| Y掺杂对氢氧化镍电极高温性能的影响 |
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| 引用本文： | 任俊霞,周震,阎杰.Y掺杂对氢氧化镍电极高温性能的影响[J].物理化学学报,2007,23(5):738-742. |
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| 作者姓名： | 任俊霞 周震 阎杰 |
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| 作者单位： | Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, P. R. China |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 合成了内掺稀土元素Y的β-Ni(OH)2和α-Ni(OH)2材料, 并通过XRD、TEM、CV 和充放电测试等方法研究了Y元素对这两种晶型活性材料的结构、形貌以及高温电化学性能方面的影响, 发现Y元素可显著提高β-Ni(OH)2和α-Ni(OH)2材料的高温性能, 且作用机理相同, 均是通过提高析氧过电位来改善镍电极的高温充电效率. 但是α-Ni(OH)2在高温下的相稳定性仍有待提高.
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| 关 键 词： | MH/Ni电池 镍电极 高温性能 充电效率 稀土元素 |
| 收稿时间： | 2006-11-14 |
| 修稿时间： | 2006-11-142007-04-21 |
Effects of Yttrium-Doping on High-temperature Electrochemical Performances of Nickel Hydroxide Electrodes |
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| REN Jun-Xia,ZHOU Zhen,YAN Jie.Effects of Yttrium-Doping on High-temperature Electrochemical Performances of Nickel Hydroxide Electrodes[J].Acta Physico-Chimica Sinica,2007,23(5):738-742. |
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| Authors: | REN Jun-Xia ZHOU Zhen YAN Jie |
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| Institution: | Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, P. R. China |
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| Abstract: | Y-doped β-Ni(OH)2 and α-Ni(OH)2 materials were synthesized, and the influences of Y on the structure, morphology and high-temperature electrochemical characteristics of the two kinds of materials were studied through XRD, TEM, CV, and charging/discharging tests. The results indicated that yttrium improved high-temperature electrochemical performances of β-Ni(OH)2 and α-Ni(OH)2 materials by the same mechanism that the charge efficiency was enhanced through the increase of oxygen evolution overpotentials. However, further efforts are still necessary to improve the phase stability of α-Ni(OH)2 at high temperatures. |
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| Keywords: | Nickel-metal hydride battery Nickel hydroxide electrode High-temperature performance Charge efficiency Rare earth element |
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