Gradient Concentration Refilling of N Stabilizes Oxygen Vacancies for Enhanced Zn2+ Storage

Ming Wang; Guangyu Zhao; Xiaoming Bai; Weijian Yu; Chenghao Zhao; Zhenren Gao; Pengbo Lyu; Zhaoyu Chen; Naiqing Zhang

doi:10.1002/aenm.202301730

Gradient Concentration Refilling of N Stabilizes Oxygen Vacancies for Enhanced Zn²⁺ Storage

Ming Wang
, Guangyu Zhao^*
, Xiaoming Bai
, Weijian Yu
, Chenghao Zhao
, Zhenren Gao
, Pengbo Lyu^*
, Zhaoyu Chen
, Naiqing Zhang^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Tiangtan University
Harbin Institute of Technology

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

45 Scopus citations

Abstract

The introduction of oxygen vacancies into aqueous zinc ion battery (ZIB) cathodes can significantly improve the diffusion kinetics of Zn²⁺, endowing enhanced electrochemical performance. However, the stability of oxygen vacancies in batteries during aqueous electrolyte cycling has been overlooked. Here, the oxygen vacancy is stabilized by the refilling of different impurity atoms, and gradient concentration refilling of N achieves the most stable state of the oxygen vacancy with minimum formation energy (4.77 eV). The obtained Zn₃V₂O₇(OH)₂·2H₂O with gradient N refilling of partial oxygen vacancies (N-V_O-ZVO) achieves more stable oxygen vacancies and a low Zn²⁺ diffusion energy barrier (0.19 eV) with an ultra-high rate performance of 186 mAh g⁻¹ at 100 A g⁻¹ and capacity retention rate of 84.9% after 10 000 cycles.

Original language	English
Article number	2301730
Journal	Advanced Energy Materials
Volume	13
Issue number	38
DOIs	https://doi.org/10.1002/aenm.202301730
State	Published - 13 Oct 2023
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

N refilled
aqueous zinc ion batteries
gradient concentration
oxygen vacancy stability

Access to Document

10.1002/aenm.202301730

Cite this

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title = "Gradient Concentration Refilling of N Stabilizes Oxygen Vacancies for Enhanced Zn2+ Storage",

abstract = "The introduction of oxygen vacancies into aqueous zinc ion battery (ZIB) cathodes can significantly improve the diffusion kinetics of Zn2+, endowing enhanced electrochemical performance. However, the stability of oxygen vacancies in batteries during aqueous electrolyte cycling has been overlooked. Here, the oxygen vacancy is stabilized by the refilling of different impurity atoms, and gradient concentration refilling of N achieves the most stable state of the oxygen vacancy with minimum formation energy (4.77 eV). The obtained Zn3V2O7(OH)2·2H2O with gradient N refilling of partial oxygen vacancies (N-VO-ZVO) achieves more stable oxygen vacancies and a low Zn2+ diffusion energy barrier (0.19 eV) with an ultra-high rate performance of 186 mAh g−1 at 100 A g−1 and capacity retention rate of 84.9\% after 10 000 cycles.",

keywords = "N refilled, aqueous zinc ion batteries, gradient concentration, oxygen vacancy stability",

author = "Ming Wang and Guangyu Zhao and Xiaoming Bai and Weijian Yu and Chenghao Zhao and Zhenren Gao and Pengbo Lyu and Zhaoyu Chen and Naiqing Zhang",

note = "Publisher Copyright: {\textcopyright} 2023 Wiley-VCH GmbH.",

year = "2023",

month = oct,

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doi = "10.1002/aenm.202301730",

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T1 - Gradient Concentration Refilling of N Stabilizes Oxygen Vacancies for Enhanced Zn2+ Storage

AU - Wang, Ming

AU - Zhao, Guangyu

AU - Bai, Xiaoming

AU - Yu, Weijian

AU - Zhao, Chenghao

AU - Gao, Zhenren

AU - Lyu, Pengbo

AU - Chen, Zhaoyu

AU - Zhang, Naiqing

PY - 2023/10/13

Y1 - 2023/10/13

N2 - The introduction of oxygen vacancies into aqueous zinc ion battery (ZIB) cathodes can significantly improve the diffusion kinetics of Zn2+, endowing enhanced electrochemical performance. However, the stability of oxygen vacancies in batteries during aqueous electrolyte cycling has been overlooked. Here, the oxygen vacancy is stabilized by the refilling of different impurity atoms, and gradient concentration refilling of N achieves the most stable state of the oxygen vacancy with minimum formation energy (4.77 eV). The obtained Zn3V2O7(OH)2·2H2O with gradient N refilling of partial oxygen vacancies (N-VO-ZVO) achieves more stable oxygen vacancies and a low Zn2+ diffusion energy barrier (0.19 eV) with an ultra-high rate performance of 186 mAh g−1 at 100 A g−1 and capacity retention rate of 84.9% after 10 000 cycles.

AB - The introduction of oxygen vacancies into aqueous zinc ion battery (ZIB) cathodes can significantly improve the diffusion kinetics of Zn2+, endowing enhanced electrochemical performance. However, the stability of oxygen vacancies in batteries during aqueous electrolyte cycling has been overlooked. Here, the oxygen vacancy is stabilized by the refilling of different impurity atoms, and gradient concentration refilling of N achieves the most stable state of the oxygen vacancy with minimum formation energy (4.77 eV). The obtained Zn3V2O7(OH)2·2H2O with gradient N refilling of partial oxygen vacancies (N-VO-ZVO) achieves more stable oxygen vacancies and a low Zn2+ diffusion energy barrier (0.19 eV) with an ultra-high rate performance of 186 mAh g−1 at 100 A g−1 and capacity retention rate of 84.9% after 10 000 cycles.

KW - N refilled

KW - aqueous zinc ion batteries

KW - gradient concentration

KW - oxygen vacancy stability

UR - https://www.scopus.com/pages/publications/85168387000

U2 - 10.1002/aenm.202301730

DO - 10.1002/aenm.202301730

M3 - 文章

AN - SCOPUS:85168387000

SN - 1614-6832

VL - 13

JO - Advanced Energy Materials

JF - Advanced Energy Materials

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M1 - 2301730

ER -