无机材料学报 ›› 2014, Vol. 29 ›› Issue (11): 1127-1132.DOI: 10.15541/jim20140095 CSTR: 32189.14.10.15541/jim20140095

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牺牲棉纤维模板法制备褶皱状SnO2负极材料及其电化学性能

吁 霁, 夏 媛   

  1. (南昌大学 化学学院, 南昌330031)
  • 收稿日期:2014-03-04 修回日期:2014-04-15 出版日期:2014-11-20 网络出版日期:2014-10-24
  • 基金资助:
    江西省自然科学基金(2008GZH0049) Natural Science Foundation of Jiangxi Province (2008GZH0049)

Synthesis of Corrugated SnO2 by Cotton Fibers Template Method and Its Electrochemistry Performance

YU Ji, XIA Yuan   

  1. (Nanchang University, Department of Chemistry, Nanchang 330031, China)
  • Received:2014-03-04 Revised:2014-04-15 Published:2014-11-20 Online:2014-10-24

摘要:

以棉纤维作为模板, 制备褶皱层状SnO2。通过XRD、SEM、TEM、CV、恒流充放电、EIS等测试手段对材料结构、形貌和电化学性能进行了表征。结果表明: 产物具有由粒径16~21 nm的SnO2纳米颗粒构成的褶皱状形貌。电化学测试表明该材料在电流密度70 mA/g时循环50次后放电比容量仍高达614 mAh/g, 甚至在电流密度为3000 mA/g时放电比容量仍达到405 mAh/g, 表现出优异的循环性能和倍率性能。

关键词: SnO2, 棉纤维, 模板法, 褶皱结构, 锂离子电池

Abstract:

Corrugated SnO2 was prepared by an effective template using cotton fibers which were sacrificed during preparation. The as-prepared SnO2 samples were characterized by XRD, SEM, TEM, CV, galvanostatical method and EIS. The results show that the corrugated SnO2 is composed of nanopaticles with size of 16-21 nm. The as-obtained corrugated SnO2 electrodes can deliver a discharge capacity of 614 mAh/g at current density of 70 mA/g after 50 cycles. Even at the current density of 3 A/g the products can still deliver a high reversible discharge capacity of 405 mAh/g. As lithium storage materials, the corrugated SnO2 shows stable cyclability and good rate capability.

Key words: tin oxides, cotton fibers, template method, corrugated structure, lithium-ion batteries

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