| Study of the effects of nanometer beta-Ni(OH)(2) in nickel hydroxide electrodes |
| Han, XJ; Xu, P; Xu, CQ; Zhao, L; Mo, ZB; Liu, T; Liu T(刘涛)
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| 2005
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| 发表期刊 | ELECTROCHIMICA ACTA
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| 卷号 | 50期号:14页码:2763-2769 |
| 通讯作者 | Harbin Inst Technol, Chem Lab Ctr, Dept Chem, Harbin 150001, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Facil, Beijing 100039, Peoples R China
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| 摘要 | Nanometer β-Ni(OH)(2), showed by XRD, was prepared by our supersonic coordination-precipitation method, with an average grain size of about 50 nm by TEM. Proton diffusion coefficient of nanometer Ni(OH)(2) and spherical Ni(OH)(2) were 1.93 x 10(-11), and 5.50 x 10(-13) cm(2)/s, respectively, with combination of chronocoulometry and cyclic voltammetry. Charge-discharge test of simulated batteries at 0.2° C showed that addition of 8 mass% of our prepared nanometer Ni(OH)(2) in nickel hydroxide electrodes led to increases in cathode discharge specific capacity (CDSC) by nearly 10% and the chargeability of the electrode by about 50 mAh/g, and a decrease in polarization. Cycle life test of AA-type MH-Ni batteries discovered that effect of nanometer Ni(OH)(2) in increasing CDSC was more apparent for the first 100 cycles and not much difference was found after 350 cycles. XAS demonstrated a higher oxidation state of Ni in fully charged nanometer Ni(OH)(2) composite electrode (Nano-E) and a lower one in discharged Nano-E, compared with micrometer Ni(OH)(2) spherical electrodes (Micro-E). A larger structure distortion was found in Nano-E, offering more vacancies for proton diffusion. Thus conversion between Ni2+ and Ni3+ was promoted during the charge-discharge process, which was assumed to be one explanation of increasing CDSC with the addition of nanometer Ni(OH)(2). © 2004 Elsevier Ltd. All rights reserved. |
| 文章类型 | Article
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| 关键词 | nanometer beta-Ni(OH)(2)
cathode discharge specific capacity (CDSC)
oxidation state
proton diffusion
XAS
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| 学科领域 | Electrochemistry
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| DOI | 10.1016/j.electacta.2004.11.025
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| 研究领域[WOS] | Electrochemistry
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| URL | 查看原文
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| 语种 | 英语
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| WOS类目 | Electrochemistry
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| WOS记录号 | WOS:000228961200002
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/239818
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| 专题 | 多学科研究中心
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| 作者单位 | 中国科学院高能物理研究所
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推荐引用方式
GB/T 7714 |
Han, XJ,Xu, P,Xu, CQ,et al. Study of the effects of nanometer beta-Ni(OH)(2) in nickel hydroxide electrodes[J]. ELECTROCHIMICA ACTA,2005,50(14):2763-2769.
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| APA |
Han, XJ.,Xu, P.,Xu, CQ.,Zhao, L.,Mo, ZB.,...&刘涛.(2005).Study of the effects of nanometer beta-Ni(OH)(2) in nickel hydroxide electrodes.ELECTROCHIMICA ACTA,50(14),2763-2769.
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| MLA |
Han, XJ,et al."Study of the effects of nanometer beta-Ni(OH)(2) in nickel hydroxide electrodes".ELECTROCHIMICA ACTA 50.14(2005):2763-2769.
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