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71. 发明授权

US06827921B1 Nanostructured Li4Ti5O12 powders and method of making the same 失效
标题翻译：纳米结构的Li4Ti5O12粉末及其制备方法
公开(公告)号：US06827921B1
公开(公告)日：2004-12-07
申请号：US10058715
申请日：2002-01-28
申请人： Amit Singhal , Ganesh Skandan
发明人： Amit Singhal , Ganesh Skandan
IPC分类号： C01G2300
CPC分类号： B82Y30/00 , C01G23/005 , C01P2002/72 , C01P2004/01 , C01P2004/64
摘要： Ultrafine powders of Li4Ti5O12 with particles in the size range of 25-500 nm. The average size of particles is about 500 nm of less, preferably about 300 nm or less. The particles are composed of nanocrystallites, which have an average size about 30 nm. This invention also includes the method of producing these ultrafine Li4Ti5O12 particles. The process utilizes (i) nanoparticles of TiO2, (ii) a lithium salt, and (iii) an organic solvent with a boiling point in the range of 70-230° C. The process is carried out at pressures in the range of 0.5 to 10 atmospheres. The inorganic salt of Li is mixed with TiO2 nanoparticles (˜20-25 nm) in the organic solvent. The solution is heated to a temperature and at a pressure to facilitate the diffusion of Li ions in to nanoparticles. After completion of the reaction, the powder is heat treated in O2 or an inert gas to form the desired phase.
摘要翻译：超细粉末Li4Ti5O12，粒径范围在25-500nm。颗粒的平均尺寸为约500nm较小，优选约300nm或更小。颗粒由纳米晶体组成，其平均尺寸约为30nm。本发明还包括生产这些超细Li 4 Ti 5 O 12颗粒的方法。该方法使用（i）TiO 2的纳米颗粒，（ii）锂盐和（iii）沸点在70-230℃范围内的有机溶剂。该方法在0.5的压力下进行至10个大气压。将Li的无机盐与有机溶剂中的TiO 2纳米颗粒（〜20-25nm）混合。将溶液加热至温度和压力以促进Li离子扩散到纳米颗粒中。反应完成后，将粉末在O 2或惰性气体中热处理以形成所需相。

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