Two-Dimensional Core-Shell Structure of Cobalt-Doped@MnO2 Nanosheets Grown on Nickel Foam as a Binder-Free Battery-Type Electrode for Supercapacitor Applicationopen access
- Authors
- Moniruzzaman, Md; Kumar, Yedluri Anil; Pallavolu, Mohan Reddy; Arbi, Hammad Mueen; Alzahmi, Salem; Obaidat, Ihab M.
- Issue Date
- Sep-2022
- Publisher
- MDPI
- Keywords
- cobalt-doped manganese oxides; electrode; supercapacitors; energy storage; hydrothermal method
- Citation
- NANOMATERIALS, v.12, no.18
- Journal Title
- NANOMATERIALS
- Volume
- 12
- Number
- 18
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/85884
- DOI
- 10.3390/nano12183187
- ISSN
- 2079-4991
- Abstract
- Herein, we present an interfacial engineering strategy to construct an efficient hydrothermal approach by in situ growing cobalt-doped@MnO2 nanocomposite on highly conductive nickel foam (Ni foam) for supercapacitors (SCs). The remarkably high specific surface area of Co dopant provides a larger contacting area for MnO2. In the meantime, the excellent retentions of the hierarchical phase-based pore architecture of the cobalt-doped surface could beneficially condense the electron transportation pathways. In addition, the nickel foam (Ni foam) nanosheets provide charge-transport channels that lead to the outstanding improved electrochemical activities of cobalt-doped@MnO2. The unique cobalt-doped@MnO2 nanocomposite electrode facilitates stable electrochemical architecture, multi-active electrochemical sites, and rapid electro-transports channels; which act as a key factor in enhancing the specific capacitances, stability, and rate capacities. As a result, the cobalt-doped@MnO2 nanocomposite electrode delivered superior electrochemical activities with a specific capacitance of 337.8 F g(-1) at 0.5 A g(-1); this is greater than pristine MnO2 (277.9 F g(-1)). The results demonstrate a worthy approach for the designing of high-performance SCs by the grouping of the nanostructured dopant material and metal oxides.
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