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Journal article
Tracking ion intercalation into layered Ti3C2 MXene films across length scales (Electronic supplementary information (ESI) available. See DOI: 10.1039/d0ee01580f)
Energy & environmental science, v 13(8), pp 2549-2558
01 Jan 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Enhancing the energy stored and power delivered by layered materials relies strongly on improved understanding of the intricate interplay of electrolyte ions, solvents, and electrode interactions as well as the role of confinement. Here we report a highly integrated study with multiscale theory/modelling and experiments to track the intercalation of aqueous Li+, Na+, K+, Cs+, and Mg2+ ions into Ti3C2 MXene. The integrated analysis of experiments assisted by theory/modelling allows for a deep understanding of energy storage processes highlighting the importance of the dynamics of cations, their positionings between MXene sheets, their effects on mechanical properties and capacitive energy storage. Computational simulations and operando calorimetry measurements prove the processes involving cation dehydration and H+ rehydration, showing a good correlation for heat variations between experiments and theory. Operando liquid AFM mapped energy dissipation of ions appears non-uniformly across the MXene surface, indicating heterogeneities of ions inside the MXene and confirming partially the ion behaviour obtained in theory. We directly demonstrate that the average distance between the cation and MXene surface follows a modified two-sided Helmholtz model when plotted versus the open circuit potential capacitance, revealing a different electrical double layer mechanism in confinement. This new fundamental understanding lays the foundation for improved functional devices utilizing electrodes and membranes made of two-dimensional materials.
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Details
- Title
- Tracking ion intercalation into layered Ti3C2 MXene films across length scales (Electronic supplementary information (ESI) available. See DOI: 10.1039/d0ee01580f)
- Creators
- Qiang GaoWeiwei SunPoorandokht Ilani-KashkouliAlexander TselevPaul R C KentNadine KabengiMichael NaguibMohamed AlhabebWan-Yu TsaiArthur P BaddorfJingsong HuangStephen JesseYury GogotsiNina Balke
- Publication Details
- Energy & environmental science, v 13(8), pp 2549-2558
- Publisher
- Royal Society of Chemistry; Cambridge
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000566904600018
- Scopus ID
- 2-s2.0-85089902022
- Other Identifier
- 991014970026004721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Energy & Fuels
- Engineering, Chemical
- Environmental Sciences