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Issue 44, 2019
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Selective design of binder-free hierarchical nickel molybdenum sulfide as a novel battery-type material for hybrid supercapacitors

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Abstract

Recently, binder-free and hierarchical electrode materials have attracted special attention for the rational design of high-energy density hybrid supercapacitors. Herein, we demonstrated binder-free nickel molybdenum sulfide nano-flakes on nickel foam (NMS-Ni) using a facile successive ionic layer adsorption and reaction (SILAR) process for the fabrication of high-performance hybrid supercapacitors. The selective SILAR cycles had a significant effect on the morphology and electrochemical properties of the NMS nanostructures. Specifically, the NMS deposited for 40 cycles (40cyc@NMS-Ni) displayed the maximum areal capacity (CAc) of 2.8 C cm−2 (2224 C g−1) at the current density 4 mA cm−2 in a 6 M KOH electrolyte. Furthermore, a hybrid supercapacitor (HSC) was fabricated using 40cyc@NMS-Ni as the positive electrode and N,O-enriched activated carbon (N,O-AC)-coated Ni-foam as the negative electrode, which showed the maximum potential and specific capacitance (CF-cell) of 1.5 V and 111 F g−1, respectively. Moreover, the device displayed an outstanding specific energy and specific power of 35 W h kg−1 and 1.5 kW kg−1 with an excellent capacitance retention (95%) after 5000 cycles, respectively. Thus, based on the observed results, it can be concluded that the present study demonstrates a route to utilize NMS-based electrodes as a promising material for high-performance energy storage devices.

Graphical abstract: Selective design of binder-free hierarchical nickel molybdenum sulfide as a novel battery-type material for hybrid supercapacitors

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Supplementary files

Article information


Submitted
05 Aug 2019
Accepted
12 Oct 2019
First published
15 Oct 2019

J. Mater. Chem. A, 2019,7, 25467-25480
Article type
Paper

Selective design of binder-free hierarchical nickel molybdenum sulfide as a novel battery-type material for hybrid supercapacitors

R. Manikandan, C. J. Raj, G. Nagaraju, M. Pyo and B. C. Kim, J. Mater. Chem. A, 2019, 7, 25467
DOI: 10.1039/C9TA08527K

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