Journal article
Nanoscale Elastic Changes in 2D Ti3C2Tx (MXene) Pseudocapacitive Electrodes
Advanced energy materials, v 6(9), pp 1502290-n/a
11 May 2016
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Designing sustainable electrodes for next generation energy storage devices relies on the understanding of their fundamental properties at the nanoscale, including the comprehension of ions insertion into the electrode and their interactions with the active material. One consequence of ion storage is the change in the electrode volume resulting in mechanical strain and stress that can strongly affect the cycle life. Therefore, it is important to understand the changes of dimensions and mechanical properties occurring during electrochemical reactions. While the characterization of mechanical properties via macroscopic measurements is well documented, in situ characterization of their evolution has never been achieved at the nanoscale. It is reported here with in situ imaging, combined with density functional theory of the elastic changes of a 2D titanium carbide (Ti3C2Tx) based electrode in direction normal to the basal plane (electrode surface) during alkaline cation intercalation/extraction. 2D carbides, known as MXenes, are promising new materials for supercapacitors and various kinds of batteries, and understanding the coupling between their mechanical and electrochemical properties is therefore necessary. The results show a strong correlation between the cations content and the out‐of‐plane elastic modulus. This strategy enables identifying the preferential intercalation pathways within a single particle, which is important for understanding ionic transport in these materials.
In situ observations of Li‐ion intercalation into 2D MXene, through changes in mechanical properties measured using scanning probe microscopy, reveal high and slow ion diffusion paths.
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Details
- Title
- Nanoscale Elastic Changes in 2D Ti3C2Tx (MXene) Pseudocapacitive Electrodes
- Creators
- Jeremy Come - Oak Ridge National LaboratoryYu Xie - Oak Ridge National LaboratoryMichael Naguib - Oak Ridge National LaboratoryStephen Jesse - Oak Ridge National LaboratorySergei V Kalinin - Oak Ridge National LaboratoryYury Gogotsi - Drexel UniversityPaul R. C Kent - Oak Ridge National LaboratoryNina Balke - Oak Ridge National Laboratory
- Publication Details
- Advanced energy materials, v 6(9), pp 1502290-n/a
- Publisher
- Wiley
- Number of pages
- 9
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000379306400012
- Scopus ID
- 2-s2.0-84977830637
- Other Identifier
- 991014969869204721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter