Journal article
Chemically Preintercalated Bilayered KxV2O5 center dot nH(2)O Nanobelts as a High-Performing Cathode Material for K-Ion Batteries
ACS energy letters, v 3(3), pp 562-567
01 Mar 2018
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Tailoring the structure of the electrode material through chemical insertion of charge-carrying ions emerged as an efficient approach leading to enhanced performance of energy storage devices. Here, we for the first time report the effect of chemically preintercalated K+ ions on electrochemical charge storage properties of bilayered vanadium oxide (delta-V2O5) as a cathode in nonaqueous K-ion batteries, a low-cost alternative to Li-ion batteries, which is attractive for large-scale energy storage. delta-K0.42V2O5 center dot 0.25H(2)O with expanded interlayer spacing of 9.65 angstrom exhibited record high initial discharge capacity of 268 mAh.g(-1) at a current rate of C/50 and 226 mAh.g(-1) at a current rate of C/15. K-preintercalated bilayered vanadium oxide showed capacity retention of 74% after 50 cycles at a constant current of C/15 and 58% capacity retention when the current rate was increased from C/15 to 1C. Analysis of the mechanism of charge storage revealed that diffusion-controlled intercalation dominates over nonfaradaic capacitive contribution. High electrochemical performance of delta-K0.42V2O5 center dot 0.25H(2)O is attributed to the facilitated diffusion of electrochemically cycled K+ ions through well-defined intercalation sites, formed by chemically preintercalated K+ ions.
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Details
- Title
- Chemically Preintercalated Bilayered KxV2O5 center dot nH(2)O Nanobelts as a High-Performing Cathode Material for K-Ion Batteries
- Creators
- Mallory Clites - Drexel UniversityJames L. Hart - Drexel UniversityMitra L. Taheri - Drexel UniversityEkaterina Pomerantseva - Drexel University
- Publication Details
- ACS energy letters, v 3(3), pp 562-567
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 11
- Grant note
- 1609272 / Division Of Materials Research; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) DMR-1609272 / National Science Foundation; National Science Foundation (NSF) 1429661 / National Science Foundation's Major Research Instrumentation Program; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000427444300011
- Scopus ID
- 2-s2.0-85043486533
- Other Identifier
- 991019168211404721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Physical
- Electrochemistry
- Energy & Fuels
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology