| 纳米b-Ni(OH)2的制备及其储锂性能 |
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| 引用本文： | 李延伟,潘观林,姚金环,李世玉,张灵志.纳米b-Ni(OH)2的制备及其储锂性能[J].化工学报,2015,66(12):5088-5095. |
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| 作者姓名： | 李延伟 潘观林 姚金环 李世玉 张灵志 |
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| 作者单位： | 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 |
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| 基金项目： | 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)。 |
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| 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。
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| 关 键 词： | 氢氧化镍 锂离子电池 纳米材料 纳米结构 电化学 |
| 收稿时间： | 2015-05-18 |
| 修稿时间： | 2015-08-27 |
Preparation and lithium ion storage performance of nano-sized β-Ni(OH)2 |
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| LI Yanwei,PAN Guanlin,YAO Jinhuan,LI Shiyu,ZHANG Lingzhi.Preparation and lithium ion storage performance of nano-sized β-Ni(OH)2[J].Journal of Chemical Industry and Engineering(China),2015,66(12):5088-5095. |
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| Authors: | LI Yanwei PAN Guanlin YAO Jinhuan LI Shiyu ZHANG Lingzhi |
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| Affiliation: | 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 |
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| 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. |
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| Keywords: | nickel hydroxide lithium ion batteries nanomaterials nanostructure electrochemistry |
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