g-C3N4@COF heterojunction filler for polymer electrolytes enables fast Li+ transport and high mechanical strength

Solid polymer electrolytes (SPEs) show great promise for high-energy and high-safety lithium metal batteries. However, current SPEs suffer from low ionic conductivity and poor mechanical strength. Herein, the g-C 3 N 4 @COF heterojunction filler is constructed for SPEs for fast Li + transport and hi...

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Veröffentlicht in:Ionics 2024-11, Vol.30 (11), p.7051-7059
Hauptverfasser: Liu, Yongbiao, Song, Yang, Zhang, Yongshang, Liu, Jiande, Li, Lin, Zhang, Linsen, Du, Lulu
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container_end_page 7059
container_issue 11
container_start_page 7051
container_title Ionics
container_volume 30
creator Liu, Yongbiao
Song, Yang
Zhang, Yongshang
Liu, Jiande
Li, Lin
Zhang, Linsen
Du, Lulu
description Solid polymer electrolytes (SPEs) show great promise for high-energy and high-safety lithium metal batteries. However, current SPEs suffer from low ionic conductivity and poor mechanical strength. Herein, the g-C 3 N 4 @COF heterojunction filler is constructed for SPEs for fast Li + transport and high Li + transference number. In addition, a robust 3D network is fabricated by using g-C 3 N 4 @COF heterojunction filler in order to further improve the mechanical robustness and electrochemical stability. As a consequence, the g-C 3 N 4 @COF-3D network/polymer electrolyte displays an ionic conductivity of 1.25×10 −4 S cm −1 at 30 ℃, an electrochemical window of 5.0 V and the tensile strength of 8.613 MPa. Furthermore, the assembled LiFePO 4 //Li battery with the g-C 3 N 4 @COF-3D network/polymer electrolyte presents remarkable cycling stability with a capacity retention of 99.71% after 600 cycles. The above results indicate the great potential of the g-C 3 N 4 @COF-3D network/polymer electrolyte for advanced energy storage devices.
doi_str_mv 10.1007/s11581-024-05796-8
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However, current SPEs suffer from low ionic conductivity and poor mechanical strength. Herein, the g-C 3 N 4 @COF heterojunction filler is constructed for SPEs for fast Li + transport and high Li + transference number. In addition, a robust 3D network is fabricated by using g-C 3 N 4 @COF heterojunction filler in order to further improve the mechanical robustness and electrochemical stability. As a consequence, the g-C 3 N 4 @COF-3D network/polymer electrolyte displays an ionic conductivity of 1.25×10 −4 S cm −1 at 30 ℃, an electrochemical window of 5.0 V and the tensile strength of 8.613 MPa. Furthermore, the assembled LiFePO 4 //Li battery with the g-C 3 N 4 @COF-3D network/polymer electrolyte presents remarkable cycling stability with a capacity retention of 99.71% after 600 cycles. 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subjects Carbon nitride
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemistry
Electrolytes
Energy Storage
Fillers
Heterojunctions
Ion currents
Lithium batteries
Molten salt electrolytes
Optical and Electronic Materials
Polymers
Renewable and Green Energy
Solid electrolytes
Stability
Tensile strength
title g-C3N4@COF heterojunction filler for polymer electrolytes enables fast Li+ transport and high mechanical strength
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