Hierarchical mesoporous network of amorphous α − Ni(OH)2 for high performance supercapacitor electrode material synthesized from a novel solvent deficient approach
| Autor: | Balkrishna J. Lokhande, Rohan M. Kore |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Supercapacitor
Materials science General Chemical Engineering Bicarbonate Inorganic chemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Electrochemical energy conversion 0104 chemical sciences Amorphous solid chemistry.chemical_compound Ammonium bicarbonate chemistry 0210 nano-technology Mesoporous material BET theory |
| Zdroj: | Electrochimica Acta. 245:780-790 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2017.06.001 |
| Popis: | The hierarchically porous materials have led to a significant improvement in the applications of electrochemical energy conversion and storage, owing to their outstanding properties, such as high surface area, admirable ease of access to active sites, enhanced mass transport and diffusion. Hence, a significant attention has been diverted towards the synthesis of hierarchically porous nanostructured materials using various methods. Here, we report a novel, simple, scalable and robust solvent deficient approach for the synthesis of hierarchical mesoporous network of amorphous α − Ni(OH)2, using Ni(NO3)2.6H2O in the presence of ammonium bicarbonate as well as sodium bicarbonate, separately. The X−ray diffraction, Raman and FTIR studies confirms the formation of amorphous α − Ni(OH)2. The obtained mesoporous network shows the hierarchical pore size and pore volume distribution depending on the size of different spectator ions evolved during the process. The hierarchical mesoporous network is perceived from the TEM and BET analysis. The SAED pattern endorses for the amorphous nature of the samples. Furthermore, the electrochemical properties exhibit the maximum specific capacitance 2338 Fg−1 and 231 Fg−1 for α − Ni(OH)2 obtained from ammonium bicarbonate and sodium bicarbonate, respectively. Through various measurements, it has been corroborated that, the different bicarbonate used during the synthesis in solvent deficient environment strongly affects the pore size distribution and hence the electrochemical performance. In addition, the high performing electrode material has been utilized as an anode material in the asymmetric supercapacitor shows good capacitive behavior with a cycling stability of 91.08% after 5000 CV cycles. |
| Databáze: | OpenAIRE |
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