Spray-pyrolysis-assisted synthesis of yolk@shell anatase with rich oxygen vacancies for efficient sodium storage

Zhuo Chen; Linhan Xu; Qiang Chen; Ping Hu; Zhenhui Liu; Qiang Yu; Ting Zhu; Huancheng Liu; Guangwu Hu; Zizhong Zhu; Liang Zhou; Liqiang Mai

doi:10.1039/c8ta11440d

Spray-pyrolysis-assisted synthesis of yolk@shell anatase with rich oxygen vacancies for efficient sodium storage

Zhuo Chen, Linhan Xu, Qiang Chen, Ping Hu, Zhenhui Liu, Qiang Yu, Ting Zhu, Huancheng Liu, Guangwu Hu, Zizhong Zhu^*, Liang Zhou, Liqiang Mai

^*Corresponding author for this work

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

42 Citations (Scopus)

Abstract

Herein, yolk@shell structured anatase TiO₂ microspheres are produced by a facile spray-pyrolysis-assisted method. Through introducing oxygen vacancies by hydrogen treatment, yolk@shell structured TiO_2-x microspheres are also obtained. The as-synthesized yolk@shell TiO_2-x demonstrates a high reversible capacity (230.7 mA h g^-1 after 200 cycles at 0.05 A g^-1) and remarkable long-term cycling stability (capacity retention of 91.7% after 1000 cycles at 1 A g^-1). DFT calculations reveal that introducing oxygen vacancies into TiO₂ enhances the electrical conductivity, lowers the sodiation energy barrier, and facilitates Na⁺ diffusion kinetics. This work sheds light on the rational design of high-performance electrode materials through integrating the yolk@shell structure and oxygen vacancies.

Original language	English
Pages (from-to)	6740-6746
Number of pages	7
Journal	Journal of Materials Chemistry A
Volume	7
Issue number	12
DOIs	https://doi.org/10.1039/c8ta11440d
Publication status	Published - 2019
Externally published	Yes

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title = "Spray-pyrolysis-assisted synthesis of yolk@shell anatase with rich oxygen vacancies for efficient sodium storage",

abstract = "Herein, yolk@shell structured anatase TiO2 microspheres are produced by a facile spray-pyrolysis-assisted method. Through introducing oxygen vacancies by hydrogen treatment, yolk@shell structured TiO2-x microspheres are also obtained. The as-synthesized yolk@shell TiO2-x demonstrates a high reversible capacity (230.7 mA h g-1 after 200 cycles at 0.05 A g-1) and remarkable long-term cycling stability (capacity retention of 91.7% after 1000 cycles at 1 A g-1). DFT calculations reveal that introducing oxygen vacancies into TiO2 enhances the electrical conductivity, lowers the sodiation energy barrier, and facilitates Na+ diffusion kinetics. This work sheds light on the rational design of high-performance electrode materials through integrating the yolk@shell structure and oxygen vacancies.",

author = "Zhuo Chen and Linhan Xu and Qiang Chen and Ping Hu and Zhenhui Liu and Qiang Yu and Ting Zhu and Huancheng Liu and Guangwu Hu and Zizhong Zhu and Liang Zhou and Liqiang Mai",

note = "Publisher Copyright: {\textcopyright} 2019 The Royal Society of Chemistry.",

year = "2019",

doi = "10.1039/c8ta11440d",

language = "English",

volume = "7",

pages = "6740--6746",

journal = "Journal of Materials Chemistry A",

issn = "2050-7488",

publisher = "Royal Society of Chemistry",

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}

TY - JOUR

T1 - Spray-pyrolysis-assisted synthesis of yolk@shell anatase with rich oxygen vacancies for efficient sodium storage

AU - Chen, Zhuo

AU - Xu, Linhan

AU - Chen, Qiang

AU - Hu, Ping

AU - Liu, Zhenhui

AU - Yu, Qiang

AU - Zhu, Ting

AU - Liu, Huancheng

AU - Hu, Guangwu

AU - Zhu, Zizhong

AU - Zhou, Liang

AU - Mai, Liqiang

PY - 2019

Y1 - 2019

N2 - Herein, yolk@shell structured anatase TiO2 microspheres are produced by a facile spray-pyrolysis-assisted method. Through introducing oxygen vacancies by hydrogen treatment, yolk@shell structured TiO2-x microspheres are also obtained. The as-synthesized yolk@shell TiO2-x demonstrates a high reversible capacity (230.7 mA h g-1 after 200 cycles at 0.05 A g-1) and remarkable long-term cycling stability (capacity retention of 91.7% after 1000 cycles at 1 A g-1). DFT calculations reveal that introducing oxygen vacancies into TiO2 enhances the electrical conductivity, lowers the sodiation energy barrier, and facilitates Na+ diffusion kinetics. This work sheds light on the rational design of high-performance electrode materials through integrating the yolk@shell structure and oxygen vacancies.

AB - Herein, yolk@shell structured anatase TiO2 microspheres are produced by a facile spray-pyrolysis-assisted method. Through introducing oxygen vacancies by hydrogen treatment, yolk@shell structured TiO2-x microspheres are also obtained. The as-synthesized yolk@shell TiO2-x demonstrates a high reversible capacity (230.7 mA h g-1 after 200 cycles at 0.05 A g-1) and remarkable long-term cycling stability (capacity retention of 91.7% after 1000 cycles at 1 A g-1). DFT calculations reveal that introducing oxygen vacancies into TiO2 enhances the electrical conductivity, lowers the sodiation energy barrier, and facilitates Na+ diffusion kinetics. This work sheds light on the rational design of high-performance electrode materials through integrating the yolk@shell structure and oxygen vacancies.

UR - http://www.scopus.com/inward/record.url?scp=85063164345&partnerID=8YFLogxK

U2 - 10.1039/c8ta11440d

DO - 10.1039/c8ta11440d

M3 - Article

AN - SCOPUS:85063164345

SN - 2050-7488

VL - 7

SP - 6740

EP - 6746

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

IS - 12

ER -

Spray-pyrolysis-assisted synthesis of yolk@shell anatase with rich oxygen vacancies for efficient sodium storage

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