Journal
SYNTHETIC METALS
Volume 265, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2020.116408
Keywords
Honeycomb-like; Binder-Free; Higher surface area; Asymmetric; Energy density
Funding
- Islamia University of Bahawalpur (Pakistan) [6276/Punjab/NRPU/RD/HEC/2016]
- Higher Education Commission of Pakistan [6276/Punjab/NRPU/RD/HEC/2016]
- King Saud University (KSU) [RSP-2019/49]
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The facile single-step hydrothermal route was adopted to prepare Mo doped ZnS (Mo: ZnS) with honeycomb-like structure and deposited directly on the nickel foam (NF). Benefiting from the higher surface area with hierarchical pore sized distribution, binder-free electrode/substrate contact, and intrinsically improve electronic conductivity resulting from Mo doping, Mo: ZnS@NF electrode exhibited 2208 Fg(-1) gravimetric capacitance (Cg) at the current density 1 Ag-1. The honeycomb-like the architecture of Mo: ZnS provides a larger surface area with more active sites and shortens the path for the charge diffusion. Moreover, asymmetric supercapacitors (Mo: ZnS@NF//AC@NF) display74.87 Fg(-1) Cg at 2 Ag-1 current density and long term stability with 91.3 Wo capacitance retention after 5000 CCD (cyclic charge/discharge) tests. The high energy density of 26.5 Wh kg(-1) is achieved at a power density of 1303 W kg(-1). The obtained results demonstrate the superior capacitive activity of Mo: ZnS/NF electrode for advanced energy storage devices.
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