Defect Engineering of Oxygen-Deficient Manganese Oxide to Achieve High-Performing Aqueous Zinc Ion Battery

Ting Xiong; Zhi Gen Yu; Haijun Wu; Yonghua Du; Qidong Xie; Jingsheng Chen; Yong Wei Zhang; Stephen John Pennycook; Wee Siang Vincent Lee; Junmin Xue

doi:10.1002/aenm.201803815

Defect Engineering of Oxygen-Deficient Manganese Oxide to Achieve High-Performing Aqueous Zinc Ion Battery

Ting Xiong
, Zhi Gen Yu
, Haijun Wu
, Yonghua Du
, Qidong Xie
, Jingsheng Chen
, Yong Wei Zhang
, Stephen John Pennycook
, Wee Siang Vincent Lee
, Junmin Xue

School of Materials Science and Engineering

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

649 Scopus citations

Abstract

A major limitation of MnO ₂ in aqueous Zn/MnO ₂ ion battery applications is the poor utilization of its electrochemical active surface area. Herein, it is shown that by generating oxygen vacancies (V _O ) in the MnO ₂ lattice, Gibbs free energy of Zn ²⁺ adsorption in the vicinity of V _O can be reduced to thermoneutral value (≈0.05 eV). This suggests that Zn ²⁺ adsorption/desorption process on oxygen-deficient MnO ₂ is more reversible as compared to pristine MnO ₂ . In addition, because of the fact that fewer electrons are needed for ZnO bonding in oxygen-deficient MnO ₂ , more valence electrons can be contributed into the delocalized electron cloud of the material, which aids in enhancing the attainable capacity. As a result, the stable Zn/oxygen-deficient MnO ₂ battery is able to deliver one of the highest capacities of 345 mAh g ⁻¹ reported for a birnessite MnO ₂ system. This excellent electrochemical performance suggests that generating oxygen vacancies in MnO ₂ may aid in the future development of advanced cathodes for aqueous Zn ion batteries.

Original language	English
Article number	1803815
Journal	Advanced Energy Materials
Volume	9
Issue number	14
DOIs	https://doi.org/10.1002/aenm.201803815
State	Published - 11 Apr 2019

Keywords

defect engineering
high performing
MnO
oxygen deficiency
zinc ion batteries

UN SDGs

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

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10.1002/aenm.201803815

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@article{fed94cfaf6d54320ac02e4213d8ed2d5,

title = "Defect Engineering of Oxygen-Deficient Manganese Oxide to Achieve High-Performing Aqueous Zinc Ion Battery",

abstract = " A major limitation of MnO 2 in aqueous Zn/MnO 2 ion battery applications is the poor utilization of its electrochemical active surface area. Herein, it is shown that by generating oxygen vacancies (V O ) in the MnO 2 lattice, Gibbs free energy of Zn 2+ adsorption in the vicinity of V O can be reduced to thermoneutral value (≈0.05 eV). This suggests that Zn 2+ adsorption/desorption process on oxygen-deficient MnO 2 is more reversible as compared to pristine MnO 2 . In addition, because of the fact that fewer electrons are needed for ZnO bonding in oxygen-deficient MnO 2 , more valence electrons can be contributed into the delocalized electron cloud of the material, which aids in enhancing the attainable capacity. As a result, the stable Zn/oxygen-deficient MnO 2 battery is able to deliver one of the highest capacities of 345 mAh g −1 reported for a birnessite MnO 2 system. This excellent electrochemical performance suggests that generating oxygen vacancies in MnO 2 may aid in the future development of advanced cathodes for aqueous Zn ion batteries.",

keywords = "defect engineering, high performing, MnO, oxygen deficiency, zinc ion batteries",

author = "Ting Xiong and Yu, \{Zhi Gen\} and Haijun Wu and Yonghua Du and Qidong Xie and Jingsheng Chen and Zhang, \{Yong Wei\} and Pennycook, \{Stephen John\} and Lee, \{Wee Siang Vincent\} and Junmin Xue",

note = "Publisher Copyright: {\textcopyright} 2019 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim",

year = "2019",

month = apr,

day = "11",

doi = "10.1002/aenm.201803815",

language = "英语",

volume = "9",

journal = "Advanced Energy Materials",

issn = "1614-6832",

publisher = "John Wiley and Sons Inc",

number = "14",

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TY - JOUR

T1 - Defect Engineering of Oxygen-Deficient Manganese Oxide to Achieve High-Performing Aqueous Zinc Ion Battery

AU - Xiong, Ting

AU - Yu, Zhi Gen

AU - Wu, Haijun

AU - Du, Yonghua

AU - Xie, Qidong

AU - Chen, Jingsheng

AU - Zhang, Yong Wei

AU - Pennycook, Stephen John

AU - Lee, Wee Siang Vincent

AU - Xue, Junmin

PY - 2019/4/11

Y1 - 2019/4/11

N2 - A major limitation of MnO 2 in aqueous Zn/MnO 2 ion battery applications is the poor utilization of its electrochemical active surface area. Herein, it is shown that by generating oxygen vacancies (V O ) in the MnO 2 lattice, Gibbs free energy of Zn 2+ adsorption in the vicinity of V O can be reduced to thermoneutral value (≈0.05 eV). This suggests that Zn 2+ adsorption/desorption process on oxygen-deficient MnO 2 is more reversible as compared to pristine MnO 2 . In addition, because of the fact that fewer electrons are needed for ZnO bonding in oxygen-deficient MnO 2 , more valence electrons can be contributed into the delocalized electron cloud of the material, which aids in enhancing the attainable capacity. As a result, the stable Zn/oxygen-deficient MnO 2 battery is able to deliver one of the highest capacities of 345 mAh g −1 reported for a birnessite MnO 2 system. This excellent electrochemical performance suggests that generating oxygen vacancies in MnO 2 may aid in the future development of advanced cathodes for aqueous Zn ion batteries.

AB - A major limitation of MnO 2 in aqueous Zn/MnO 2 ion battery applications is the poor utilization of its electrochemical active surface area. Herein, it is shown that by generating oxygen vacancies (V O ) in the MnO 2 lattice, Gibbs free energy of Zn 2+ adsorption in the vicinity of V O can be reduced to thermoneutral value (≈0.05 eV). This suggests that Zn 2+ adsorption/desorption process on oxygen-deficient MnO 2 is more reversible as compared to pristine MnO 2 . In addition, because of the fact that fewer electrons are needed for ZnO bonding in oxygen-deficient MnO 2 , more valence electrons can be contributed into the delocalized electron cloud of the material, which aids in enhancing the attainable capacity. As a result, the stable Zn/oxygen-deficient MnO 2 battery is able to deliver one of the highest capacities of 345 mAh g −1 reported for a birnessite MnO 2 system. This excellent electrochemical performance suggests that generating oxygen vacancies in MnO 2 may aid in the future development of advanced cathodes for aqueous Zn ion batteries.

KW - defect engineering

KW - high performing

KW - MnO

KW - oxygen deficiency

KW - zinc ion batteries

UR - https://www.scopus.com/pages/publications/85061567138

U2 - 10.1002/aenm.201803815

DO - 10.1002/aenm.201803815

M3 - 文章

AN - SCOPUS:85061567138

SN - 1614-6832

VL - 9

JO - Advanced Energy Materials

JF - Advanced Energy Materials

IS - 14

M1 - 1803815

ER -

Defect Engineering of Oxygen-Deficient Manganese Oxide to Achieve High-Performing Aqueous Zinc Ion Battery

Abstract

Keywords

UN SDGs

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