深冷处理温度对锡锑/碳纳米纤维负极材料锂电性能的影响

doi:10.13475/j.fzxb.20180503906

纺织学报 ›› 2019, Vol. 40 ›› Issue (04): 38-43.doi: 10.13475/j.fzxb.20180503906

深冷处理温度对锡锑/碳纳米纤维负极材料锂电性能的影响

刘慧洁, 夏鑫()

新疆大学纺织与服装学院, 新疆乌鲁木齐 830046

收稿日期:2018-05-16 修回日期:2019-01-05 出版日期:2019-04-15 发布日期:2019-04-16
通讯作者: 夏鑫
作者简介:刘慧洁(1996—),女。主要研究方向为功能性纺织材料的开发与应用。
基金资助:
国家自然科学基金项目(51763022);新疆特色纺织材料开发及应用研究创新团队项目(201705151);大学生创新项目(201710755007);新疆大学四期教改项目(XJU2015JGY36)

Influence of deep cryogenic treatment temperature on lithium electrical properties of SnSb/C nanofiber anode material

LIU Huijie, XIA Xin()

College of Textiles and Clothing, Xinjiang Unversity, Urumqi, Xinjiang 830046, China

Received:2018-05-16 Revised:2019-01-05 Online:2019-04-15 Published:2019-04-16
Contact: XIA Xin

摘要/Abstract

摘要：

为提高锡锑/碳(SnSb/C)纳米纤维作为负极材料的锂电池的循环使用性能,利用深冷处理对SnSb/C纳米纤维进行形貌再造,比较不同深冷温度处理前后纳米纤维的形貌变化,并测试其含碳量和比表面积,通过分析电池的恒流充放电曲线研究深冷处理温度的变化对其电化学性能的影响。结果表明:当深冷处理温度为 -100 ℃时,SnSb/C纳米纤维表面粗糙度增加并出现沟壑;深冷处理加快了聚丙烯腈的预氧化反应速度,使其分解温度提前,含碳量高达75.4%,比表面积为214.0 m²/g;锂电循环过程中,因深冷处理对其形貌结构的影响,电池容量呈持续上升趋势,循环120圈后容量保持率为123.5%。

关键词: SnSb/C纳米纤维负极材料, 锂电池, 深冷处理, 循环性能, 电化学性能

Abstract:

In order to improve the electrochemical performance of SnSb/C nanofibers anodes for lithium-ion battery, the deep cryogenic treatment was used to modify the morphology of SnSb/C nanofibers, the influence of cryogenic temperature on the electrochemical performance was studied by comparing the changes of morphology, the specific surface area, the carbon contents and the charge-discharge curve of SnSb/C nanofibers. The results show that when the cryogenic temperature is -100 ℃, SnSb/C nanofiber has a rough surface with gullies. The cryogenic treatment accelerates the preoxidation reaction speed of polyacrylonitrile, so that the decomposition temperature decrease, the carbon content is up to 75.4% and the specific surface increases to 214.0 m²/g. Besides, owing to the influence of deep cryogenic treatment on the morphology of SnSb/C nanofibers, the battery capacity sustainably increases during the cycling of the lithium ion battery. After 120 cycles, the capacity retention ratio is still 123.5%.

Key words: SnSb/C nanofiber anode material, lithium battery, deep cryogenic treatment, cycle performance, electrochemical property

中图分类号:

O646.21

刘慧洁, 夏鑫. 深冷处理温度对锡锑/碳纳米纤维负极材料锂电性能的影响[J]. 纺织学报, 2019, 40(04): 38-43.

LIU Huijie, XIA Xin. Influence of deep cryogenic treatment temperature on lithium electrical properties of SnSb/C nanofiber anode material[J]. Journal of Textile Research, 2019, 40(04): 38-43.

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深冷处理温度对锡锑/碳纳米纤维负极材料锂电性能的影响

Influence of deep cryogenic treatment temperature on lithium electrical properties of SnSb/C nanofiber anode material

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