Cited by 253MXene and MAX Phase MaterialsSupercapacitor Materials and FabricationElectrocatalysts for Energy Conversion

Synthesis of Ultrathin MnO 2 Nanowire-Intercalated 2D-MXenes for High-Performance Hybrid Supercapacitors

Mahmood, Majid, Rasheed, Aamir, Ayman, Imtisal, Rasheed, Tabinda, Munir, Sana, Ajmal, Sara, Agboola, Philips O., Warsi, Muhammad Farooq +1 more·2021·Energy & Fuels

Abstract

Recently, the MXene itself and its composites with various metal oxides have shown excellent electrochemical performance due to the presence of multiple oxidation states. However, the restacking of MXene layers and poor electrical conductivity of metal oxides are major bottlenecks in their effective electrochemical transport, when they are applied individually. Herein, we report a novel manganese oxide/MXene (MnO 2 /MXene) composite material to overcome these critical issues. Sub-50 nm-thick MnO 2 nanowires (NWRs) were introduced inside the MXene to effectively stop the restacking as well as to increase the surface area of the supercapacitor (SC) electrode material. The special control on the thickness of NWRs is not only providing an opportunity to adjust them inside the MXene layers but also giving a high surface area. Electrochemical studies suggested that the MnO 2 /MXene composite behaves as an excellent electrode material for hybrid SCs, as compared to individual MXene and MnO 2 . Maximum specific capacitance ( C sp ) of MXene, MnO 2 NWRs, and MnO 2 /MXene composite was observed to be about 527.8, 337.5, and 611.5 F/g, respectively. The calculated specific capacity of the MnO 2 /MXene composite was about 489.5 C/g at 1 A/g, which shows better performance as an electrode material for energy storage devices. The synthesized electrode material demonstrated excellent capacitance retention of about 96% up to 1000 cycles.

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Crossref · 10.1021/acs.energyfuels.0c03939

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Authors
Mahmood, M., Rasheed, A., Ayman, I., Rasheed, T., Munir, S., Ajmal, S., Agboola, P. O., Warsi, M. F., & Shahid, M.
Affiliations
  • Islamia University of Bahawalpur (PK)
  • King Saud University (SA)
  • University of Hafr Al-Batin (SA)
Corresponding author
  • Warsi, Muhammad Farooq
  • Shahid, Muhammad
Venue
Energy & Fuels
Published
2021-01-26
Volume
35
Issue
4
Pages
3469-3478
ISSN
  • 0887-0624 (ISSN-L)
  • 1520-5029
OpenAlex
W3122549511
Cited by
253
References
52
Citations by year
2026: 40 · 2025: 50 · 2024: 83 · 2023: 45 · 2022: 25 · 2021: 10
FWCI
12.38
Type
journal article
Language
en
Open access
closed
Locations
Energy & Fuels (publishedVersion)
Funders
  • Higher Education Commision, Pakistan (6276/Punjab/NRPU/R&D/HEC)
  • King Saud University (RSP 2020/163)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › MXene and MAX Phase Materials
  • Physical Sciences › Materials Science › Electronic, Optical and Magnetic Materials › Supercapacitor Materials and Fabrication
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
Keywords
MXene, MnO2 nanowires, hybrid supercapacitors, specific capacitance, cycling stability, electrode materials, energy storage, ultrathin nanowires

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