Fabrication in a Single Synthetic Step of Electrochemically Active LiMO2 (M = Ni and Co) Thin-Film Electrodes Using Soft Solution Processing at 20-200 
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- 作者：Kyoo-Seung Han ; Seung-Wan Song ; and Masahiro Yoshimura
- 刊名：Chemistry of Materials
- 出版年：1998
- 出版时间：August 1998
- 年：1998
- 卷：10
- 期：8
- 页码：2183 - 2188
- 全文大小：247K
- 年卷期：v.10,no.8(August 1998)
- ISSN：1520-5002
文摘
Well-crystallized and electrochemically active Li1-xNi1+xO2 and LiCoO2 thin-film electrodesfor lithium rechargeable microbatteries can be fabricated in a single synthetic step usingan economical, less energy consuming, and environmentally friendly "Soft Solution Processing" method in a concentrated LiOH solution at fixed temperatures between 20 and 200 
Cwithout any postsynthesis annealing. While the purely hydrothermal treatment of cobaltplates directly leads to the formation of LiCoO2 films, Ni(OH)2 films on nickel plates arefabricated under the same hydrothermal conditions. By using the electrochemical-hydrothermal approach under supplementary galvanostatic charge with the same hydrothermal conditions, Li1-xNi1+xO2 films can only be effectively prepared in a single syntheticstep from nickel plates. Such different activation methods required for the preparation ofLiCoO2 and Li1-xNi1+xO2 films respectively can be ascribed to the different metal cationvalencies between dissolved nickel species (that contain divalent nickel) and dissolved cobaltspecies (that should possess trivalent cobalt).
Cwithout any postsynthesis annealing. While the purely hydrothermal treatment of cobaltplates directly leads to the formation of LiCoO2 films, Ni(OH)2 films on nickel plates arefabricated under the same hydrothermal conditions. By using the electrochemical-hydrothermal approach under supplementary galvanostatic charge with the same hydrothermal conditions, Li1-xNi1+xO2 films can only be effectively prepared in a single syntheticstep from nickel plates. Such different activation methods required for the preparation ofLiCoO2 and Li1-xNi1+xO2 films respectively can be ascribed to the different metal cationvalencies between dissolved nickel species (that contain divalent nickel) and dissolved cobaltspecies (that should possess trivalent cobalt).