Direct Fabrication of Lithium Double Oxides Films by Solution Processes

通过溶液法直接制备锂双氧化物薄膜

• 批准号: 11450244
• 负责人: YOSHIMURA Masahiro
• 金额: $ 8.38万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450244/
• 关键词: NiCoO_2; LiNiO_2; Film; Solution Process; Hydrothermal; Electrochemical; Soft Process

Lithiuun double oxides like LiCoO_2, LiNiO_2, etc. are most extensively studied for electrode materials for lithium batteries. Their films have been fabricated by sol-gel, spray-pyrolysis, CVD and PVD including sputtering and laser ablation methods in vacuum. Those methods would consume huge amount of energies by heating/firing at >800 ℃, creating highly energetic species, and/or keeping vacuum. To minimize the consumption of energies and materials, we are proposing "Soft Solution Processing" to fabricate highly functional ceramics film like lithium double oxides.In the present study, we have succeeded to fabricate the films of LiCoO_2 and/or LiNiO_2 directly in aqueous solutions at low temperatures at RT-200℃ without any post-firing. The developed hydrothermal/electrochemical methods enable us to fabricate those films on Pt, Ni, Graphite, as well as Ni on Co substrates. They are well-crystallized and electrochemically active. We could also demonstrate a possible a possible direct patterning of ceramic films on any substrate including organic porous materials like paper/cloth/polymers.

锂离子双氧化物如LiCoO_2、LiNiO_2等是锂电池电极材料研究最为广泛的材料。采用溶胶-凝胶法、喷雾热解法、CVD法和PVD法（包括溅射法和激光烧蚀法）在真空条件下制备了薄膜。这些方法会消耗大量的能量，通过加热/在800℃下烧制，产生高能量的物质，和/或保持真空。为了最大限度地减少能源和材料的消耗，我们提出了“软溶液加工”来制造高功能的陶瓷薄膜，如锂双氧化物。在本研究中，我们成功地在RT-200℃的低温水溶液中直接制备了LiCoO_2和/或LiNiO_2薄膜，而无需任何后处理。开发的水热/电化学方法使我们能够在Pt， Ni，石墨以及Ni在Co衬底上制造这些薄膜。它们结晶良好，电化学活性高。我们还可以演示陶瓷薄膜在任何基材上的直接图案化，包括有机多孔材料，如纸/布/聚合物。

项目成果

Masahiro TOSHIMURA: "Recent Developments in Soft,Solution Processing: One Step Fabrication of Functional Double Oxide Films by Hydrothermal-Electrochemical Methods"J. Mater. Chem.. 9〔1〕. 77-82 (1999)

Masahiro TOSHIMURA：“软溶液加工的最新进展：通过水热电化学方法一步制备功能性双氧化物薄膜”J. Chem. 9〔1〕。

Masahiro Yoshimura: "Recent developments in soft, solution processing : one step fabrication of functional double oxide films by hydrothermal-electrochemical methods"J.Mater.Chem.. 0. 77-82 (1999)

Masahiro Yoshimura：“软溶液加工的最新进展：通过水热电化学方法一步制造功能性双氧化膜”J.Mater.Chem.. 0. 77-82 (1999)

Masahiro Yoshimura: "Soft, Solution Processing : in situ Fabrication of Morphology-controlled Advanced Ceramic Materials in Low Temperature Solution without Firing."Bull.Maer.Sci.. 22[3]. 193-199 (1999)

Masahiro Yoshimura：“软溶液加工：在低温溶液中原位制造形态控制的先进陶瓷材料，无需烧成。”Bull.Maer.Sci.. 22[3]。

S.W.Song: "Effect of LiOH concentration change on simultaneous preparation of LiCoO_2 film and powder by hydrothermal method"Solid State Ionics. 135. 277-281 (2000)

宋世伟：“LiOH浓度变化对水热法同时制备LiCoO_2薄膜和粉末的影响”，固态离子学。

Seung-Wan Song: "Laser Power Effect on Micro-Raman Spectra of LiCoO2 Thin-film Fabricated on Cobalt Metal Substrate"Applied ′Physics Letters. (印刷中). (2001)

Seung-Wan Song：“激光功率对钴金属基底上制造的 LiCoO2 薄膜的显微拉曼光谱的影响”应用物理快报（2001 年出版）。