Exploring redox activity in a LiCoPO4–LiCo2P3O10 tailored positive electrode for 5 V lithium ion batteries: rigid band behavior of the electronic structure and stability of the delithiated phase

Gennady Cherkashinin; Mikhail V. Lebedev; Sankaramangalam U. Sharath; Andreas Hajduk; Silvia Nappini; Elena Magnano

doi:10.1039/C7TA11161D

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Exploring redox activity in a LiCoPO₄–LiCo₂P₃O₁₀ tailored positive electrode for 5 V lithium ion batteries: rigid band behavior of the electronic structure and stability of the delithiated phase†

Gennady Cherkashinin,

*^a Mikhail V. Lebedev,^b Sankaramangalam U. Sharath,^a Andreas Hajduk,^a Silvia Nappini

^c and Elena Magnano^cd

Author affiliations

* Corresponding authors

^a Institute of Materials Science, Technische Universität Darmstadt, Otto-Berndt str. 3, D-64287 Darmstadt, Germany
E-mail: cherk@surface.tu-darmstadt.de

^b Ioffe Institute, Politekhnicheskaya 26, St. Petersburg, Russia

^c IOM CNR Laboratorio TASC, Strada Statale 14, km. 163,5 in Area Science Park, 34149 Basovizza, Trieste, Italy

^d Department of Physics, University of Johannesburg, PO Box 524, Auckland Park, 2006, Johannesburg, South Africa

Abstract

The stability of the novel highly electronically conductive LiCoPO₄–LiCo₂P₃O₁₀ tailored polyphosphate is studied under electrochemical delithiation using quasi in situ depth-resolved synchrotron photoelectron spectroscopy, X-ray absorption spectroscopy and X-ray diffraction. The cathode material exhibits a rigid band behavior of the electronic structure and is stable in its fully delithiated state without amorphization in air.

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Article information

DOI: https://doi.org/10.1039/C7TA11161D
Article type: Communication
Submitted: 21 Dec 2017
Accepted: 21 Feb 2018
First published: 21 Feb 2018

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J. Mater. Chem. A, 2018,6, 4966-4970

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Exploring redox activity in a LiCoPO₄–LiCo₂P₃O₁₀ tailored positive electrode for 5 V lithium ion batteries: rigid band behavior of the electronic structure and stability of the delithiated phase

G. Cherkashinin, M. V. Lebedev, S. U. Sharath, A. Hajduk, S. Nappini and E. Magnano, J. Mater. Chem. A, 2018, 6, 4966 DOI: 10.1039/C7TA11161D

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Journal of Materials Chemistry A