Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10624056 | Ceramics International | 2016 | 8 Pages |
Abstract
The poor electronic conductivity and huge volume expansion of NiO are the vital barriers when used as anode for lithium ion batteries. In order to solve above issues, Li-doped NiO are prepared by a facile one-step ultrasonic spray pyrolysis method. The effects of Li doping on the morphology, structure and chemical composition of the Li-doped NiO powders are extensively studied. When used as lithium ion batteries anode, it is demonstrated that the doping of Li has significant positive effect on improving the electrochemical performance. After 100 cycles at 400 mA gâ1, The Li-doped NiO samples deliver a discharge capacity of 907 mAh gâ1, much more than that of un-doped sample (736 mAh gâ1). The improved electrochemical performances can be ascribed to the improved p-type conductivity and lower impedance, which are confirmed by Rietveld refinement, X-ray photoelectron spectroscopy and electron impedance spectroscopy.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yan Li, Xinhai Li, Zhixing Wang, Huajun Guo, Tao Li,