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Fabrication of Li + ‐Conductive Li 2 ZrO 3 ‐Based Shell Encapsulated LiNi 0.5 Co 0.2 Mn 0.3 O 2 Microspheres as High‐Rate and Long‐Life Cathode Materials for Li‐Ion Batteries
Author(s) -
Wu Hao,
Wang Zongyi,
Liu Shengjie,
Zhang Li,
Zhang Yun
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201500303
Subject(s) - materials science , faraday efficiency , cathode , anode , chemical engineering , sintering , coating , electrochemistry , graphite , ternary operation , fabrication , nanotechnology , electrode , composite material , chemistry , medicine , alternative medicine , computer science , programming language , engineering , pathology
Ternary layered LiNi 0.5 Co 0.2 Mn 0.3 O 2 microspheres are functionally surface‐modified with a fast‐Li + ‐conductive Li 2 ZrO 3 ‐based shell through a facile synthetic strategy based on an infiltrative pre‐coating treatment combined with a single‐step post‐sintering process. Owing to the complete nanoscale Li 2 ZrO 3 shell coating, which has a 3D diffusion path for Li + , the resultant coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 microspheres manifest remarkably enhanced rate capability and cycling performance as cathode materials both at room and elevated temperature when tested in a half Li‐ion battery cell. Moreover, the combination of the coated LiNi 0.5 Co 0.2 Mn 0.3 O 2 cathode and a commercial graphite anode into a full cell not only delivers a remarkable specific capacity of 140 mAh g −1 under 1 C, but also exhibits an excellent capacity retention of 78 % with a high coulombic efficiency of over 99.5 % after 100 cycles, which demonstrates its application as a promising electrochemical device for energy storage and conversion.