研究论文

溶剂热电化学法制备Li3+xV1-xSixO4薄膜

  • 祝宝军1 ,
  • 陶 颖2 ,
  • 张 旸1 ,
  • 郑 锐1 ,
  • 邹小林1
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  • (1. 湖南大学 材料科学与工程学院, 长沙410082; 2. 中南大学 材料科学与工程学院, 长沙 410083)

收稿日期: 2009-07-03

  修回日期: 2009-10-14

  网络出版日期: 2010-05-12

基金资助

国家自然科学基金(50602051)

Preparation of Li3+xV1-xSixO4 Films by Solvthermal Electrochemical Method

  • ZHU Bao-Jun1 ,
  • TAO Ying2 ,
  • ZHANG Yang1 ,
  • ZHENG Rui1 ,
  • ZOU Xiao-Lin1
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  • (College of Materials Science and Engineering, Hunan University, Changsha 410082, China; 2. College of Materials Science and Engineering, Central South University, Changsha 410083, China)

Received date: 2009-07-03

  Revised date: 2009-10-14

  Online published: 2010-05-12

摘要

采用溶剂热电化学法, 于SiO2、V2O5、LiOH的乙醇溶液组成的反应体系中, 在Pt基体上制备出致密的Li3+xV1-xSixO4薄膜. XRD、IR、Raman分析表明, 薄膜结晶状态良好, 具有γ-Li3PO4型结构. 其化学组成为0.4 (Li4SiO4)- 0.6(Li3VO4). 薄膜中无Li2SiO3杂质相存在. 低沸点乙醇溶液体系, 能够提高反应釜内的压力, 有利于促进薄膜的生成. 组成元素在醇溶液体系离子浓度小, 薄膜生成速度小, 导致薄膜结构致密, 表面光滑.

本文引用格式

祝宝军1 , 陶 颖2 , 张 旸1 , 郑 锐1 , 邹小林1 . 溶剂热电化学法制备Li3+xV1-xSixO4薄膜[J]. 无机材料学报, 2010 , 25(6) : 631 -634 . DOI: 10.3724/SP.J.1077.2010.00631

Abstract

Dense crystalline Li3VO4/Li4SiO4 solid solution films were prepared on Pt substrate electrochemically in SiO2, V2O5, LiOH, absolute ethyl alcohol solution. XRD, IR, and Raman analyses indicate that the films are well-crystallized with γ-Li3PO4 structure. No Li2SiO3 impurity is found in the sample. The chemical composition of the film is 0.4 (Li4SiO4)-0.6(Li3VO4). Using a low boiling point ethyl alcohol as solvent can improve the films properties due to the increased vapor pressure generated in the reaction. The absolute ethyl alcohol of the reaction system facilitated the formation of the Li3+xV1-xSixO4 phase. The surface of the films is smooth and fine grained due to the low solubility of the constituent ions in the solvent and the low formation speed of the films.

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