Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 828, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154447
Keywords
Asymmetric supercapacitor; Electrodeposition; Carbon cloth; CNTs; Nickel hydroxide; Self-discharging
Categories
Funding
- Basic Science Research Program through the National Research Foundation (NRF) of Korea [NRF-2017R1A2B2001838]
- Ministry of Science, ICT & Future Planning
- Korea Institute for Advancement of Technology (KIAT) - Korea Government (MOTIE) [P0002007]
- National Research Foundation of Korea [31Z20130012940, 21A20130012631] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
Technological advancement in portable electronic devices is often inhibited by the inadequate capacity of energy-storage devices. Asymmetric all-solid-state supercapacitors (ASSCs) can overcome energy-storage limitations of symmetric ASSCs by utilizing two different electrodes to extend the operating voltage window without decomposition of the electrolyte. Here, we report on the fabrication of carbon cloth (CC)/nickel hydroxide (Ni(OH)(2)) and CC/carbon nanotubes (CNTs) electrodes, consisting of conformal nanoparticles of Ni(OH)(2) and nanostructured CNTs grown directly on the grooves and crests of carbon fibers, to provide additional active area for charge storage. The CC/Ni(OH)(2) electrodes display an exceptional specific capacitance (C-s) of 3987 F g(-1) and an areal capacitance (C-a) of 1248 mF cm(-2), whereas the CC/CNTs electrodes exhibit a C-s of 928 F g(-1) and C-a of 278 mF cm(-2). Furthermore, the asymmetric ASSCs employing CC/Ni(OH)(2) as an anode and CC/CNTs as a cathode, exhibit a C-s of 196 F g(-1) at a cell potential of 1.8 V, yielding an energy density of 132.7 Wh kg(-1). Moreover, the asymmetric ASSCs display improved low self-discharge behavior by charging it at an optimal current density and time. The results suggest that the asymmetric ASSCs are a low cost and efficient alternative in energy storage applications. (C) 2020 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available