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Research Article | Online first | Published: 19 April 2024

Unlocking supercapacitive energy storage potential: Catalyzing electrochemically inactive manganese oxides to active MnO2 via heterostructure reconstruction

Show Author's Information Baohong Zhang1,§,  Tao Jiang4,§,  Xinyan Zhou1,  Xiaoyu Fan3( ),  Binbin Jia2( ),  Lidong Li1( )
School of Chemistry, Beihang University, Beijing 100191, China
College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, ChinaThree Gorges University, Yichang 443002, China
Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
Shanghai GTX Semiconductor Co., Ltd., Shanghai 201806, China

§ Baohong Zhang and Tao Jiang contributed equally to this work.

Keywords:
reconfiguration, supercapacitor, p–n heterojunction, active MnO2, crystalline/amorphous structure
Topics:
Electrocatalysis
Cite this article:
Zhang B, Jiang T, Zhou X, et al. Unlocking supercapacitive energy storage potential: Catalyzing electrochemically inactive manganese oxides to active MnO2 via heterostructure reconstruction. Nano Research, 2024, https://doi.org/10.1007/s12274-024-6577-6
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Abstract Full text Electronic supplementary material About this article

Advancing supercapacitor system performance hinges on the innovation of novel electrode materials seamlessly integrated within distinct architectures. Herein, we introduce a direct approach for crafting nanorod arrays featuring crystalline/amorphous CuO/MnO2−x. This reconfigured heterostructure results in an elevated content of electrochemically active MnO2. The nanorod arrays serve as efficient capacitive anodes and are easily prepared via low-potential electrochemical activation. The resulting structure spontaneously forms a p–n heterojunction, developing a built-in electric field that dramatically facilitates the charge transport process. The intrinsic electric field, in conjunction with the crystalline/amorphous architecture, enables a large capacitance of 1.0 F·cm−2 at 1.0 mA·cm−2, an ultrahigh rate capability of approximately 85.4% at 15 mA·cm−2, and stable cycling performance with 92.4% retention after 10,000 cycles. Theoretical calculations reveal that the presence of heterojunctions allows for the optimization of the electronic structure of this composite, leading to improved conductivity and optimized OH− adsorption energy. This work provides new insights into the rational design of heterogeneous nanostructures, which hold great potential in energy storage applications.


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Abstract
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Electronic supplementary material
About this article

Unlocking supercapacitive energy storage potential: Catalyzing electrochemically inactive manganese oxides to active MnO2 via heterostructure reconstruction

Show Author's information Baohong Zhang1,§, Tao Jiang4,§, Xinyan Zhou1, Xiaoyu Fan3( ), Binbin Jia2( ), Lidong Li1( )
School of Chemistry, Beihang University, Beijing 100191, China
College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, ChinaThree Gorges University, Yichang 443002, China
Chinese Academy of Sciences (CAS) Key Laboratory of Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
Shanghai GTX Semiconductor Co., Ltd., Shanghai 201806, China

§ Baohong Zhang and Tao Jiang contributed equally to this work.

Abstract

Advancing supercapacitor system performance hinges on the innovation of novel electrode materials seamlessly integrated within distinct architectures. Herein, we introduce a direct approach for crafting nanorod arrays featuring crystalline/amorphous CuO/MnO2−x. This reconfigured heterostructure results in an elevated content of electrochemically active MnO2. The nanorod arrays serve as efficient capacitive anodes and are easily prepared via low-potential electrochemical activation. The resulting structure spontaneously forms a p–n heterojunction, developing a built-in electric field that dramatically facilitates the charge transport process. The intrinsic electric field, in conjunction with the crystalline/amorphous architecture, enables a large capacitance of 1.0 F·cm−2 at 1.0 mA·cm−2, an ultrahigh rate capability of approximately 85.4% at 15 mA·cm−2, and stable cycling performance with 92.4% retention after 10,000 cycles. Theoretical calculations reveal that the presence of heterojunctions allows for the optimization of the electronic structure of this composite, leading to improved conductivity and optimized OH− adsorption energy. This work provides new insights into the rational design of heterogeneous nanostructures, which hold great potential in energy storage applications.

Keywords: reconfiguration, supercapacitor, p–n heterojunction, active MnO2, crystalline/amorphous structure

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Publication history
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Acknowledgements

Publication history

Received: 25 December 2023
Revised: 11 February 2024
Accepted: 19 February 2024
Published: 19 April 2024

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© Tsinghua University Press 2024

Acknowledgements

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 52272181, 51872016, and 52201261).

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