Biomass-derived wearable energy storage systems based on poplar tree-cotton fibers coupled with binary nickel-cobalt nanostructures

Date

2020-02-01

Author

Hekmat, Farzaneh
Ünalan, Hüsnü Emrah
Shahrokhian, Saeed

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

179
views

0
downloads

We hereby demonstrate symmetric and asymmetric supercapacitors (SSCs and ASCs) based on core/shell-like Ni-Co oxide@cotton//Fe2O3-carbon nanotubes@cotton that are capable of storing a remarkable amount of energy, while retaining a high power density and long cycle life. Hierarchical, porous structures of Ni-Co-O nano-rod (NR) decorated Pd-activated cotton fibers (CFs) were fabricated using an eco-benign hydrothermal method and directly used as the cathode of the supercapacitors. Fe2O3-single-wall carbon nanotube (SWCNT) decorated CFs were employed as anodes of the fabricated ASCs. The assembled Ni-Co-O@cotton//Fe2O3-SWCNTs@cotton based ASCs possessed the benefits of a relatively high energy density of 16.3 W h kg(-1) at a reasonable power density of 600 W kg(-1) while showing remarkable cycling durability, retaining around 85% of their initial specific capacity after 4000 charge-discharge cycles. The capacitive performance of the fabricated Ni-Co-O@cotton//Fe2O3-SWCNTs@cotton based ASCs was preserved even if they were bent or folded. We believe that the fabricated ASCs are promising storage devices for practical applications in high-performance wearable electronics.

Subject Keywords

Nanosheet arrays, Carbon nanotubes, Highly efficient, Supercapacitors, Graphene, Cloth, Nanocomposite, Nanoparticles, Construction, Spectroscopy

URI

https://hdl.handle.net/11511/32731

Journal

SUSTAINABLE ENERGY & FUELS

DOI

https://doi.org/10.1039/c9se00565j

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Scalable, microwave-assisted decoration of commercial cotton fabrics with binary nickel cobalt sulfides towards textile-based energy storage Hekmat, Farzaneh; Balim, Umur; Ünalan, Hüsnü Emrah (2022-02-01) High-performance textile-based energy storage systems with high energy and power densities alongside remarkable cyclic life are always at the leading edge of wearable electronics. Herein, commercial cotton fabrics (CCFs) are used as the substrates for the fabrication of ultra-light, high-performance wearable supercapacitors. Hierarchical microstructures of nickel-cobalt sulfide (Ni-Co-S) decorated single-walled carbon nanotubes (SWCNTs) are used as the positive supercapacitor electrodes. Enhanced electroche...
Flexible supercapacitor electrodes with vertically aligned carbon nanotubes grown on aluminum foils Dogru, Itir Bakis; Durukan, Mete Batuhan; Turel, Onur; Ünalan, Hüsnü Emrah (2016-06-01) In this work, vertically aligned carbon nanotubes (VACNTs) grown on aluminum foils were used as flexible supercapacitor electrodes. Aluminum foils were used as readily available, cheap and conductive substrates, and VACNTs were grown directly on these foils through chemical vapor deposition (CVD) method. Solution based ultrasonic spray pyrolysis (USP) method was used for the deposition of the CNT catalyst. Direct growth of VACNTs on aluminum foils ruled out both the internal resistance of the supercapacitor...
Hybrid energy storage device from binder-free zinc-cobalt sulfide decorated biomass-derived carbon microspheres and pyrolyzed polyaniline nanotube-iron oxide Hekmat, Farzaneh; Hosseini, Hadi; Shahrokhian, Saeed; Ünalan, Hüsnü Emrah (2020-03-01) High-performance supercapacitors that merit superior power and energy densities, as well as long-term cycle durability are always of great significance as a building block of energy storage devices. Herein, an innovative strategy is developed to design hierarchical and unique porous structures of ternary metal sulfide nano-flake decorated porous hydrothermal carbon microspheres. Hierarchical microspheres of ternary zinc-cobalt sulfide nanosheet (NS) decorated biomass derived hydrothermal carbon spheres (HTC...
Energy Conversion Efficiency of Single-Phase Transformerless PV Inverters Özkan, Ziya; Hava, Ahmet Masum (2013-11-30) In grid-connected photovoltaic (PV) applications, power semiconductor energy conversion efficiency of PV inverters is one of the major figures of merits to evaluate and compare these systems as the payback ratio of the overall system is tightly related to the energy conversion efficiency and as semiconductor losses comprise the majority of energy losses. In order to wisely choose the PV inverter topology and associated semiconductors, analytic evaluation of semiconductor losses of topologies is required. Fu...
Broadband terahertz modulators using self-gated graphene capacitors Kakenov, Nurbek; Balci, Osman; Polat, Emre O.; Altan, Hakan; KOCABAŞ, COŞKUN (2015-09-01) We demonstrate a terahertz intensity modulator using a graphene supercapacitor which consists of two large-area graphene electrodes and an electrolyte medium. The mutual electrolyte gating between the graphene electrodes provides very efficient electrostatic doping with Fermi energies of 1 eV and a charge density of 8 x 10(13) cm(-2). We show that the graphene supercapacitor yields more than 50% modulation between 0.1 and 1.4 THz with operation voltages less than 3 V. The low insertion losses, high modulati...

Citation Formats

F. Hekmat, H. E. Ünalan, and S. Shahrokhian, “Biomass-derived wearable energy storage systems based on poplar tree-cotton fibers coupled with binary nickel-cobalt nanostructures,” SUSTAINABLE ENERGY & FUELS, pp. 643–654, 2020, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32731.