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05 January 2021
Sculpturing solid polymer spheres into internal gridded hollow carbon spheres under controlled pyrolysis micro-environment
An-Hui Lu(
)
)
Keywords:
gridded hollow structure, pyrolysis micro-environment, porous carbon spheres, solid polymer spheres
Topics:
CarbonEnergy storageLithium compoundsLithium sulfur batteriesMicroporosity Porous materialsSilicaSulfur compounds
Cite this article:
Yu X-F, Li W-C, Hu Y-R, et al.
Sculpturing solid polymer spheres into internal gridded hollow carbon spheres under controlled pyrolysis micro-environment.
Nano Research,
2021, 14(5): 1565-1573.
https://doi.org/10.1007/s12274-021-3290-6
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Porous carbon spheres with an internal gridded hollow structure and microporous shell have always been attractive as carbon hosts for electrochemical energy storage. Such carbon hosts can limit active species loss and enhance electronic conductivity throughout the entire framework. Herein, a synthesis approach of internal gridded hollow carbon spheres is developed from solid polymer spheres rather than originally gridded polymer spheres under a controlled pyrolysis micro-environment. The crucial point of this approach is the fabrication of a silica fence around solid polymer spheres, under which the free escaping of the pyrolysis gas will be partly impeded, thus offering a reconstitution opportunity for an internal structure of solid polymer spheres. As a result, the interior of carbon spheres is sculptured into a gridded hollow structure with microporous skin. Furthermore, the size and density of carbon-bridge grids can be modulated by altering the crosslinking degree of polymer spheres and varying pyrolysis conditions. Such gridded hollow carbon spheres show good performance as sulfur hosts for Li-S battery.
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Sculpturing solid polymer spheres into internal gridded hollow carbon spheres under controlled pyrolysis micro-environment
An-Hui Lu(
)
)
Abstract
Porous carbon spheres with an internal gridded hollow structure and microporous shell have always been attractive as carbon hosts for electrochemical energy storage. Such carbon hosts can limit active species loss and enhance electronic conductivity throughout the entire framework. Herein, a synthesis approach of internal gridded hollow carbon spheres is developed from solid polymer spheres rather than originally gridded polymer spheres under a controlled pyrolysis micro-environment. The crucial point of this approach is the fabrication of a silica fence around solid polymer spheres, under which the free escaping of the pyrolysis gas will be partly impeded, thus offering a reconstitution opportunity for an internal structure of solid polymer spheres. As a result, the interior of carbon spheres is sculptured into a gridded hollow structure with microporous skin. Furthermore, the size and density of carbon-bridge grids can be modulated by altering the crosslinking degree of polymer spheres and varying pyrolysis conditions. Such gridded hollow carbon spheres show good performance as sulfur hosts for Li-S battery.
Keywords:
gridded hollow structure, pyrolysis micro-environment, porous carbon spheres, solid polymer spheres
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Publication history
Copyright
Acknowledgements
Publication history
Received: 10 November 2020
Revised: 04 December 2020
Accepted: 08 December 2020
Published:
05 January 2021
Issue date: May 2021
Copyright
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
Acknowledgements
The authors are grateful to the financial support by the National Natural Science Foundation of China (Nos. 21776041 and 21875028), and Cheung Kong Scholars Programme of China (No. T2015036).
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