Journal article
Mxenes As High Capacity Electrodes Materials for Metal (Li, Na, K, Ca)-Ion Batteries
Meeting abstracts (Electrochemical Society), v MA2014-02(2), pp 101-101
05 Aug 2014
Abstract
Two-dimensional (2-D) materials are capable of handling high rates of charge in ion batteries since metal ions do not need to diffuse in a 3-D lattice structure. However graphene, which is the most well-studied 2-D material, is known to have no Li capacity. Here, adsorption of Li, as well as Na, K, and Ca on Ti
3
C
2
, one representative MXene, is predicted by first-principles density functional calculations. In our study, we observed that these alkali atoms exhibit different adsorption energies depending on the coverage. The adsorption energies of Na, K, and Ca decrease as coverage increases, while Li shows little sensitivity to variance in coverage. This observed relationship between adsorption energies and coverage of alkali ions on Ti
3
C
2
can be explained by their effective ionic radii. A larger effective ionic radius increases interaction between alkali atoms, thus lower coverage is obtained. Our calculated capacities for Li, Na, K, and Ca on Ti
3
C
2
are 447.8, 351.8, 191.9, and 320.0 mAh/g, respectively. Compared to materials currently used in high-rate Li and Na ion battery anodes, MXene shows promise in increasing overall battery performance.
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Details
- Title
- Mxenes As High Capacity Electrodes Materials for Metal (Li, Na, K, Ca)-Ion Batteries
- Creators
- Dequan Er - #N##N#aDept of Mat. Sci. and Eng., University of PennsylvaniaJunwen Li - #N##N#aDept of Mat. Sci. and Eng., University of PennsylvaniaMichael Naguib - Drexel UniversityYury Gogotsi - Drexel UniversityVivek B. Shenoy - University of Pennsylvania
- Publication Details
- Meeting abstracts (Electrochemical Society), v MA2014-02(2), pp 101-101
- Publisher
- Institute of Physics (IOP)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Other Identifier
- 991019186778204721