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| LiNi1-xAlxO2(x=0～0.6)的制备和结构演变 | |
| 引用本文： | 刘伟,宫杰,杨景海,宗占国,陈岗.LiNi1-xAlxO2(x=0～0.6)的制备和结构演变[J].高等学校化学学报,2005,26(8):1484-1487. |
| 作者姓名： | 刘伟 宫杰 杨景海 宗占国 陈岗 |
| 作者单位： | 1. 吉林大学材料科学与工程学院,长春,130023 2. 吉林师范大学凝聚态物理研究所,四平,136000;长春大学应用物理研究所,长春,130022 3. 吉林师范大学凝聚态物理研究所,四平,136000 4. 长春大学应用物理研究所,长春,130022 |
| 基金项目： | 国家重点基础研究发展计划(973计划);教育部科学技术研究项目;吉林省科技发展计划 |
| 摘 要： | 通过研究LiNiO2和α-LiAlO2的制备条件,合成出LiNi1-xAlxO2(x=0～0.6)材料.XRD和XPS测试结果表明,各样品均具有α-NaFeO2型单相结构,并形成LiNi1-xAlxO2固溶体.随着Al固溶量x的增加,材料Ni(Al)—O结合能增加,晶胞的a轴缩短,c/a比增大,层状属性更加明显,结构稳定性增强.烧结实验结果表明,在低Al固溶量时,材料的合成需要在氧气气氛中进行,Al掺杂能够抑制结构中的Li缺位,降低材料形成温度及其在合成过程中对氧气的依赖程度. |
| 关 键 词： | LiNi1-xAlxO2 α-NaFeO2型结构 固溶体 结合能 |
| 文章编号： | 0251-0790（2005）08-1484-04 |
| 收稿时间： | 01 7 2005 12:00AM |
| 修稿时间： | 2005-01-07 |
Synthesis and Structure Evolution of LiNi1-xAlxO2(x=0-0.6) |
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| LIU Wei,GONG Jie,YANG Jing-hai,ZONG Zhan-guo,CHEN Gang.Synthesis and Structure Evolution of LiNi1-xAlxO2(x=0-0.6)[J].Chemical Research In Chinese Universities,2005,26(8):1484-1487. | |
| Authors: | LIU Wei GONG Jie YANG Jing-hai ZONG Zhan-guo CHEN Gang |
| Institution: | 1. College of Materials Science and Engineering, Jilin University, Changchun 130023, China; 2. Institute of Condensed State Physics, Jilin Normal University, Siping 136000, China; 3. Applied Physics Institute, Changchun University, Changchun 130022, China |
| Abstract: | LiNi1-xAlxO2 is one of new cathode materials for lithium batteries, which was a solid solution of LiNiO-2 and α-LiAlO2. However, it is difficult to synthesize the solid solution with a high aluminum solid solubility because it is easy to decompose due to its negative synthesis enthalpy. A new synthesis method was obtained by studying the preparation conditions of LiNiO-2 and α-LiAlO2, then LiNi1-xAlxO2(x=0—0.6) was synthesized successfully. The samples of LiNi1-xAlxO2(x=0—0.6)were studied by XRD and XPS, the results show that all samples have a single α-NaFeO2 structure and LiNi1-xAlxO2 solid solutions were synthesized. With the increasing of aluminum solid solubility x, not only Ni(Al)O binding energy increased, but also lattice constant decreased and the ratio of c/a increased. As a result, the bedded structure was more obvious and the stability was enhanced. |
| Keywords: | LiNi-1-xAl-xO-2 |
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