Premium
An Effectively Activated Hierarchical Nano‐/Microspherical Li 1.2 Ni 0.2 Mn 0.6 O 2 Cathode for Long‐Life and High‐Rate Lithium‐Ion Batteries
Author(s) -
Li Yu,
Bai Ying,
Bi Xuanxuan,
Qian Ji,
Ma Lu,
Tian Jun,
Wu Chuan,
Wu Feng,
Lu Jun,
Amine Khalil
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501548
Subject(s) - cathode , microstructure , materials science , nano , chemical engineering , polyvinylpyrrolidone , microscale chemistry , lithium (medication) , hydrothermal circulation , nanotechnology , composite material , chemistry , polymer chemistry , medicine , engineering , endocrinology , mathematics education , mathematics
Rechargeable lithium‐ion batteries with high energy and high power density are required in the application of electric vehicles and portable electronics. Herein, we introduce a type of spherical Li‐rich cathode material, Li 1.2 Ni 0.2 Mn 0.6 O 2 , assembled from uniform nanocubes by a facile polyvinylpyrrolidone (PVP)‐assisted hydrothermal method. The material with a hierarchical nano‐/microstructure exhibits stable high‐rate performance. Furthermore, the precipitant (i.e., urea) and the structure‐directing agent (i.e., PVP) effectively activated the Li 2 MnO 3 components in the microscale material to achieve a high specific capacity of 298.5 mAh g −1 in the first cycle. This Li‐rich cathode material still delivered 243 mAh g −1 at 0.1 C after 200 cycles and the capacity retentions at 0.5, 1, 2, and 5 C were 94.4, 78.7, 76.3, and 67.8 % after 150 cycles, respectively. The results make this Li‐rich nano‐/microstructure a promising cathode material for long‐life and high‐performance lithium‐ion batteries.