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Highly conductive Mn3O4/MnS heterostructures building multi-shelled hollow microspheres for high-performance supercapacitors

•The multi-shelled architectures were prepared by a facile sacrificial-template method.•The Mn3O4/MnS heterostructures were produced by subsequent selective sulfurization.•The heterostructures and multi-shelled architecture contribute synergistically.•The obtained Mn3O4/MnS exhibited a high specific...

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Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2020-07, Vol.392, p.123890, Article 123890
Main Authors: Wang, Zhaoyue, Jia, Henan, Cai, Yifei, Li, Chun, Zheng, Xiaohang, Liang, Haoyan, Qi, Junlei, Cao, Jian, Feng, Jicai
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cited_by cdi_FETCH-LOGICAL-c297t-70cb41a15e7fee3dc64ce34992e61b670d2ad57aa95a3b4080a5901a6e79407d3
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container_title Chemical engineering journal (Lausanne, Switzerland : 1996)
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creator Wang, Zhaoyue
Jia, Henan
Cai, Yifei
Li, Chun
Zheng, Xiaohang
Liang, Haoyan
Qi, Junlei
Cao, Jian
Feng, Jicai
description •The multi-shelled architectures were prepared by a facile sacrificial-template method.•The Mn3O4/MnS heterostructures were produced by subsequent selective sulfurization.•The heterostructures and multi-shelled architecture contribute synergistically.•The obtained Mn3O4/MnS exhibited a high specific capacitance of 744 F g−1. Supercapacitors are promising energy storage devices with high power density and long cycle life, while the key challenge in the application is the fabrication of electrode materials with high surface area, good conductivity and high stability. Heterostructures consisting of binary chemical compositions could achieve superior electrochemical performances by creating abundant heterointerfaces with more reaction active sites, which could enhance the surface reaction kinetics and improve the conductivity. Meanwhile, hollow microspheres with complex internal architecture have been widely studied in advanced energy storage devices due to their high specific surface area, fast transportation of the electrolyte and prominent structural stability. Herein, we propose a feasible synthetic method of heterogeneous Mn3O4/MnS multi-shelled hollow microspheres. The highly conductive heterostructures as well as unique hollow multi-shelled architecture could synergistically contribute to the superior electrochemical performances. The Mn3O4/MnS electrode delivers a high specific capacitance of 744 F g−1, excellent rate capability and cycling stability (97.7% retention after 10,000 cycles). Furthermore, an asymmetric supercapacitor with Mn3O4/MnS as the cathode and active carbon as the anode exhibits a high specific capacitance of 185.2 F g−1 at 1 A g−1, with high energy density (65.8 W h kg−1) and power density (16000 W kg−1). The superior electrochemical performances could be attributed to the heterostructures and the stable multi-shelled structure.
doi_str_mv 10.1016/j.cej.2019.123890
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Supercapacitors are promising energy storage devices with high power density and long cycle life, while the key challenge in the application is the fabrication of electrode materials with high surface area, good conductivity and high stability. Heterostructures consisting of binary chemical compositions could achieve superior electrochemical performances by creating abundant heterointerfaces with more reaction active sites, which could enhance the surface reaction kinetics and improve the conductivity. Meanwhile, hollow microspheres with complex internal architecture have been widely studied in advanced energy storage devices due to their high specific surface area, fast transportation of the electrolyte and prominent structural stability. Herein, we propose a feasible synthetic method of heterogeneous Mn3O4/MnS multi-shelled hollow microspheres. The highly conductive heterostructures as well as unique hollow multi-shelled architecture could synergistically contribute to the superior electrochemical performances. The Mn3O4/MnS electrode delivers a high specific capacitance of 744 F g−1, excellent rate capability and cycling stability (97.7% retention after 10,000 cycles). Furthermore, an asymmetric supercapacitor with Mn3O4/MnS as the cathode and active carbon as the anode exhibits a high specific capacitance of 185.2 F g−1 at 1 A g−1, with high energy density (65.8 W h kg−1) and power density (16000 W kg−1). 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Supercapacitors are promising energy storage devices with high power density and long cycle life, while the key challenge in the application is the fabrication of electrode materials with high surface area, good conductivity and high stability. Heterostructures consisting of binary chemical compositions could achieve superior electrochemical performances by creating abundant heterointerfaces with more reaction active sites, which could enhance the surface reaction kinetics and improve the conductivity. Meanwhile, hollow microspheres with complex internal architecture have been widely studied in advanced energy storage devices due to their high specific surface area, fast transportation of the electrolyte and prominent structural stability. Herein, we propose a feasible synthetic method of heterogeneous Mn3O4/MnS multi-shelled hollow microspheres. The highly conductive heterostructures as well as unique hollow multi-shelled architecture could synergistically contribute to the superior electrochemical performances. The Mn3O4/MnS electrode delivers a high specific capacitance of 744 F g−1, excellent rate capability and cycling stability (97.7% retention after 10,000 cycles). Furthermore, an asymmetric supercapacitor with Mn3O4/MnS as the cathode and active carbon as the anode exhibits a high specific capacitance of 185.2 F g−1 at 1 A g−1, with high energy density (65.8 W h kg−1) and power density (16000 W kg−1). 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Supercapacitors are promising energy storage devices with high power density and long cycle life, while the key challenge in the application is the fabrication of electrode materials with high surface area, good conductivity and high stability. Heterostructures consisting of binary chemical compositions could achieve superior electrochemical performances by creating abundant heterointerfaces with more reaction active sites, which could enhance the surface reaction kinetics and improve the conductivity. Meanwhile, hollow microspheres with complex internal architecture have been widely studied in advanced energy storage devices due to their high specific surface area, fast transportation of the electrolyte and prominent structural stability. Herein, we propose a feasible synthetic method of heterogeneous Mn3O4/MnS multi-shelled hollow microspheres. The highly conductive heterostructures as well as unique hollow multi-shelled architecture could synergistically contribute to the superior electrochemical performances. The Mn3O4/MnS electrode delivers a high specific capacitance of 744 F g−1, excellent rate capability and cycling stability (97.7% retention after 10,000 cycles). Furthermore, an asymmetric supercapacitor with Mn3O4/MnS as the cathode and active carbon as the anode exhibits a high specific capacitance of 185.2 F g−1 at 1 A g−1, with high energy density (65.8 W h kg−1) and power density (16000 W kg−1). The superior electrochemical performances could be attributed to the heterostructures and the stable multi-shelled structure.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.cej.2019.123890</doi><orcidid>https://orcid.org/0000-0003-3367-1241</orcidid></addata></record>
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subjects Heterostructure
Manganese oxide
Manganese sulfide
Multi-shelled structure
Supercapacitors
title Highly conductive Mn3O4/MnS heterostructures building multi-shelled hollow microspheres for high-performance supercapacitors
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