Selectively designed hierarchical copper-cobalt oxysulfide nanoarchitectures for high-rate hybrid supercapacitors
- Authors
- Pallavolu, Mohan Reddy; Goli, Hemachandra Rao; Kumar, Yedluri Anil; Naushad, Mu.; Sambasivam, Sangaraju; Sreedhar, Adem
- Issue Date
- Dec-2022
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Ternary transition metal oxysulfides; Nanoflowers; Electrochemical activity; Hybrid supercapacitors; Energy density
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.926
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 926
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/86004
- DOI
- 10.1016/j.jallcom.2022.166814
- ISSN
- 0925-8388
- Abstract
- Rational design of metal oxide-sulfide-based composite electrode materials with multi-functional nanoarchitectures, high electrochemical conductivity, and superior redox activity have attracted extensive attention in high-rate hybrid supercapacitors. Herein, the hierarchical binder-free copper-cobalt oxysulfide (Cu0.33Co0.67OxSy) nanoarchitectures with flower-like nanosheets and nanoplates are facilely synthesized on Ni-foam for hybrid supercapacitors using a simple and low-cost wet chemical method. The Cu0.33Co0.67OxSy-NFs demonstrated a high specific capacity of 193 mAh/cm(2) (443.9 mu Ah/cm(2)) at current density of 3 mA cm-(2), with excellent cycling performance of 95 % even after 3000 charge-discharge cycles. In addition, an aqueous hybrid device was assembled using prepared Cu0.33Co0.67OxSy-NFs as positive and porous carbon as negative electrode, which demonstrated benchmark for energy storage properties. Specifically, the assembled device exhibited a high energy density of 0.33 mWh/cm(2) and a power density of 2.1 mW/cm(2) with high capacity retention (91 % after 5000 cycles at 20 mA cm-(2)). In view of practical applicability, the assembled hybrid devices can be able to power up a small wind fan for a long duration. The cost-effective single-step approach in designing high-performance cathode materials in this study provide a strategy for the design and manufacture of other ternary metal oxysulfides for high-performance energy storage devices. (C) 2022 Elsevier B.V. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - ETC > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/86004)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.