| 合成气氛对LiNi0.75Co0.25O2性能的影响 |
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| 引用本文： | 贺慧,程璇,张颖,杨勇. 合成气氛对LiNi0.75Co0.25O2性能的影响[J]. 电源技术, 2005, 29(2): 75-77 |
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| 作者姓名： | 贺慧 程璇 张颖 杨勇 |
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| 作者单位： | 厦门大学,材料科学与工程系,福建,厦门,361005;厦门大学,化学系,福建,厦门,361005;厦门大学,固体表面物理化学国家重点实验室,福建,厦门,361005 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
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| 摘 要： | 利用溶胶-凝胶方法分别在氧气和空气气氛下合成了锂离子蓄电池正极材料LiNi0.75Co0.25O2,并对该材料进行了XRD分析、Rieveld结构精修以及电化学测试,初步探讨了合成气氛对LiNi0.75Co0.25O2结构及其电化学性能的影响。结果证实,当采用溶胶-凝胶预处理固相合成方法时,在氧气气氛下合成的锂离子蓄电池正极材料LiNi0.75Co0.25O2的电化学性能要好于在空气中合成的LiNi0.75Co0.25O2,并通过对该材料进行Rieveld结构精修进一步解释了该现象。
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| 关 键 词： | 锂离子蓄电池 正极材料 Rieveld结构精修 电化学性能 |
| 文章编号： | 1002-087X(2005)02-0075-03 |
| 修稿时间： | 2004-05-18 |
Influence of sintering atmosphere on the performance of LiNi0.75Co0.25O2 cathode materials for lithium ion batteries |
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| HE Hui,CHENG Xuan,ZHANG Ying,YANG Yong. Influence of sintering atmosphere on the performance of LiNi0.75Co0.25O2 cathode materials for lithium ion batteries[J]. Chinese Journal of Power Sources, 2005, 29(2): 75-77 |
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| Authors: | HE Hui CHENG Xuan ZHANG Ying YANG Yong |
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| Abstract: | The cathode materials, LiNi0.75Co0.25O2, for lithium ion batteries were synthesized at oxygen and air atmospheres, respectively, by sol-gel method. The materials were studied by powder X-ray diffraction (XRD), analyzed by Rietveld structure refinement method and examined by performing electrochemical charge-discharge measurements. The effects of sintering atmosphere on the structure and electrochemical properties of LiNi0.75Co0.25O2 were discussed based on the experimental results. It was confirmed that the electrochemical performance of LiNi0.75Co0.25O2 prepared at O2 atmosphere was better than that of which at air atmosphere. Further interpretation in the influence of atmosphere was provided by carrying out the Rietveld structure refinement analysis. |
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| Keywords: | lithium ion batteries cathode materials Rietveld structure refinement electrochemical performance |
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