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Active and Passive Electronic Components
Volume 18 (1995), Issue 1, Pages 39-51
http://dx.doi.org/10.1155/1995/79465

A New Method for the Preparation of Fine-Grained SnO2 and WO3 Powders: Influence of the Crystallite Size on the Electrochemical Insertion of Li+ in SnO2 and WO3 Electrodes

1Laboratoire de Chimie du Solide du CNRS, Université Bordeaux I, 351 Cours de la Libération, Talence cedex 33405, France
2Laboratoire de Spectroscopie Moléculaire et Cristalline, Université Bordeaux I, 351 Cours de la Libération, Talence cedex 33405, France
3AL-Quds University, College of Science & Technology, West Bank, Jerusalem, Israel
4Institut de Chemie de la Matièra Condensée de Bordeaux, CNRS, Université Bordeaux I, Chateau Brivazac, Ave du Dr. A. Schweitzer, Pessac 33600, France

Received 20 November 1994; Accepted 30 November 1994

Copyright © 1995 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We propose an unconventional method to obtain fine-grained SnO2 and WO3 powders. It uses as precursors, polymer complexes between polyethylene oxide (POE) and SnCl4 or WCl6 respectively. By pyrolysis of these complexes in the 350-550℃ temperature range, metal-oxide powders possessing small crystallite sizes are obtained. They are free from water and hydroxyl group contaminations, which is an added advantage where the application of these materials to Li-batteries is concerned. We have, indeed, demonstrated that these powders show good ability to insert reversibly lithium ions in the Li/ Li+/SnO2 (WO3) cells.