Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5147044 | International Journal of Hydrogen Energy | 2017 | 9 Pages |
Abstract
The ever-growing demand for energy has greatly stimulated recent researches on developing high-performance materials for nickel-based rechargeable batteries. However, the practical applications of Nickel-base batteries are largely hindered due to lack of high power density and long lifespan of their cathode materials, β-Ni(OH)2. Here, Al-doped α-Ni(OH)2 microspheres comprising densely packed irregular nano sheets have been synthesized via a dual complexation-precipitation (DCP) method. The resulting electrode offers a large specific capacity of 457.9 mAh gâ1 at remarkably high rate of 500 mA gâ1, which is 47.0% larger than that for β-Ni(OH)2 under the same conditions. In addition, the electrode still keeps 87.0% of the initial capacity after 2000 cycles, displaying excellent cycling performance. The outstanding electrochemical performance benefits from the synergistic contribution of the doped metal ions and the unique hierarchical structure.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Tian Wang, Junqing Pan, Kiwanuka Gasore Achille, Yanzhi Sun,