TU Darmstadt / ULB / TUbiblio

Structure and electrochemical properties of Na2±xV3P2O13 (x = 0 and 1): a promising cathode material for sodium-ion batteries

Reddy, M. Anji and Euchner, Holger and Witter, Raiker and Clemens, Oliver (2018):
Structure and electrochemical properties of Na2±xV3P2O13 (x = 0 and 1): a promising cathode material for sodium-ion batteries.
In: Journal of Materials Chemistry A, 6 (16), pp. 6947-6958. Royal Society of Chemistry, ISSN 2050-7488,
DOI: 10.1039/C8TA00588E,
[Article]

Abstract

Owing to the large abundance of sodium resources and its low cost, sodium-ion batteries (NIBs) are being considered as a promising, feasible alternative to lithium-ion batteries (LIBs), notably for stationary applications. Research activities on sodium-ion batteries are growing worldwide but do still require a great deal of basic and applied research. The design and synthesis of new cathode materials are of great interest to realize the structural requirements to build sustainable and safe NIBs. Herein, we report the synthesis, structure and electrochemical properties of sodium vanadium oxy-phosphate (NVOP), Na2±xV3P2O13 (x = 0 and 1), a stable host for the reversible insertion of sodium. Na3V3P2O13 delivers a reversible capacity of 132 mA h g−1 at an average potential of 2.7 V vs. Na/Na+, which amounts to a specific energy of 356 W h kg−1. Furthermore, NVOP compounds exhibit excellent cycling stability. Besides, NVOP shows a rich structural chemistry during the sodium insertion and deinsertion process. A reversible switching of V5+ and V4+ between two crystallographic sites during sodiation and desodiation reactions was observed, hitherto unknown in battery materials. Na2±xV3P2O13 (x = 0 and 1) compounds were characterized by various experimental tools to understand the structure and related properties. In addition, density functional theory (DFT) calculations were performed to complement experimental observations and to understand sodium diffusion behavior in Na2±xV3P2O13 (x = 0 and 1).

Item Type: Article
Erschienen: 2018
Creators: Reddy, M. Anji and Euchner, Holger and Witter, Raiker and Clemens, Oliver
Title: Structure and electrochemical properties of Na2±xV3P2O13 (x = 0 and 1): a promising cathode material for sodium-ion batteries
Language: English
Abstract:

Owing to the large abundance of sodium resources and its low cost, sodium-ion batteries (NIBs) are being considered as a promising, feasible alternative to lithium-ion batteries (LIBs), notably for stationary applications. Research activities on sodium-ion batteries are growing worldwide but do still require a great deal of basic and applied research. The design and synthesis of new cathode materials are of great interest to realize the structural requirements to build sustainable and safe NIBs. Herein, we report the synthesis, structure and electrochemical properties of sodium vanadium oxy-phosphate (NVOP), Na2±xV3P2O13 (x = 0 and 1), a stable host for the reversible insertion of sodium. Na3V3P2O13 delivers a reversible capacity of 132 mA h g−1 at an average potential of 2.7 V vs. Na/Na+, which amounts to a specific energy of 356 W h kg−1. Furthermore, NVOP compounds exhibit excellent cycling stability. Besides, NVOP shows a rich structural chemistry during the sodium insertion and deinsertion process. A reversible switching of V5+ and V4+ between two crystallographic sites during sodiation and desodiation reactions was observed, hitherto unknown in battery materials. Na2±xV3P2O13 (x = 0 and 1) compounds were characterized by various experimental tools to understand the structure and related properties. In addition, density functional theory (DFT) calculations were performed to complement experimental observations and to understand sodium diffusion behavior in Na2±xV3P2O13 (x = 0 and 1).

Journal or Publication Title: Journal of Materials Chemistry A
Journal volume: 6
Number: 16
Publisher: Royal Society of Chemistry
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
Date Deposited: 12 Dec 2018 08:21
DOI: 10.1039/C8TA00588E
Official URL: https://doi.org/10.1039/C8TA00588E
Funders: We are greatly thankful to Estonian Research Council, Tallinn University of Technology and the National Institute of Chemical Physics and Biophysics (KBFI), H. E. acknowledges the computer time supported by the state of Baden-W ̈ urttemberg through the bwHPC project and the German Research Foundation (DFG) through grant number INST 40/467-1 FUGG., O. C. acknowledges funding by DFG within CL551/2-1.
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details