Issue 44, 2019

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

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

Supplementary files

Article information

Article type
Paper
Submitted
05 Aug 2019
Accepted
12 Oct 2019
First published
15 Oct 2019

J. Mater. Chem. A, 2019,7, 25467-25480

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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