CIESC Journal ›› 2015, Vol. 66 ›› Issue (12): 5088-5095.DOI: 10.11949/j.issn.0438-1157.20150624

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Preparation and lithium ion storage performance of nano-sized β-Ni(OH)2

LI Yanwei1,2, PAN Guanlin1, YAO Jinhuan1, LI Shiyu1, ZHANG Lingzhi2   

  1. 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:2015-05-18 Revised:2015-08-27 Online:2015-12-05 Published:2015-12-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21263003, 51204061, 51464009), the Natural Science Foundation of Guangxi Province (2012GXNSFAA053026, 2014GXNSFBA118238) and the Key Laboratory of Renewable Energy, Chinese Academy of Sciences (y507k61001).

纳米b-Ni(OH)2的制备及其储锂性能

李延伟1,2, 潘观林1, 姚金环1, 李世玉1, 张灵志2   

  1. 1 桂林理工大学化学与生物工程学院, 广西电磁化学功能物质重点实验室, 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
  • 通讯作者: 姚金环
  • 基金资助:

    国家自然科学基金项目(21263003,51204061,51464009);广西省自然科学基金项目(2012GXNSFAA053026,2014GXNSFBA118238);中国科学院可再生能源重点实验室资助项目(y507k61001)。

Abstract:

Ni(OH)2 sample is prepared by chemical precipitation method with Ni(NO3)2·6H2O and NaOH as raw materials. X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) analysis reveal that the sample is β-Ni(OH)2 with sheet-like hierarchical nanostructure. Cyclic voltammograms (CV) and charge-discharge tests are performed to study the lithium ion storage performance of the β-Ni(OH)2 sample. The results show that the prepared β-Ni(OH)2 sample has a very high lithium ion storage activity. For example, at a charge-discharge current density of 50 mA·g-1, the discharge capacity of the third cycle for the prepared β-Ni(OH)2 is higher than 1550 mA·h·g-1. The carbon content in electrode has a great influence on both the cyclic stability and rate performance of the β-Ni(OH)2 sample. The mechanism of carbon content on lithium storage performance of the β-Ni(OH)2 sample is analyzed by electrochemical impedance spectroscopy (EIS) tests.

Key words: nickel hydroxide, lithium ion batteries, nanomaterials, nanostructure, electrochemistry

摘要:

以Ni(NO3)2·6H2O和NaOH为原料采用化学沉淀法制备了Ni(OH)2电极材料。采用X射线衍射(XRD)和场发射扫描电子显微镜(FESEM)表征了样品的微观结构,结果表明该样品是具有片状纳米次级结构的β-Ni(OH)2。采用循环伏安(CV)和电化学充放电测试研究了该β-Ni(OH)2样品的储锂性能,结果发现该样品作为锂离子电池负极材料具有非常高的储锂活性,在50 mA·g-1电流密度下其第3次循环放电比容量高于1550 mA·h·g-1;样品电极中的碳含量对其循环性能和倍率性都有显著影响,通过交流阻抗(EIS)测试分析了样品电极中碳含量的作用机理。

关键词: 氢氧化镍, 锂离子电池, 纳米材料, 纳米结构, 电化学

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