ, Coll Text & Clothing, Xinjiang 830046, Urumqi, Peoples R China
[2] Donghua Univ, Coll Text & Clothing, Shanghai 200000, Peoples R China
基金
中国国家自然科学基金;
关键词
Carbon distribution; Carbon thickness; SnO2 hollow nanofibers; Lithium storage properties; SNO2/CARBON COMPOSITE; ION BATTERIES; PERFORMANCE; ANODE; REVERSIBILITY; NANOTUBES;
D O I
10.1016/j.jallcom.2016.02.032
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
To alleviate the enormous volume change problem of tin-based anodes for lithium ion batteries (LIBs), carbon-coated tin dioxide (SnO2) hollow nanofibers were prepared by means of single-spinneret electrospinning followed by calcination and hydrothermal treatment. By varying the concentration of glucose and the reaction time during the hydrothermal coating process, the final product with different carbon distribution and thickness could be obtained. Galvanostatic charge/discharge was carried out to evaluate them as potential anode materials for LIBs. It was shown that the main effect of carbon distribution was to control the capacity retention rate, and the carbon thickness played the important role in lithium insertion/extraction properties. The optimum composite nanofibers could be prepared with glucose concentration of 10 mg/ml and hydrothermal time of 20 h, the carbon content and the specific surface area of which were 26.15% and 29.4 m(2)/g, respectively. And this anode with both the carbon core and deposited thin carbon skin was able to deliver a high reversible capacity of 704.6 mAhg(-1) and the capacity retention could retain 68.2% after 80 cycles. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:35 / 40
页数:6
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