Effect of surface Li3PO4 coating on LiNi 0.5Mn1.5O4 epitaxial thin film electrodes synthesized by pulsed laser deposition

Hiroaki Konishi; Kota Suzuki; Sou Taminato; Kyungsu Kim; Yueming Zheng; Sangryun Kim; Jaemin Lim; Masaaki Hirayama; Jin Young Son; Yitao Cui; Ryoji Kanno

doi:10.1016/j.jpowsour.2014.05.052

Effect of surface Li₃PO₄ coating on LiNi _0.5Mn_1.5O₄ epitaxial thin film electrodes synthesized by pulsed laser deposition

Hiroaki Konishi, Kota Suzuki, Sou Taminato, Kyungsu Kim, Yueming Zheng, Sangryun Kim, Jaemin Lim, Masaaki Hirayama, Jin Young Son, Yitao Cui, Ryoji Kanno

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

The effect of Li₃PO₄ coating was investigated for LiNi_0.5Mn_1.5O₄ epitaxial thin film electrodes synthesized on SrTiO₃ substrates by pulsed laser deposition (PLD). Amorphous Li₃PO₄ with a thickness of 1-4 nm was coated at room temperature onto 30 nm thick epitaxial LiNi_0.5Mn _1.5O₄ thin films with (111), (110) and (100) lattice orientations. Electrodes with the surface coating exhibit high charge-discharge capacities and small capacity degradation during cycling experiments in the high voltage region. X-ray absorption near edge structure (XANES) and hard X-ray photoelectron spectroscopy (HAXPES) analyses indicate a higher manganese valence for the electrode surface of the Li₃PO₄ stacked LiNi _0.5Mn_1.5O₄ film than that for the surface of a pristine LiNi_0.5Mn_1.5O₄ film. Thus, surface coating affects the manganese valence near the electrode surface and improves the cycling characteristics.

Original language	English
Pages (from-to)	293-298
Number of pages	6
Journal	Journal of Power Sources
Volume	269
DOIs	https://doi.org/10.1016/j.jpowsour.2014.05.052
Publication status	Published - 2014 Dec 10
Externally published	Yes

Keywords

Epitaxial thin film
High voltage positive electrode
Lithium ion battery
Spinel
Surface coating

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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Effect of surface Li₃PO₄ coating on LiNi _0.5Mn_1.5O₄ epitaxial thin film electrodes synthesized by pulsed laser deposition. / Konishi, Hiroaki; Suzuki, Kota; Taminato, Sou; Kim, Kyungsu; Zheng, Yueming; Kim, Sangryun; Lim, Jaemin; Hirayama, Masaaki; Son, Jin Young; Cui, Yitao; Kanno, Ryoji.

In: Journal of Power Sources, Vol. 269, 10.12.2014, p. 293-298.

Research output: Contribution to journal › Article › peer-review

@article{07072c349d4440808432e59c670891dc,

title = "Effect of surface Li3PO4 coating on LiNi 0.5Mn1.5O4 epitaxial thin film electrodes synthesized by pulsed laser deposition",

abstract = "The effect of Li3PO4 coating was investigated for LiNi0.5Mn1.5O4 epitaxial thin film electrodes synthesized on SrTiO3 substrates by pulsed laser deposition (PLD). Amorphous Li3PO4 with a thickness of 1-4 nm was coated at room temperature onto 30 nm thick epitaxial LiNi0.5Mn 1.5O4 thin films with (111), (110) and (100) lattice orientations. Electrodes with the surface coating exhibit high charge-discharge capacities and small capacity degradation during cycling experiments in the high voltage region. X-ray absorption near edge structure (XANES) and hard X-ray photoelectron spectroscopy (HAXPES) analyses indicate a higher manganese valence for the electrode surface of the Li3PO4 stacked LiNi 0.5Mn1.5O4 film than that for the surface of a pristine LiNi0.5Mn1.5O4 film. Thus, surface coating affects the manganese valence near the electrode surface and improves the cycling characteristics.",

