Morphology tuned synthesis of battery-type NiCo2O4 for high performance hybrid supercapacitors
| Autor: | Likang Fu, Qiming Liu, Shuyun Wan, Chenxia Kang, Ju Fang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Battery (electricity) Morphology (linguistics) Materials science Mechanical Engineering Metals and Alloys 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences Ammonium hydroxide chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials Sodium hydroxide Materials Chemistry 0210 nano-technology Power density |
| Zdroj: | Journal of Alloys and Compounds. 804:1-9 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.06.230 |
| Popis: | NiCo2O4, as a typical battery material, has been researched in LIB and hybrid supercapacitors. The electrochemical performance of NiCo2O4 is greatly influenced by its morphology. Interestingly, alkaline substances play a vital role in the morphology formation of NiCo2O4. Therefore, it's necessary to study the effect of alkaline substances on the morphology of NiCo2O4. In this work, nanosheet-like, ball-like and urchin-like NiCo2O4 are formed by sodium hydroxide, ammonium hydroxide and urea. Nanosheet-like NiCo2O4 formed by sodium hydroxide exhibits the most outstanding electrochemical performance. Northworthy, huge morphological changes emerge while tailoring the concentration of sodium hydroxide. Nanorod-like NiCo2O4 appears at the sodium hydroxide concentration of 0.025 M. It also displays high capacity of 866 C g−1 at 1 A g−1 and superior cycle stability with 95% capacitance retention after 10000 cycles. In the practical application, coin-type hybrid supercapacitors deliver maximum energy density of 57.78 Wh kg−1 and power density of 8000 W kg−1. |
| Databáze: | OpenAIRE |
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