| LiNi0.3Co0.7O2的结构及其锂电池行为的研究 |
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| 引用本文： | 章福平. LiNi0.3Co0.7O2的结构及其锂电池行为的研究[J]. 高等学校化学学报, 1995, 16(5): 770-774 |
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| 作者姓名： | 章福平 |
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| 作者单位： | 复旦大学化学系, 上海, 200433 |
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| 基金项目： | 国家科委八六三高技术项目 |
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| 摘 要： | 利用XRD、XPS、CV等方法研究了LiNi0.3Co0.7O2的结构及其锂电池行为。结果表明:LiNi0.3Co0.7O2具有六方晶系空间群结构,其晶胞参数a=0.2826nm,c=1.4130nm;其表面存在Li2O;Li+在其中的化学扩散系数为1～7×10-8cm2·s-1;其锂电池在4.30～3.00V间放电容量可达120～140mA·h·g-1,放电机理为Li+在其中进行两步嵌入反应。
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| 关 键 词： | 锂电池 锂镍钴氧化物 嵌入反应 光电子能谱 |
| 收稿时间： | 1994-05-10 |
Studies on the Structure of LiNi_(0.3)Co_(0.7)O_2 and the Behaviorof Its Lithium Battery |
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| ZHANG Fu-Ping. Studies on the Structure of LiNi_(0.3)Co_(0.7)O_2 and the Behaviorof Its Lithium Battery[J]. Chemical Research In Chinese Universities, 1995, 16(5): 770-774 |
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| Authors: | ZHANG Fu-Ping |
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| Affiliation: | Department of Chemistry, Fudan University, Shanghai, 200433 |
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| Abstract: | XRD, XPS and CV have been used to study the structure of LiNi0.3Co0.7O2 and the behavior of its lithium battery. It is shown that LiNi0.3Co0.7O2 has a space group R3m with hexagonal parameter a=0. 2826 nm,c=1. 4130 nm. Li2O was identified on its surface. Its lithium battery exhibited a discharge capacity of 120-140 mA. h. g-1at the rate of 0. 5-0. 1 mA. cm-2in the voltage range of 4. 30-3. 00 Vin 1mol. L-1LiClO4/PCsystem. The discharge mechanism of the battery involved a two-stage Li+intercalation in LiNi0.3Co0.7O2.Also, the chemical diffusion coefficent of Li+in LixNi0.3Co0.7O2 is about 1-7×10-8cm2· s-1in the range of x from 0. 775 to 1. |
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| Keywords: | Lithium battery Lithium nickel cobalt oxide Intercalation reaction XPS |
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