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Journal article
Revealing the Pseudo-Intercalation Charge Storage Mechanism of MXenes in Acidic Electrolyte
Advanced functional materials, v 29(29), pp 1-6
Jul 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Since the discovery of Ti3C2Tx in 2011, the family of two-dimensional transition metal carbides, carbonitrides, and nitrides (collectively known as MXenes) has quickly attracted the attention of those developing energy storage applications such as electrodes for supercapacitors with acidic aqueous electrolytes. The excellent performance of these MXenes is attributed to a pseudocapacitive energy storage mechanism, based on the non-rectangular shape of cyclic voltammetry curves and changes in the titanium oxidation state detected by in situ X-ray absorption spectroscopy. However, the pseudocapacitive mechanism is not well understood and no dimensional changes due to proton insertion have been reported. In this work, in situ X-ray diffraction and density functional theory are used to investigate the charge storage mechanism of Ti3C2Tx in 1 m H2SO4. Results reveal that a 0.5 angstrom expansion and shrinkage of the c-lattice parameter of Ti3C2Tx occur during cycling in a 0.9 V voltage window, showing that the charge storage mechanism is intercalation pseudocapacitance with implication for MXene use in energy storage and electrochemical actuators.
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Details
- Title
- Revealing the Pseudo-Intercalation Charge Storage Mechanism of MXenes in Acidic Electrolyte
- Creators
- Xinpeng Mu - Jilin UniversityDashuai Wang - Jilin UniversityFei Du - Jilin UniversityGang Chen - Jilin UniversityChunzhong Wang - Jilin UniversityYingjin Wei - Jilin UniversityYury Gogotsi - Drexel University, Materials Science and EngineeringYu Gao - Jilin UniversityYohan Dall'Agnese - Jilin University
- Publication Details
- Advanced functional materials, v 29(29), pp 1-6
- Publisher
- Wiley
- Number of pages
- 6
- Grant note
- SXGJSF2017-3 / Jilin Province/Jilin University Co-Construction Project-Funds for New Materials 20180101199JC; 20180101204JC / Science & Technology Department of Jilin Province
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000478629500010
- Scopus ID
- 2-s2.0-85069904962
- Other Identifier
- 991014878339004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter