Open AccessUrea‐assisted combustion synthesis of porous Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 microspheres as high‐performance lithium‐ion battery cathodes
Author(s) -
Zhao Chenhao,
Hu Zhibiao,
Qiu Zehai,
Liu Kaiyu
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2015.0306
Subject(s) - materials science , urea , porosity , lithium (medication) , faraday efficiency , microsphere , chemical engineering , combustion , nanoparticle , cathode , lithium ion battery , battery (electricity) , electrochemistry , nanotechnology , composite material , electrode , chemistry , organic chemistry , medicine , power (physics) , physics , quantum mechanics , engineering , endocrinology
An initial urea‐assisted combustion and subsequent high‐temperature crystallisation route have been used to prepare porous Li 1.2 Ni 0.13 Co 0.13 Mn 0.54 O 2 microspheres. The as obtained microspheres with the size of 2–4 μm 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.