Urea-assisted combustion synthesis of porous Li1.2Ni0.13Co0.13Mn0.54O2 microspheres as high-performance lithium-ion battery cathodes

作者：Zhao Chenhao^*; Hu Zhibiao; Qiu Zehai; Liu Kaiyu

来源：Micro & Nano Letters, 2015, 10(11): 662-665.

DOI：10.1049/mnl.2015.0306

• lithium
• lithium compounds
• nickel compounds
• cobalt compounds
• nanoporous materials
• secondary cells
• crystallisation
• nanoparticles
• current density
• combustion synthesis
• nanofabrication
• urea-assisted combustion synthesis
• porous microspheres
• high-performance lithium-ion battery cathodes
• high-temperature crystallisation
• nanoparticles
• discharge capacity
• Coulombic efficiency
• current density
• lithium-rich layered oxides
• Li1.2Ni0.13Co0.13Mn0.54O2Li

An initial urea-assisted combustion and subsequent high-temperature crystallisation route have been used to prepare porous Li1.2Ni0.13Co0.13Mn0.54O2 microspheres. The as obtained microspheres with the size of 2-4 m are composed of numerous nanoparticles, and these nanoparticles with clear corner and edge have the size of 100-200 nm. A possible formation process of porous microspheres structures is discussed. As lithium-ion battery cathodes, the porous microspheres can deliver an initial discharge capacity of 252.3 mAh g(-1) with high Coulombic efficiency of 80.6% at current density of 20 mA g(-1), and keep a stable discharge capacity of 115.5 mAh g(-1) at 1000 mA g(-1). Although the sample obtained without urea only deliver a discharge capacity of 66.7 mAh g(-1) at 1000 mA g(-1). Maybe, the facile urea-assisted combustion route is suitable for the synthesis of lithium-rich layered oxides as lithium-ion battery cathodes.

• 出版日期2015-11
• 单位龙岩学院