Copper- and nickel-based flexible polyester electrodes for energy storage devices
- PDF / 1,319,557 Bytes
- 11 Pages / 584.957 x 782.986 pts Page_size
- 38 Downloads / 253 Views
Copper- and nickel-based flexible polyester electrodes for energy storage devices Abdulcabbar Yavuza) Engineering Faculty, Metallurgical and Materials Engineering Department, Gaziantep University, Sehitkamil, 27310 Gaziantep, Turkey a) Address all correspondence to this author. e-mail: [email protected] Received: 18 February 2020; accepted: 27 May 2020
Lightweight, inexpensive and flexible electrodes are required for flexible technological applications. As polymers are generally low cost, flexible and have low density, they are potential candidates for use as flexible electrodes. However, polymers are not conductive and thus cannot be used as electrodes or current collectors. Polymers have been coated by metals/alloys to make them conductive for use in various applications including electromagnetic shielding and sensors. In this work, a flexible electrode was successfully fabricated by electrodeposition of Cu and Ni on polyester fabric for an energy storage application. The growth of metals was carried out in non-aqueous ionic liquid electrolyte, with the deposition condition of Cu and Ni studied by means of cyclic voltammetry. Nonelectrochemical (FTIR, XRD, SEM and EDAX) characterizations of the metal-coated polyester are also presented. Modified flexible electrodes were transferred to an alkaline electrolyte for electrochemical characterization. The specific capacitance of Cu- and Ni-coated polyester reached 33.4 F/g and 50.2 F/g at the same scan rate of 5 mV/s. These results suggest an inexpensive and straightforward method for the fabrication of a flexible electrode for energy storage applications.
Introduction As flexible [1], ultrathin [2], safe [3] energy storage and conversion electrodes are required for use in various technological devices, studies into flexible electrodes have been of particular interest [4]. Flexible electrodes are also required for portable lightweight devices, smart cards, flexible displays, sensors, electronic textiles and implantable medical devices [5] as they can be easily embedded into devices. A flexible substrate could be combined with a material having high power and energy density to obtain flexible energy storage devices, including batteries [6] and supercapacitors [7], with high electrochemical performance. Flexible modified electrodes could be used in electric double-layer capacitors [8] based on the adsorption of ions on their surface, mainly consisting of carbon materials, or in a pseudocapacitor [9] having a Faradaic reaction occurring in conductive polymers or metal oxides. Furthermore, the combination of these materials constitutes the third class of supercapacitors, called the hybrid supercapacitor. Flexible electrode materials and their fabrication techniques on different substrates have recently been reviewed [10]. Fully flexible devices based on electrochemical reactions must have flexible electrodes, flexible separators and flexible current collectors. Separators, such as polyolefin, polyethylene,
© Materials Research Society 2020
polypropylene, cotton, nyl
Data Loading...
