High-capacity phase formation by surface modification of Li 3PO 4 on nanosized Li 2RuO 3 electrode for lithium batteries

Yueming Zheng; Sou Taminato; Youlong Xu; Kota Suzuki; Kyungsu Kim; Masaaki Hirayama; Ryoji Kanno

doi:10.1016/j.jpowsour.2012.02.044

High-capacity phase formation by surface modification of Li ₃PO ₄ on nanosized Li ₂RuO ₃ electrode for lithium batteries

Yueming Zheng
, Sou Taminato
, Youlong Xu
, Kota Suzuki
, Kyungsu Kim
, Masaaki Hirayama
, Ryoji Kanno

Faculty of Electronic and Information Engineering

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

14 Scopus citations

Abstract

Effects of modifying the surface of lithium excess layered rock-salt type electrodes by Li ₃PO ₄ is investigated using epitaxial Li ₂RuO ₃ model electrodes. A 3.6-nm-thick amorphous Li ₃PO ₄ layer is deposited on a 25.5-nm-thick Li ₂RuO ₃ film by pulsed laser deposition. X-ray absorption near edge structure reveals that the modified Li ₂RuO ₃ surface had different electronic states of Ru from the unmodified Li ₂RuO ₃ surface, indicating that Li ₃PO ₄ deposition changes the structure of the Li ₂RuO ₃ surface. Li ₃PO ₄-modified Li ₂RuO ₃ has a much higher first discharge capacity (296 mAh g ^-1) between 2.8 and 4.2 V than unmodified Li ₂RuO ₃ (190 mAh g ^-1). The modified and unmodified Li ₂RuO ₃ have irreversible capacities in the first charge/discharge process of 22 and 148 mAh g ^-1, respectively. The surface modification induced by Li ₃PO ₄ deposition enhances the structural stability of the Li ₂RuO ₃ surface during the initial charging process.

Original language	English
Pages (from-to)	447-451
Number of pages	5
Journal	Journal of Power Sources
Volume	208
DOIs	https://doi.org/10.1016/j.jpowsour.2012.02.044
State	Published - 15 Jun 2012

Keywords

Epitaxial film model electrodes
Lithium phosphate
Lithium ruthenium oxide
Surface structure

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2012.02.044

Cite this

@article{17a4c699b0ac4065b4dc995422752e76,

title = "High-capacity phase formation by surface modification of Li 3PO 4 on nanosized Li 2RuO 3 electrode for lithium batteries",

abstract = "Effects of modifying the surface of lithium excess layered rock-salt type electrodes by Li 3PO 4 is investigated using epitaxial Li 2RuO 3 model electrodes. A 3.6-nm-thick amorphous Li 3PO 4 layer is deposited on a 25.5-nm-thick Li 2RuO 3 film by pulsed laser deposition. X-ray absorption near edge structure reveals that the modified Li 2RuO 3 surface had different electronic states of Ru from the unmodified Li 2RuO 3 surface, indicating that Li 3PO 4 deposition changes the structure of the Li 2RuO 3 surface. Li 3PO 4-modified Li 2RuO 3 has a much higher first discharge capacity (296 mAh g -1) between 2.8 and 4.2 V than unmodified Li 2RuO 3 (190 mAh g -1). The modified and unmodified Li 2RuO 3 have irreversible capacities in the first charge/discharge process of 22 and 148 mAh g -1, respectively. The surface modification induced by Li 3PO 4 deposition enhances the structural stability of the Li 2RuO 3 surface during the initial charging process.",

keywords = "Epitaxial film model electrodes, Lithium phosphate, Lithium ruthenium oxide, Surface structure",

author = "Yueming Zheng and Sou Taminato and Youlong Xu and Kota Suzuki and Kyungsu Kim and Masaaki Hirayama and Ryoji Kanno",

year = "2012",

month = jun,

day = "15",

doi = "10.1016/j.jpowsour.2012.02.044",

language = "英语",

volume = "208",

pages = "447--451",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - High-capacity phase formation by surface modification of Li 3PO 4 on nanosized Li 2RuO 3 electrode for lithium batteries

AU - Zheng, Yueming

AU - Taminato, Sou

AU - Xu, Youlong

AU - Suzuki, Kota

AU - Kim, Kyungsu

AU - Hirayama, Masaaki

AU - Kanno, Ryoji

PY - 2012/6/15

Y1 - 2012/6/15

N2 - Effects of modifying the surface of lithium excess layered rock-salt type electrodes by Li 3PO 4 is investigated using epitaxial Li 2RuO 3 model electrodes. A 3.6-nm-thick amorphous Li 3PO 4 layer is deposited on a 25.5-nm-thick Li 2RuO 3 film by pulsed laser deposition. X-ray absorption near edge structure reveals that the modified Li 2RuO 3 surface had different electronic states of Ru from the unmodified Li 2RuO 3 surface, indicating that Li 3PO 4 deposition changes the structure of the Li 2RuO 3 surface. Li 3PO 4-modified Li 2RuO 3 has a much higher first discharge capacity (296 mAh g -1) between 2.8 and 4.2 V than unmodified Li 2RuO 3 (190 mAh g -1). The modified and unmodified Li 2RuO 3 have irreversible capacities in the first charge/discharge process of 22 and 148 mAh g -1, respectively. The surface modification induced by Li 3PO 4 deposition enhances the structural stability of the Li 2RuO 3 surface during the initial charging process.

AB - Effects of modifying the surface of lithium excess layered rock-salt type electrodes by Li 3PO 4 is investigated using epitaxial Li 2RuO 3 model electrodes. A 3.6-nm-thick amorphous Li 3PO 4 layer is deposited on a 25.5-nm-thick Li 2RuO 3 film by pulsed laser deposition. X-ray absorption near edge structure reveals that the modified Li 2RuO 3 surface had different electronic states of Ru from the unmodified Li 2RuO 3 surface, indicating that Li 3PO 4 deposition changes the structure of the Li 2RuO 3 surface. Li 3PO 4-modified Li 2RuO 3 has a much higher first discharge capacity (296 mAh g -1) between 2.8 and 4.2 V than unmodified Li 2RuO 3 (190 mAh g -1). The modified and unmodified Li 2RuO 3 have irreversible capacities in the first charge/discharge process of 22 and 148 mAh g -1, respectively. The surface modification induced by Li 3PO 4 deposition enhances the structural stability of the Li 2RuO 3 surface during the initial charging process.

KW - Epitaxial film model electrodes

KW - Lithium phosphate

KW - Lithium ruthenium oxide

KW - Surface structure

UR - https://www.scopus.com/pages/publications/84858725697

U2 - 10.1016/j.jpowsour.2012.02.044

DO - 10.1016/j.jpowsour.2012.02.044

M3 - 文章

AN - SCOPUS:84858725697

SN - 0378-7753

VL - 208

SP - 447

EP - 451

JO - Journal of Power Sources

JF - Journal of Power Sources

ER -