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Bilayered Potassium Vanadate K0.5 V2 O5 as Superior Cathode Material for Na-Ion Batteries.
ChemSusChem. 2019 Dec 06; 12(23):5192-5198.C

Abstract

A bilayered potassium vanadate K0.5 V2 O5 (KVO) is synthesized by a fast and facile synthesis route and evaluated as a positive electrode material for Na-ion batteries. Half the potassium ions can be topotactically extracted from KVO through the first charge, allowing 1.14 Na+ ions to be reversibly inserted. A good rate capability is also highlighted, with 160 mAh g-1 at C/10, 94 mAh g-1 at C/2, 73 mAh g-1 at 2C and excellent cycling stability with 152 mAh g-1 still available after 50 cycles at C/10. Ex situ X-ray diffraction reveals weak and reversible structural changes resulting in soft breathing of the KVO host lattice upon Na extraction-insertion cycles (ΔV/V≈3 %). A high structure stability upon cycling is also achieved, at both the long-range order and atomic scale probed by Raman spectroscopy. This remarkable behavior is ascribed to the large interlayer spacing of KVO (≈9.5 Å) stabilized by pillar K ions, which is able to accommodate Na ions without any critical change to the structure. Kinetics measurements reveal a good Na diffusivity that is hardly affected upon discharge. This study opens an avenue for further exploration of potassium vanadates and other bronzes in the field of Na-ion batteries.

Authors+Show Affiliations

Institut de Chimie et des Matériaux Paris Est (ICMPE), GESMAT, UMR 7182 CNRS-Université Paris Est Créteil, 2 rue Henri Dunant, 94320, Thiais, France.Institut de Chimie et des Matériaux Paris Est (ICMPE), GESMAT, UMR 7182 CNRS-Université Paris Est Créteil, 2 rue Henri Dunant, 94320, Thiais, France.Institut de Chimie et des Matériaux Paris Est (ICMPE), GESMAT, UMR 7182 CNRS-Université Paris Est Créteil, 2 rue Henri Dunant, 94320, Thiais, France. School of Engineering, National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana, 010000, Kazakhstan.Institut de Chimie et des Matériaux Paris Est (ICMPE), GESMAT, UMR 7182 CNRS-Université Paris Est Créteil, 2 rue Henri Dunant, 94320, Thiais, France. Dept Chimie, Université d'Evry Val d'Essonne, Bd F. Mitterrand, 91000, Evry, France.Institut de Chimie et des Matériaux Paris Est (ICMPE), GESMAT, UMR 7182 CNRS-Université Paris Est Créteil, 2 rue Henri Dunant, 94320, Thiais, France.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31595706

Citation

Baddour-Hadjean, Rita, et al. "Bilayered Potassium Vanadate K0.5 V2 O5 as Superior Cathode Material for Na-Ion Batteries." ChemSusChem, vol. 12, no. 23, 2019, pp. 5192-5198.
Baddour-Hadjean R, Thanh Nguyen Huynh L, Batyrbekuly D, et al. Bilayered Potassium Vanadate K0.5 V2 O5 as Superior Cathode Material for Na-Ion Batteries. ChemSusChem. 2019;12(23):5192-5198.
Baddour-Hadjean, R., Thanh Nguyen Huynh, L., Batyrbekuly, D., Bach, S., & Pereira-Ramos, J. P. (2019). Bilayered Potassium Vanadate K0.5 V2 O5 as Superior Cathode Material for Na-Ion Batteries. ChemSusChem, 12(23), 5192-5198. https://doi.org/10.1002/cssc.201902093
Baddour-Hadjean R, et al. Bilayered Potassium Vanadate K0.5 V2 O5 as Superior Cathode Material for Na-Ion Batteries. ChemSusChem. 2019 Dec 6;12(23):5192-5198. PubMed PMID: 31595706.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Bilayered Potassium Vanadate K0.5 V2 O5 as Superior Cathode Material for Na-Ion Batteries. AU - Baddour-Hadjean,Rita, AU - Thanh Nguyen Huynh,Le, AU - Batyrbekuly,Daureen, AU - Bach,Stéphane, AU - Pereira-Ramos,Jean-Pierre, Y1 - 2019/10/30/ PY - 2019/07/31/received PY - 2019/10/01/revised PY - 2019/10/9/pubmed PY - 2019/10/9/medline PY - 2019/10/10/entrez KW - K0.5V2O5 KW - Na-ion battery KW - bilayer KW - cathode material KW - layered potassium vanadate SP - 5192 EP - 5198 JF - ChemSusChem JO - ChemSusChem VL - 12 IS - 23 N2 - A bilayered potassium vanadate K0.5 V2 O5 (KVO) is synthesized by a fast and facile synthesis route and evaluated as a positive electrode material for Na-ion batteries. Half the potassium ions can be topotactically extracted from KVO through the first charge, allowing 1.14 Na+ ions to be reversibly inserted. A good rate capability is also highlighted, with 160 mAh g-1 at C/10, 94 mAh g-1 at C/2, 73 mAh g-1 at 2C and excellent cycling stability with 152 mAh g-1 still available after 50 cycles at C/10. Ex situ X-ray diffraction reveals weak and reversible structural changes resulting in soft breathing of the KVO host lattice upon Na extraction-insertion cycles (ΔV/V≈3 %). A high structure stability upon cycling is also achieved, at both the long-range order and atomic scale probed by Raman spectroscopy. This remarkable behavior is ascribed to the large interlayer spacing of KVO (≈9.5 Å) stabilized by pillar K ions, which is able to accommodate Na ions without any critical change to the structure. Kinetics measurements reveal a good Na diffusivity that is hardly affected upon discharge. This study opens an avenue for further exploration of potassium vanadates and other bronzes in the field of Na-ion batteries. SN - 1864-564X UR - https://www.unboundmedicine.com/medline/citation/31595706/Bilayered_Potassium_Vanadate_K0_5_V2_O5_as_Superior_Cathode_Material_for_Na_Ion_Batteries_ L2 - https://doi.org/10.1002/cssc.201902093 DB - PRIME DP - Unbound Medicine ER -
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