Conference proceeding
The Ion Dependent Change in the Mechanism of Charge Storage of Chemically Preintercalated Bilayered Vanadium Oxide Electrodes
LOW-DIMENSIONAL MATERIALS AND DEVICES 2017, v 10349, pp 103490H-103490H-9
01 Jan 2017
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Chemical pre-intercalation is a soft chemistry synthesis approach that allows for the insertion of inorganic ions into the interlayer space of layered battery electrode materials prior to electrochemical cycling. Previously, we have demonstrated that chemical pre-intercalation of Na+ ions into the structure of bilayered vanadium oxide (delta-V2O5) results in record high initial capacities above 350 mAh g(-1) in Na-ion cells. This performance is attributed to the expanded interlayer spacing and predefined diffusion pathways achieved by the insertion of charge-carrying ions. However, the effect of chemical pre-intercalation of delta-V2O5 has not been studied for other ion-based systems beyond sodium. In this work, we report the effect of the chemically preintercalated alkali ion size on the mechanism of charge storage of delta-MxV(2)O(5) (M = Li, Na, K) in Li-ion, Na-ion, and K-ion batteries, respectively. The interlayer spacing of the delta-MxV(2)O(5) varied depending on inserted ion, with 11.1 A achieved for Li-preintercalated delta-V2O5, 11.4 A for Na-preintercalated dV(2)O(5), and 9.6 A for K-preintercalated delta-V2O5. Electrochemical performance of each material has been studied in its respective ion-based system (delta-LixV(2)O(5) in Li-ion cells, delta-NaxV(2)O(5) in Na-ion cells, and delta-KxV(2)O(5) in K-ion cells). All materials demonstrated high initial capacities above 200 mAh g(-1). However, the mechanism of charge storage differed depending on the charge-carrying ion, with Li-ion cells demonstrating predominantly pseudocapacitive behavior and Naion and K-ion cells demonstrating a significant portion of capacity from diffusion-limited intercalation processes. In this study, the combination of increased ionic radii of the charge-carrying ions and decreased synthesized interlayer spacing of the bilayered vanadium oxide phase correlates to an increase in the portion of capacity attributed diffusion-limited charge-storage processes.
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Details
- Title
- The Ion Dependent Change in the Mechanism of Charge Storage of Chemically Preintercalated Bilayered Vanadium Oxide Electrodes
- Creators
- Mallory Clites - Drexel Univ, Dept Mat Sci & Engn, Philadelphia, PA 19104 USAEkaterina Pomerantseva - Drexel University
- Contributors
- N P Kobayashi (Editor)A A Talin (Editor)M S Islam (Editor)A V Davydov (Editor)
- Publication Details
- LOW-DIMENSIONAL MATERIALS AND DEVICES 2017, v 10349, pp 103490H-103490H-9
- Series
- Proceedings of SPIE
- Publisher
- Spie-Int Soc Optical Engineering
- Number of pages
- 9
- Grant note
- DMR-1609272 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000424005400003
- Scopus ID
- 2-s2.0-85033731557
- Other Identifier
- 991019168913304721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Materials Science, Multidisciplinary
- Optics