Nanostructured Fe-Ni Sulfide: A Multifunctional Material for Energy Generation and Storage
Date
2019Author
Zhao, ChenZhang, Chunyang
Bhoyate, Sanket
Kahol, Pawan K.
Kostoglou, Nikolaos
Mitterer, Christian
Hinder, Steve
Baker, Mark
Constantinides, Georgios
Polychronopoulou, Kyriaki
Rebholz, Claus
Gupta, Ram K.
Source
CatalystsVolume
9Issue
7Google Scholar check
Metadata
Show full item recordAbstract
Multifunctional materials for energy conversion and storage could act as a key solution for growing energy needs. In this study, we synthesized nanoflower-shaped iron-nickel sulfide (FeNiS) over a nickel foam (NF) substrate using a facile hydrothermal method. The FeNiS electrode showed a high catalytic performance with a low overpotential value of 246 mV for the oxygen evolution reaction (OER) to achieve a current density of 10 mA/cm2, while it required 208 mV at 10 mA/cm2 for the hydrogen evolution reaction (HER). The synthesized electrode exhibited a durable performance of up to 2000 cycles in stability and bending tests. The electrolyzer showed a lower cell potential requirement for a FeNiS-Pt/C system (1.54 V) compared to a standard benchmark IrO2-Pt/C system (1.56 V) to achieve a current density of 10 mA/cm2. Furthermore, the FeNiS electrode demonstrated promising charge storage capabilities with a high areal capacitance of 13.2 F/cm2. Our results suggest that FeNiS could be used for multifunctional energy applications such as energy generation (OER and HER) and storage (supercapacitor).