Journal article
MXene-Derived Bilayered Vanadium Oxides with Enhanced Stability in Li-Ion Batteries
ACS applied energy materials, v 3(11), pp 10892-10901
23 Nov 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Bilayered vanadium oxides (BVOs) are a high-capacity intercalation host with affinity for various ions in energy storage systems. However, the electrochemical stability of BVOs upon extended galvanostatic cycling, especially at high rates, is lackluster. In this study, we demonstrate a transformative synthesis of chemically preintercalated BVOs with unique two-dimensional (2D) morphology and improved electrochemical stability by oxidation of V2CT x MXenes in hydrogen peroxide in the presence of alkali and alkaline-earth metal chlorides. The structure and composition of V2CT x -derived δ-M x V2O5·nH2O (M = Li, Na, K, Mg, and Ca) phases were examined by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy. The electrochemical properties of the V2CT x-derived δ-Li x V2O5·nH2O and δ-Mg x V2O5·nH2O electrodes in Li-ion cells were studied. Both materials exhibited high reversible specific capacity, improved cycling stability, and excellent rate capability. Notably, an enhanced tolerance to high current rates is observed with specific discharge capacity dropping from 200 to 130 mAh·g–1 and from 192 to 146 mAh·g–1 when the current rate was changed from C/10 to 5C in the case of V2CT x -derived δ-Li x V2O5·nH2O and δ-Mg x V2O5·nH2O electrodes, respectively. The improved capacity retention during electrochemical cycling may be attributed to the 2D morphology and improved crystallinity of the material enabled by the synthesis route.
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Details
- Title
- MXene-Derived Bilayered Vanadium Oxides with Enhanced Stability in Li-Ion Batteries
- Creators
- Phillip Ridley - Department of Materials Science and EngineeringCyra Gallano - Department of Materials Science and EngineeringRyan Andris - Department of Materials Science and EngineeringChristopher E Shuck - Drexel UniversityYury Gogotsi - Drexel UniversityEkaterina Pomerantseva - Department of Materials Science and Engineering
- Publication Details
- ACS applied energy materials, v 3(11), pp 10892-10901
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000595488500065
- Scopus ID
- 2-s2.0-85095998428
- Other Identifier
- 991014969766604721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Energy & Fuels
- Materials Science, Multidisciplinary