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tructure Al掺杂LiNi1-xAlxO2固溶体的制备及结构研究

宫 杰1,2, 王春忠2, 杨景海1, 王雅新 1, 宗占国1   

  1. 1. 吉林师范大学凝聚态物理研究所, 四平 136000; 2. 吉林大学材料科学与工程学院, 长春 130023
  • 收稿日期:2002-03-12 修回日期:1900-01-01 出版日期:2002-07-26 发布日期:2002-07-26
  • 通讯作者: 宫 杰

Synthesis and Structure of Al Doped LiNi1-xAlxO2 Solid Solutions

GONG Jie1,2, WANG Chun-zhong2, YANG Jing-hai 1, WANG Ya-xin1, ZONG Zhan-guo1   

  1. 1. Institute of Solid States Physics, Jilin Normal University, Sipin g 136000, China;2. College of Materials Science and Engineering, Jilin University, Changchun 130023, China
  • Received:2002-03-12 Revised:1900-01-01 Online:2002-07-26 Published:2002-07-26
  • Contact: GONG Jie

摘要: 通过研究LiNiO2和α-LiAlO2的制备条件对结构的影响, 总结出一种新的制备方法, 成功地合成出Al连续固溶的LiNi1-xAlxO2(x=0~1.0). 烧结实验表明, 在用小量Al固溶时材料 的合成需要在氧气气氛中进行, Al掺杂能够抑制结构中锂缺位, 降低材料形成温度及在合成过程中对氧气的依赖程度. X射线衍射结果表明, 所有样品均具有α-NaFeO2型单相结构 , 随着Al固 溶量的增加, 材料的晶胞参数发生变化, a轴缩短, c/a比增大, 晶胞体积V0减小, 材料的层状属性更加明显.

关键词: α-NaFeO2型结构, 固溶体, 形成焓

Abstract: We have found a new synthesizing method by means of studying the effects of the synthesizing conditions on the structures of LiNiO 2 and LiAlO2, respectively, and successfully synthesized Al doped LiN i1xAlxO2(x=0~1.0) solids solutions. T he sintering experimental results show that the samples with low Al content must be synthesized in the oxygen atmosphere. Al doping can not only inhibit the lithium deficiency but decrease the forming temperature of the products and their dependency on oxygen during synthesizing them. From XRD results we found out that all the samples crystallized in the α-NaFeO2 structure. The lattice parameters change with incr easing Alcontentviz axis a is shortened, larger the c/a ratio is increased and crystal volume V0 is decreased. These changes show that the syn thesized samples well crystallized in the layer structure.

Key words: structure of α-NaFeO2 form, solid solution, formati on enthalpy

中图分类号: 

  • O641