keywords = "Epitaxial thin film, High voltage positive electrode, Lithium ion battery, Spinel, Surface coating",

author = "Hiroaki Konishi and Kota Suzuki and Sou Taminato and Kyungsu Kim and Yueming Zheng and Sangryun Kim and Jaemin Lim and Masaaki Hirayama and Son, {Jin Young} and Yitao Cui and Ryoji Kanno",

note = "Funding Information: The synchrotron radiation experiments were performed as projects approved by the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2012B1679 and 2012B1741). This study was partly supported by a Grant-in-Aid for Scientific Research on Innovative Areas “Exploration of nanostructure–property relationships for materials innovation” from the Japan Society for the Promotion of Science ( No. 25106009 ). Copyright: Copyright 2014 Elsevier B.V., All rights reserved.",

year = "2014",

month = dec,

day = "10",

doi = "10.1016/j.jpowsour.2014.05.052",

language = "English",

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T1 - Effect of surface Li3PO4 coating on LiNi 0.5Mn1.5O4 epitaxial thin film electrodes synthesized by pulsed laser deposition

AU - Konishi, Hiroaki

AU - Suzuki, Kota

AU - Taminato, Sou

AU - Kim, Kyungsu

AU - Zheng, Yueming

AU - Kim, Sangryun

AU - Lim, Jaemin

AU - Hirayama, Masaaki

AU - Son, Jin Young

AU - Cui, Yitao

AU - Kanno, Ryoji

N1 - Funding Information: The synchrotron radiation experiments were performed as projects approved by the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal Nos. 2012B1679 and 2012B1741). This study was partly supported by a Grant-in-Aid for Scientific Research on Innovative Areas “Exploration of nanostructure–property relationships for materials innovation” from the Japan Society for the Promotion of Science ( No. 25106009 ). Copyright: Copyright 2014 Elsevier B.V., All rights reserved.

PY - 2014/12/10

Y1 - 2014/12/10

N2 - The effect of Li3PO4 coating was investigated for LiNi0.5Mn1.5O4 epitaxial thin film electrodes synthesized on SrTiO3 substrates by pulsed laser deposition (PLD). Amorphous Li3PO4 with a thickness of 1-4 nm was coated at room temperature onto 30 nm thick epitaxial LiNi0.5Mn 1.5O4 thin films with (111), (110) and (100) lattice orientations. Electrodes with the surface coating exhibit high charge-discharge capacities and small capacity degradation during cycling experiments in the high voltage region. X-ray absorption near edge structure (XANES) and hard X-ray photoelectron spectroscopy (HAXPES) analyses indicate a higher manganese valence for the electrode surface of the Li3PO4 stacked LiNi 0.5Mn1.5O4 film than that for the surface of a pristine LiNi0.5Mn1.5O4 film. Thus, surface coating affects the manganese valence near the electrode surface and improves the cycling characteristics.

AB - The effect of Li3PO4 coating was investigated for LiNi0.5Mn1.5O4 epitaxial thin film electrodes synthesized on SrTiO3 substrates by pulsed laser deposition (PLD). Amorphous Li3PO4 with a thickness of 1-4 nm was coated at room temperature onto 30 nm thick epitaxial LiNi0.5Mn 1.5O4 thin films with (111), (110) and (100) lattice orientations. Electrodes with the surface coating exhibit high charge-discharge capacities and small capacity degradation during cycling experiments in the high voltage region. X-ray absorption near edge structure (XANES) and hard X-ray photoelectron spectroscopy (HAXPES) analyses indicate a higher manganese valence for the electrode surface of the Li3PO4 stacked LiNi 0.5Mn1.5O4 film than that for the surface of a pristine LiNi0.5Mn1.5O4 film. Thus, surface coating affects the manganese valence near the electrode surface and improves the cycling characteristics.

KW - Epitaxial thin film

KW - High voltage positive electrode

KW - Lithium ion battery

KW - Spinel

KW - Surface coating

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