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Coral-like CoP hollow composites as effective host cathodes for lithium-sulfur batteries

Coral-like CoP hollow composites as effective host cathodes for lithium-sulfur batteries Designing a better framework for anchoring sulfur is critical for lithium-sulfur battery. Coral-like CoP composites with interconnected pore channels were synthesized via precipitation and phosphorization and were used as the host materials for sulfur (CoP@S). The developed unique architecture possesses the ability to both physically confine polysulfides and chemically bind these species inside the host surface, efficient pathways to facilitate electron/ion transportation, good structural durability to buffer the volume variation of sulfur, and has an elastic protecting shell layer to block the soluble of polysulfides. Owing to these advantages, the resulting CoP@S electrode delivered a high charge capacity of 766 mAh/g with high first columbic efficiency of 98.2% at 0.2 C, good rate capability of 586 mAh/g at 1 C, and good long cycling stability (with a capacity of 438 mAh/g after 500 cycles at 2 C), suggesting excellent high-rate long cycling performance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Coral-like CoP hollow composites as effective host cathodes for lithium-sulfur batteries

Ionics , Volume 25 (10) – May 22, 2019

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References (46)

Publisher
Springer Journals
Copyright
Copyright © 2019 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Chemistry; Electrochemistry; Renewable and Green Energy; Optical and Electronic Materials; Condensed Matter Physics; Energy Storage
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-019-03047-9
Publisher site
See Article on Publisher Site

Abstract

Designing a better framework for anchoring sulfur is critical for lithium-sulfur battery. Coral-like CoP composites with interconnected pore channels were synthesized via precipitation and phosphorization and were used as the host materials for sulfur (CoP@S). The developed unique architecture possesses the ability to both physically confine polysulfides and chemically bind these species inside the host surface, efficient pathways to facilitate electron/ion transportation, good structural durability to buffer the volume variation of sulfur, and has an elastic protecting shell layer to block the soluble of polysulfides. Owing to these advantages, the resulting CoP@S electrode delivered a high charge capacity of 766 mAh/g with high first columbic efficiency of 98.2% at 0.2 C, good rate capability of 586 mAh/g at 1 C, and good long cycling stability (with a capacity of 438 mAh/g after 500 cycles at 2 C), suggesting excellent high-rate long cycling performance.

Journal

IonicsSpringer Journals

Published: May 22, 2019

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