电化学沉积制备V2O5薄膜电极的表面结构及储钠性能

doi:10.11949/j.issn.0438-1157.20160315

化工学报 ›› 2016, Vol. 67 ›› Issue (11): 4771-4778.DOI: 10.11949/j.issn.0438-1157.20160315

电化学沉积制备V₂O₅薄膜电极的表面结构及储钠性能

李延伟^1,2, 李世玉¹, 谢志平¹, 姚金环¹, 姜吉琼¹, 张灵志²

1 广西电磁化学功能物质重点实验室, 桂林理工大学化学与生物工程学院, 广西桂林 541004;
2 中国科学院可再生能源重点实验室, 广东广州 510640

收稿日期:2016-03-18 修回日期:2016-08-21 出版日期:2016-11-05 发布日期:2016-11-05
通讯作者: 姚金环,yaojinhuan@126.com
基金资助:
国家自然科学基金项目（21263003，51664012，51464009）；广西自然科学基金项目（2015GXNSFGA139006，2014GXNSFBA118238）；中国科学院可再生能源重点实验室资助项目（y507k61001）。

Surface morphology and sodium storage performance of V₂O₅ thin film electrode prepared by CTAB assisted electrodeposition

LI Yanwei^1,2, LI Shiyu¹, XIE Zhiping¹, YAO Jinhuan¹, JIANG Jiqiong¹, ZHANG Lingzhi²

1 Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, Guangxi, China;
2 Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China

Received:2016-03-18 Revised:2016-08-21 Online:2016-11-05 Published:2016-11-05
Supported by:
supported by the National Natural Science Foundation of China (21263003, 51664012, 51464009), the Natural Science Foundation of Guangxi (2015GXNSFGA139006, 2014GXNSFBA118238) and Key Laboratory of Renewable Energy, Chinese Academy of Sciences (y507k61001).

摘要/Abstract

摘要：

以含有CTAB的V₂O₅溶胶为电解液，采用电沉积法在不锈钢基体上沉积V₂O₅薄膜前体，经300℃烧结处理后制备了无黏结剂和导电剂的V₂O₅纳米薄膜电极。XRD测试表明该方法制备的V₂O₅薄膜是含水相的V₂O₅·nH₂O，与未添加CTAB制备的薄膜相比，其层间距明显变大。FESEM和AFM测试发现CTAB辅助电沉积制备的V₂O₅薄膜具有粗糙多孔的表面形貌；XPS测试表明CTAB辅助电沉积制备的V₂O₅薄膜中含有更多的低价钒离子（V⁴⁺）。电化学测试发现该方法制备的V₂O₅薄膜具有优异的嵌/脱Na⁺循环稳定性；与未添加CTAB制备的薄膜相比，CTAB辅助电沉积制备的V₂O₅薄膜具有更好的电化学反应可逆性、更强Na⁺扩散性能和更高的储钠比容量，是一种非常有应用前景的钠离子电池正极材料。

关键词: 钠离子电池, 正极材料, 制备, 电化学, 纳米材料

Abstract:

New V₂O₅ nanofilm electrodes without binder and conductive agents were fabricated by sintering the V₂O₅ film precursor at 300℃ on stainless steel substrates, which were coated from CTAB-containing V₂O₅ sol gel electrolyte by electrodeposition. X-Ray diffraction (XRD) indicated that V₂O₅ in the new V₂O₅ film was hydrated V₂O₅·nH₂O and the film had lager interlamellar spacing than V₂O₅ film prepared without CTAB. Field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM) results showed that the new V₂O₅ film possessed a rough porous surface morphology. X-Ray photoelectron spectroscopy (XPS) results suggested that the new V₂O₅ film electrode contained more V⁴⁺ than the V₂O₅ film electrode prepared without CTAB. Electrochemical study demonstrated that the new V₂O₅ film electrode had excellent Na⁺ insertion/extraction stability. Compared to the V₂O₅ film electrode prepared without CTAB, the new V₂O₅ film electrode exhibited better electrochemical reaction reversibility, enhanced Na⁺ diffusion performance, and higher sodium storage specific capacity, which could be a very promising cathode material for sodium ion batteries.

Key words: sodium ion batteries, cathode materials, preparation, electrochemistry, nanomaterials

中图分类号:

TB43

李延伟, 李世玉, 谢志平, 姚金环, 姜吉琼, 张灵志. 电化学沉积制备V₂O₅薄膜电极的表面结构及储钠性能[J]. 化工学报, 2016, 67(11): 4771-4778.

LI Yanwei, LI Shiyu, XIE Zhiping, YAO Jinhuan, JIANG Jiqiong, ZHANG Lingzhi. Surface morphology and sodium storage performance of V₂O₅ thin film electrode prepared by CTAB assisted electrodeposition[J]. CIESC Journal, 2016, 67(11): 4771-4778.

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电化学沉积制备V₂O₅薄膜电极的表面结构及储钠性能

Surface morphology and sodium storage performance of V₂O₅ thin film electrode prepared by CTAB assisted electrodeposition

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