Volume 62, Issue 8 e202215654
Research Article

Engineering p-Band Center of Oxygen Boosting H+ Intercalation in δ-MnO2 for Aqueous Zinc Ion Batteries

Jianhua Zhang

Jianhua Zhang

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

These authors contributed equally to this work.

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Wenbin Li

Corresponding Author

Wenbin Li

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

These authors contributed equally to this work.

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Jingjing Wang

Jingjing Wang

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

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Xiaohua Pu

Xiaohua Pu

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

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Gaini Zhang

Gaini Zhang

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

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Shuai Wang

Shuai Wang

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

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Ni Wang

Ni Wang

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

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Xifei Li

Corresponding Author

Xifei Li

Shaanxi International Joint Research Center of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

Key Laboratory of Advanced Batteries Materials for Electric Vehicles of China Petroleum and Chemical Industry Federation, Xi'an University of Technology, Xi'an, 710048, Shaanxi China

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First published: 24 December 2022
Citations: 49

Graphical Abstract

Tuning the ϵp of O in δ-MnO2 cathode can effectively increase H+ intercalation contribution with excellent rate capability for aqueous zinc ion batteries. The ϵp could be a significant descriptor for H+ intercalation contribution that describes a volcano curve as a function of ϵp, and the best cathode is optimized to be the Cu−MnO2 among Cu−, Ni−, Co−, Zn−MnO2.

Abstract

In aqueous zinc ion batteries (ZIBs), the H+ intercalation possesses superior electrochemical kinetics with excellent rate capability, however, precisely modulating H+ intercalation has been still challenging. Herein, a critical modification of pre-intercalating metal ions in the MnO2 interlayer (M−MnO2) with controllable p-band center (ϵp) of O is reported to modulate the H+ intercalation. The modulation of metal-O bond type and covalency degree on the average charge of O atom results in optimized ϵp and H+ adsorption energy for M−MnO2, thus promoting the balance between H+ adsorption and desorption, which plays a determinant role on H+ intercalation. The optimized Cu−MnO2 delivers superior rate capability with the capacity of 153 mAh g−1 at a high rate of 3 A g−1 after 1000 cycles. This work demonstrates that ϵp could be a significant descriptor for H+ intercalation, and tuning ϵp effectively increases H+ intercalation contribution with excellent rate capability in ZIBs.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the Supporting Information of this article.

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