| 混合纳米氢氧化镍的球镍电极材料的电化学活性研究 |
| Study on Electrochemical Activity of the Spherical Ni(OH)2 Electrode Mixed with Nano-Phase Ni(OH)2 |
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| 摘要: 采用配位沉淀法制备出了Ni(OH)2样品，经XRD测试为β-Ni(OH)2，TEM测试结果表明其为平均粒径50nm左右的不规则的颗粒。将所制备的纳米Ni(OH)2按8wt%的比例在球镍中混合后制成电极，可使正极的比容量提高11%左右。热分析表明，纳米Ni(OH)2的电化学活性高于球镍的电化学活性。激光拉曼光谱的测试结果说明了8wt%混合后制成的纳米电极确实有较好的放电容量，同时也证实了用拉曼光谱可以表征电极材料的充放电 |
| 关键词: 纳米氢氧化镍 拉曼光谱 电化学活性 |
| 基金项目: |
| Abstract: Nano-phase Ni(OH)2 sample was prepared by coordination-precipitation method. The sample was identified to be β phase Ni(OH)2 by XRD， about 50nm in average grain size and had irregular shape by TEM. The positive electrode was prepared by mixing 8wt% sample with spherical Ni(OH)2 to carry out charge-discharge test， and the result showed that the specific capacity of the positive electrode was increased about 11%. Through thermo analysis， it was shown that nano-phase Ni(OH)2 prepared above was of higher electrochemical activity than spherical Ni(OH)2， and the nano-electrode made by mixing nano-phase Ni(OH)2 with spherical Ni(OH)2 had higher discharge capacity by Raman spectroscopy analysis. Also it was shown that Raman spectroscopy could be used to evaluate discharge performance of the positive electrode. |
| Keywords: nano-phase Ni(OH)2 Raman spectroscopy electrochemical activity |
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| 全文下载次数: 1982 |
| 韩喜江,谢小美,徐崇泉,周德瑞,张慧姣.混合纳米氢氧化镍的球镍电极材料的电化学活性研究[J].无机化学学报,2003,19(3):247-251. |
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