Fabrications of High-Capacity Alpha-Ni(OH)2
| Autor: | William C. Mays, Tiejun Meng, Kwo-Hsiung Young, Haoting Shen, Shuli Yan, Xingqun Liao, Lixin Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Overcharge
Analytical chemistry Energy Engineering and Power Technology core–shell structure 02 engineering and technology Electron 010402 general chemistry 01 natural sciences nickel metal hydride battery Stress (mechanics) Matrix (chemical analysis) Nickel–metal hydride battery Phase (matter) lcsh:TK1001-1841 Electrochemistry Electrical and Electronic Engineering alpha nickel hydroxide Chemistry Metallurgy High capacity 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:Production of electric energy or power. Powerplants. Central stations continuous stirring single reactor process lcsh:Industrial electrochemistry Particle 0210 nano-technology lcsh:TP250-261 |
| Zdroj: | Batteries, Vol 3, Iss 1, p 6 (2017) Batteries; Volume 3; Issue 1; Pages: 6 |
| ISSN: | 2313-0105 |
| Popis: | Three different methods were used to produce α-Ni(OH)2 with higher discharge capacities than the conventional β-Ni(OH)2, specifically a batch process of co-precipitation, a continuous process of co-precipitation with a phase transformation step (initial cycling), and an overcharge at low temperature. All three methods can produce α-Ni(OH)2 or α/β mixed-Ni(OH)2 with capacities higher than that of conventional β-Ni(OH)2 and a stable cycle performance. The second method produces a special core–shell β-Ni(OH)2/α-Ni(OH)2 structure with an excellent cycle stability in the flooded half-cell configuration, is innovative and also already mass-production ready. The core–shell structure has been investigated by both scanning and transmission electron microscopies. The shell portion of the particle is composed of α-Ni(OH)2 nano-crystals embedded in a β-Ni(OH)2 matrix, which helps to reduce the stress originating from the lattice expansion in the β-α transformation. A review on the research regarding α-Ni(OH)2 is also included in the paper. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|