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Heterostructured Titanium Oxynitride-Manganese Cobalt Oxide Nanorods as High-Performance Electrode Materials for Supercapacitor Devices

Title
Heterostructured Titanium Oxynitride-Manganese Cobalt Oxide Nanorods as High-Performance Electrode Materials for Supercapacitor Devices
Authors
Samdani, Jitendra ShashikantKang, Tong-HyunLee, Byong-JuneJang, Yun HeeYu, Jong-SungShanmugam, Sangaraju
DGIST Authors
Jang, Yun HeeYu, Jong-SungShanmugam, Sangaraju
Issue Date
2020-12
Citation
ACS Applied Materials and Interfaces, 12(49), 54524-54536
Type
Article
Article Type
Article
Author Keywords
titanium oxynitrideorganic electrolyteTiON-MnCo2O4heterostructuresymmetric supercapacitorcoin cell supercapacitor
Keywords
FACILE SYNTHESISCARBONNANOWIRESMNCO2O4NANOFIBERSSHEETSARCHITECTUREASYMMETRIC SUPERCAPACITORSHYDROTHERMAL SYNTHESISMETAL OXYNITRIDES
ISSN
1944-8244
Abstract
Metal oxynitrides have been considered recently as emerging electrode materials for supercapacitors. Herein, we converted titanate nanotubes into a series of titanium oxynitride (TiON) nanorods at nitridation temperatures of 800, 900, and 1000 ºC in ammonia gas and tested them as supercapacitor electrodes. The TiON-800, TiON-900, and TiON-1000 showed a capacity of 60, 140, and 71 F g-1, respectively, at a current density of 1 A g-1. However, because of the TiON’s low capacity, a heterostructure (TiON-900/MnCo2O4) was designed based on the optimized TiON with MnCo2O4 (MCO). The heterostructure TiON-900-MCO and MCO electrode materials showed specific capacities of 515 F g-1 and 381 F g-1, respectively, at a current density of 1 A g-1. The cycling stability retention of TiON-900 and MCO was 75% and 68%, respectively, and moreover, the heterostructure of TiON-900-MCO reached 78% at a current density of 5 A g-1 over 5000 cycles. The increased capacity and sustained cycling stability retention is attributable to the synergistic effect of TiON-900 and MCO. A coin cell (CC) type symmetric supercapacitor prototype of TiON-900-MCO was fabricated and tested in the voltage range of 0.0–2.0 V in 1 M LiClO4 in propylene carbonate/dimethyl carbonate electrolyte, and a 79% cycling retention capacity of TiON-900-MCO-CC was achieved over 10000 cycles at a current density of 250 mA g-1. We demonstrated a prototypical single cell of TiON-900-MCO-CC as a sustained energy output by powering a red-light emitting diode that indicated TiON-900-MCo electrode materials’ potential application in commercial supercapacitor devices.
URI
http://hdl.handle.net/20.500.11750/12582
DOI
10.1021/acsami.0c13803
Publisher
American Chemical Society
Related Researcher
  • Author Shanmugam, Sangaraju Advanced Energy Materials Laboratory
  • Research Interests Electrocatalysts for fuel cells; water splitting; metal-air batteries; Polymer electrolyte membranes for fuel cells; flow batteries; Hydrogen generation and utilization
Files:
There are no files associated with this item.
Collection:
Department of Energy Science and EngineeringCMMM Lab(Curious Minds Molecular Modeling Laboratory)1. Journal Articles
Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles
Department of Energy Science and EngineeringAdvanced Energy Materials Laboratory1. Journal Articles


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