Effect of ultrasonic irradiation on the structure and electrochemical properties of cathode material LiNi_0.5Mn_0.5O₂ for lithium batteries

详细信息	查看全文 | 推荐本文 |

• 作者：Bin Zhang ; Gang Chen ; Ping Xu ; Zushun Lv
• 关键词：LiNi_0.5Mn_0.5O₂ ; Lithium battery ; Layered structure ; Ultrasonic irradiation ; Cathode material
• 刊名：Solid State Ionics
• 出版年：2007
• 期刊代码：96_01672738
• 类别：ch
• 出版时间：15 July 2007
• 卷：178
• 期：19-20
• 页码：1230-1234
• 文件大小：1282 K

摘要

Substituting mechanical stirring by ultrasonic irradiation in co-precipitation method, cathode material LiNi_0.5Mn_0.5O₂ for lithium batteries with better layered structure and crystallinity has been successfully synthesized. The physicochemical and electrochemical properties of ultrasonic co-precipitation (UCP) prepared material were compared with those of the mechanical stirring co-precipitation (MSCP) prepared material by thermogravimetery analysis (TGA), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV), and galvanostatic charge–discharge testing in detail. UCP prepared LiNi_0.5Mn_0.5O₂ presents better rate discharge capability, cyclic stability and reversibility, resulting from smaller electrochemical polarization during electrode reaction and easier lithium ion insertion/desertion. Application of ultrasonic irradiation during the co-precipitation preparation process is beneficial to produce samples with better physicochemical and electrochemical properties.