溶剂热电化学法制备Li3+xV1-xSixO4薄膜

doi:10.3724/SP.J.1077.2010.00631

无机材料学报 ›› 2010, Vol. 25 ›› Issue (6): 631-634.DOI: 10.3724/SP.J.1077.2010.00631

溶剂热电化学法制备Li_3+xV_1-xSi_xO₄薄膜

祝宝军¹, 陶颖², 张旸¹, 郑锐¹, 邹小林¹

(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 出版日期:2010-06-20 网络出版日期:2010-05-12
基金资助:
国家自然科学基金(50602051)

Preparation of Li_3+xV_1-xSi_xO₄ Films by Solvthermal Electrochemical Method

ZHU Bao-Jun¹, TAO Ying², ZHANG Yang¹, ZHENG Rui¹, ZOU Xiao-Lin¹

(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:2009-07-03 Revised:2009-10-14 Published:2010-06-20 Online:2010-05-12

摘要/Abstract

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Li_3+xV_1-xSi_xO₄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.

关键词: 溶剂热电化学法, 固体电解质, 薄膜, 热力学

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 Li₂SiO₃impurity 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 Li_3+xV_1-xSi_xO₄ 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.

Key words: solvthermal electrochemical method, solid electrolyte, film, thermodynamics analysis

中图分类号:

TM912

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Li_3+xV_1-xSi_xO₄薄膜[J]. 无机材料学报, 2010, 25(6): 631-634.

ZHU Bao-Jun1, TAO Ying2, ZHANG Yang1, ZHENG Rui1, ZOU Xiao-Lin1. Preparation of Li_3+xV_1-xSi_xO₄ Films by Solvthermal Electrochemical Method[J]. Journal of Inorganic Materials, 2010, 25(6): 631-634.

参考文献

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溶剂热电化学法制备Li_3+xV_1-xSi_xO₄薄膜

Preparation of Li_3+xV_1-xSi_xO₄ Films by Solvthermal Electrochemical Method

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