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Induced Rate Performance Enhancement in Off-Stoichiometric Na V (PO ) with Potential Applicability as the Cathode for Sodium-Ion Batteries.

作者信息

Aragón María J, Lavela Pedro, Ortiz Gregorio F, Alcántara Ricardo, Tirado José L

机构信息

Departmento de Química Inorgánica e Ingeniería Química, Instituto Universitario de Química Fina y Nanoquímica, University of Córdoba, Marie Curie Building. Campus de Rabanales, 14071, Córdoba, Spain.

出版信息

Chemistry. 2017 May 29;23(30):7345-7352. doi: 10.1002/chem.201700716. Epub 2017 May 8.

DOI:10.1002/chem.201700716
PMID:28397973
Abstract

Off-stoichiometric Na V (PO ) samples have been prepared by a sol-gel route. X-ray diffraction and XPS revealed the flexibility of the NASICON framework to accommodate these deviations of the stoichiometry; at least for low x values. X-ray photoelectron spectra evidenced the presence of Na P O impurities. The synergic combination of the structural deviations and the presence of Na P O impurities induce a significant improvement of the electrochemical performance and cycling stability at high rates, as compared to the stoichiometric Na V (PO ) sample. The fast kinetic response provided by the induced off-stoichiometry involves a decrease of the cell resistance.

摘要

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引用本文的文献

1
Off-stoichiometric Na V (PO)/C nanocomposites as cathode materials for high-performance sodium-ion batteries prepared by high-energy ball milling.通过高能球磨制备的非化学计量比NaV(PO) /C纳米复合材料作为高性能钠离子电池的阴极材料。
RSC Adv. 2018 Jun 4;8(36):20319-20326. doi: 10.1039/c8ra02843e. eCollection 2018 May 30.