| 钛掺杂对LiNi0.75Co0.25O2结构与性能的影响 |
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| 引用本文： | 贺慧,程璇,张颖,王淑芬. 钛掺杂对LiNi0.75Co0.25O2结构与性能的影响[J]. 电化学, 2006, 12(3): 243-249 |
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| 作者姓名： | 贺慧 程璇 张颖 王淑芬 |
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| 作者单位： | 厦门大学化学系,材料科学与工程系,固体表面物理化学国家重点实验室,福建,厦门,361005;厦门大学化学系,材料科学与工程系,固体表面物理化学国家重点实验室,福建,厦门,361005;厦门大学化学系,材料科学与工程系,固体表面物理化学国家重点实验室,福建,厦门,361005;厦门大学化学系,材料科学与工程系,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： | Supported by the National Natural Science Foundation of China(No.10472098) |
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| 摘 要： | 应用溶胶-凝胶法合成LiNi(0.75-x)Co0.25TixO2(x=0,0.1,0.25)系列正极材料,其结构、形貌、粒度、电化学性能由TG、XRD、SEM和电池充放电测试表征研究表明,材料的电化学性能与钛掺杂量密切相关.在钴含量不变的情况下,随着Ti含量(x)的增加,材料由六方层状结构逐渐向立方结构转变,x=0.25时,出现了立方相与六方相共存.根据实验和理论计算结果简要讨论了钛掺杂对正极材料LiNi0.75Co0.25O2结构和电化学性能的影响.
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| 关 键 词： | 锂离子电池 正极材料 钛掺杂 电化学性能 |
| 文章编号： | 1006-3471（2006）03-0243-007 |
| 收稿时间： | 2006-03-31 |
| 修稿时间： | 2006-03-31 |
Effect of Ti Doping on the Structure and Performance of LiNi0.75Co0.25O2 |
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| HE Hui,CHENG Xuan,ZHANG Ying,WANG Shu-fen. Effect of Ti Doping on the Structure and Performance of LiNi0.75Co0.25O2[J]. Electrochemistry, 2006, 12(3): 243-249 |
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| Authors: | HE Hui CHENG Xuan ZHANG Ying WANG Shu-fen |
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| Abstract: | In this study,a series of Co-doped compounds with the formula of LiNi_((0.75-x))Co_(0.25)Ti_(x)O_(2)(x=0,(0.1),0.25)was synthesized by using sol-gel method.Their structure,particle size,electrochemical properties were studied by TG,XRD,SEM and electrochemical tests.It was shown that the structure of materials changed from a hexagonal layered structure to a cubic structure as the x value increased.In particular,a mixture of hexagonal and cubic structure was presented at x =0.25.The electrochemical performance of the materials depended strongly on the amount of Ti doping.Possible effects on the structure and performance of LiNi_((0.75-x))Co_(0.25)Ti_(x)O_(2) due to Ti doping are briefly discussed based upon the experiment and computational results. |
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| Keywords: | Lithium ion batteries Cathode materials Ti doping Electrochemical performance |
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