Journal article
Vanadium and Niobium MXenes-Bilayered V2 O5 Asymmetric Supercapacitors
Small methods, v 7(8), 2201551
18 Aug 2023
PMID: 36802207
Abstract
MXenes offer high metallic conductivity and redox capacitance that are attractive for high-power, high-energy storage devices. However, they operate limitedly under high anodic potentials due to irreversible oxidation. Pairing them with oxides to design asymmetric supercapacitors may expand the voltage window and increase the energy storage capabilities. Hydrated lithium preintercalated bilayered V2O5 ( δ-LixV2O5·nH2O) is attractive for aqueous energy storage due to its high Li capacity at high potentials; however, its poor cyclability remains a challenge. To overcome its limitations and achieve a wide voltage window and excellent cyclability, it is combined with V2C and Nb4C3 MXenes. Asymmetric supercapacitors employing lithium intercalated V2C (Li-V2C) or tetramethylammonium intercalated Nb4C3 (TMA-Nb4C3) MXenes as the negative electrode, and a δ-LixV2O5·nH2O composite with carbon nanotubes as the positive electrode in 5 m LiCl electrolyte operate over wide voltage windows of 2 and 1.6 V, respectively. The latter shows remarkably high cyclability—capacitance retention of ≈95% after 10 000 cycles. This work highlights the importance of selecting appropriate MXenes to achieve a wide voltage window and a long cycle life in combination with oxide anodes to demonstrate the potential of MXenes beyond Ti3C2 in energy storage.
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Details
- Title
- Vanadium and Niobium MXenes-Bilayered V2 O5 Asymmetric Supercapacitors
- Creators
- Mohit Saraf - Drexel UniversityTeng Zhang - Drexel UniversityTimofey Averianov - Drexel UniversityChristopher E Shuck - Drexel UniversityRobert W Lord - Drexel UniversityEkaterina Pomerantseva - Drexel UniversityYury Gogotsi - Drexel University
- Publication Details
- Small methods, v 7(8), 2201551
- Publisher
- Wiley
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000935039600001
- Scopus ID
- 2-s2.0-85148527070
- Other Identifier
- 991020122257704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology