| Autor: |
Chettiannan, Balaji, Arumugam, Gowdhaman, Mathan, Stanleydhinakar, Kandiah, Kavitha, Rajendran, Ramesh |
| Zdroj: |
ACS Applied EngineeringMaterials; 20240101, Issue: Preprints |
| Abstrakt: |
This research introduces an innovative approach to enhancing materials for supercapacitors, as well as hydrogen evolution reactions. The study involves synthesizing two-dimensional nickel metal–organic frameworks on nickel foam and the oxide-based materials derived from them and investigating the influence of various surfactants on structural architecture. Among the surfactants, sodium dodecyl sulfate (SDS) displayed the most effective outcomes. The SDS-assisted Ni-MOF-derived NiO demonstrated better electrochemical characteristics when served as one of the electrodes in a supercapacitor exhibiting a high specific capacity of 841.2 C·g–1(equivalent to 1682.4 F·g–1) when tested at 1 A·g–1, and maintained 92.9% of this capacity after 5000 charge–discharge cycles. This represents significant improvements over surfactant-free materials, with a 26% increase in specific capacitance. In an asymmetric supercapacitor setup, the material demonstrated an impressive energy density (67.89 Wh·kg–1) coupled with a power density of 750 W·kg–1. When applied to the hydrogen evolution reaction, it reached 10 mA·cm–2with an overpotential of only 87 mV. It also showed a consistent performance over 24 h. The findings highlight how surfactant-assisted synthesis of Ni-MOF and subsequent derivation resulted in interlinked nanoparticle assemblies arranged in a hierarchical, blossom-like superstructure, which significantly enhances both electrochemical and hydrogen evolution performance. The study underscores the potential of tailored MOF synthesis in developing advanced materials for sustainable energy applications. |
| Databáze: |
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