Bulletin of ANPA

Abstract submitted to ANPA Conference July 14–16, 2023

Volume 5, Number 1

Applied and Engineering Physics

Abstract ID: ANPA2023-N0005

Abstract:

ANPA2023-N0005: Pseudocapacitive Manganese Oxide/Carbon Nanotubes Electrodes for High Capacity Supercapacitors

Authors:

• Tara Dhakal; Electrical and Computer Engineering Department Binghamton University, State University of New York, NY

In recent years, supercapacitors are fetching limelight due to their unique electrochemical properties that make these systems offer higher energy density, higher power density and longer cycle-life. Supercapacitors can be considered a device between batteries and dielectric capacitors as they combine the properties of both capacitors (which can deliver energy in very short time) and batteries (which can store high amount of energy). Hybrid supercapacitors use a composite of high electronic conductivity carbonaceous materials and transition metal oxides in order to greatly improve the electrochemical performance. In this project, carbon nanotubes (CNTs) are used as the electric double layer capacitor (EDLC) type material combined with the pseudocapacitive nature of manganese oxide (MnO2). A simple and highly efficient electrodeposition method was used to produce high surface area nanoflower like hierarchical manganese oxide on the CNTs grown on a flexible carbon fabric (CF) substrate. This binder-free nanostructured MnO2/CNT composite electrode material exhibited an excellent electrochemical energy storage capability with high specific capacitance of 219 F g-1, an areal capacitance of 1.5 F/cm2, and ~86% capacity retention after 2000 cycles. Such enhanced performance comes from the combined effect of double layer charge storage mechanism of the CNTs and the pseudocapacitive nature of the manganese oxides. In this talk, some basics of supercapacitor charge storage mechanism and how the physical properties of the substrate such as microstructure, surface area, and pore size affected the nature of deposited MnO2 and the corresponding device performance will be presented.

To cite this abstract, use the following reference: https://anpaglobal.org/conference/2023/ANPA2023-N0005