Journal article
Pseudocapacitance of Vanadium Carbide MXenes in Basic and Acidic Aqueous Electrolytes
ACS energy letters, v 7(11), pp 3864-3870
11 Nov 2022
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Pseudocapacitive charge storage with Ti3C2T x in protic electrolytes has received significant attention. However, other MXene compositions have received less attention so far. Additionally, pseudocapacitance of MXenes has only been reported in acidic electrolytes. Herein, we report on the pseudocapacitance of two vanadium carbide MXenes (V2CT x and V4C3T x ) in various basic electrolytes and sulfuric acid, showing distinct redox couples in their cyclic voltammograms. Freestanding V2CT x film electrodes could deliver gravimetric capacitances above 250 F g–1 in different basic electrolytes with the highest capacitance of 386 F g–1 in 1 M LiOH at 2 mV s–1. Moreover, the cycle life performance showed an increasing capacitance over thousands of cycles (121% of initial capacitance after 60,000 cycles at 10 A g–1 in 6 M KOH). Both materials also exhibit higher capacitances than Ti3C2T x in 3 M sulfuric acid, with 475 and 284 F g–1 for V2CT x and V4C3T x , respectively.
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Details
- Title
- Pseudocapacitance of Vanadium Carbide MXenes in Basic and Acidic Aqueous Electrolytes
- Creators
- Teng Zhang - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania19104, United StatesKyle Matthews - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania19104, United StatesArmin VahidMohammadi - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania19104, United StatesMeikang Han - Drexel UniversityYury Gogotsi - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania19104, United States
- Publication Details
- ACS energy letters, v 7(11), pp 3864-3870
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000898479200001
- Scopus ID
- 2-s2.0-85140289117
- Other Identifier
- 991019291687504721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology