Development of a Synthesis Reactor with High Production Rate of Lithium Manganese Oxide Fine Particles

锂锰氧化物细粒高产率合成反应器的研制

• 批准号: 15560650
• 负责人: TANIGUCHI Izumi
• 金额: $ 2.43万
• 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 (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560650/
• 关键词: Spray Pyrolysis and Fluidized Bed Hybrid System; Lithium Manganese Oxides; Namostructured particles; Lithium Ion Batteries; Cathode Materials; 噴霧熱分解; 粉粒流動層

A novel technique has been developed to directly produce fine ceramics powders from liquid solution by a fluidized bed and spray pyrolysis hybrid system. Using this technique, the preparation of lithium manganese oxides LiMn_2O_4, which are the most promising cathode materials for lithium ion battery, has been carried out for various superficial gas velocities U_0=0.30-0.91 m/s, concentrations of precursor solution C_0=0.45-4.50 mol/dm^3 and static bed heights L_s=50-150 mm. The as-prepared samples exhibited a pure cubic spinel structure without any impurities in the XRD patterns, and the chemical composition of as-prepared powders showed in a good agreement with the one of precursor solution.The as-prepared LiMn_2O_4 particles were used as cathode active materials for lithium-ion battery and electrochemical studies were carried out on the charge/discharge characteristics of the Li/LiMn_2C_4 cells. As a result, the LiMn_2O_4 particles, synthesized by the spray pyrolysis in a fluidized bed reactor, exhibited better discharge capacity and cycling behavior than those by the conventional spray pyrolysis and solid state reaction.

已经开发了一种新型技术，可以通过流化的床和喷雾热解杂交系统直接从液体溶液中生产精美的陶瓷粉末。使用这种技术，已经针对各种表面的气速U_0 = 0.30-0.91 m/s进行了制备LIMN_2O_4 LIMN_2O_4，这是锂离子电池最有前途的阴极材料，浓度为0.30-0.91 m/s，浓度的前体溶液C_0 = 0.45-4.50 = 0.45-4.4.50 mol/dm nol/dm^3 and tatatic beds l_s l_s l_s l_s。 The as-prepared samples exhibited a pure cubic spinel structure without any impurities in the XRD patterns, and the chemical composition of as-prepared powders showed in a good agreement with the one of precursor solution.The as-prepared LiMn_2O_4 particles were used as cathode active materials for lithium-ion battery and electrochemical studies were carried out on the charge/discharge characteristics of the Li/LiMn_2C_4 cells.结果，与常规喷雾热解和固态反应相比，通过喷雾热解合成的LIMN_2O_4颗粒表现出更好的放电能力和循环行为。