1. A stable Li-deficient oxide as high-performance cathode for advanced lithium-ion batteries
- Author
-
Xiaoqing Wang, Song Jishun, Lianqi Zhang, Dawei Song, Xixi Shi, Peiyu Hou, and Jie Wang
- Subjects
Range (particle radiation) ,Materials science ,Spinel ,Dispersity ,Metals and Alloys ,Analytical chemistry ,Oxide ,chemistry.chemical_element ,Nanotechnology ,General Chemistry ,engineering.material ,Catalysis ,Cathode ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Ion ,law.invention ,chemistry.chemical_compound ,chemistry ,law ,Materials Chemistry ,Ceramics and Composites ,engineering ,Lithium ,Voltage - Abstract
Monodisperse Li-deficient Li(0.35)Ni(0.2)Co(0.1)Mn(0.7)O(2-x) spinel single crystals have been prepared for the first time. The Li-deficient oxide surprisingly delivers large reversible capacity (251.3 mA h g(-1)), outstanding cycle life and low median-voltage of 2.7 V in the range of 2.0-4.9 V. Importantly, high median-voltage (4.4 V) and superior rate capability are also obtained from 3.0 to 5.0 V. These results indicate that high-energy or high-power density can be achieved by controlling discharge cut-off voltage.
- Published
- 2015