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Zn2TiO4 spheres coated with polypyrrole as high-performance negative for Li-ion batteries

Zn2TiO4 spheres coated with polypyrrole as high-performance negative for Li-ion batteries In this study, polypyrrole-coated Zn2TiO4 (Zn2TiO4@PPy) composites were constructed through solvothermal route and a facile ice-water bath strategy, and the PPy coating layer possessing preeminent electrical conductivity could enhance the electronic conductivity of pristine Zn2TiO4 and further elevate the whole electrochemical performance of composites as negative materials for Li-ion batteries. All samples possessed the similar spherical morphologies with diameter from 150 to 200 nm and the introduction of PPy layer rendered the surface of the Zn2TiO4 rough but did not affect the crystal structure of Zn2TiO4. Additionally, the as-prepared Zn2TiO4@PPy composites display higher specific capacities than that of pristine Zn2TiO4. Among them, the Zn2TiO4@PPy (3.7wt%) sample can deliver delithiation/lithiation capacities of 297.5 (330.7), 248.4 (256.1), 235.0 (242.2), 211.7 (214.9), 197.0 (199.0), 184.8 (185.5), and 159.6 (160.9) mAh g−1 cycled at 50, 100, 200, 300, 400, 500, and 1000 mA g−1, respectively. The research results testified that the decoration with appropriate high conductive PPy coating layer could largely promote the electrochemical properties of Zn2TiO4 as negative for Li-ion batteries. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Ionics Springer Journals

Zn2TiO4 spheres coated with polypyrrole as high-performance negative for Li-ion batteries

Ionics , Volume 28 (10) – Oct 1, 2022

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References (40)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
0947-7047
eISSN
1862-0760
DOI
10.1007/s11581-022-04705-1
Publisher site
See Article on Publisher Site

Abstract

In this study, polypyrrole-coated Zn2TiO4 (Zn2TiO4@PPy) composites were constructed through solvothermal route and a facile ice-water bath strategy, and the PPy coating layer possessing preeminent electrical conductivity could enhance the electronic conductivity of pristine Zn2TiO4 and further elevate the whole electrochemical performance of composites as negative materials for Li-ion batteries. All samples possessed the similar spherical morphologies with diameter from 150 to 200 nm and the introduction of PPy layer rendered the surface of the Zn2TiO4 rough but did not affect the crystal structure of Zn2TiO4. Additionally, the as-prepared Zn2TiO4@PPy composites display higher specific capacities than that of pristine Zn2TiO4. Among them, the Zn2TiO4@PPy (3.7wt%) sample can deliver delithiation/lithiation capacities of 297.5 (330.7), 248.4 (256.1), 235.0 (242.2), 211.7 (214.9), 197.0 (199.0), 184.8 (185.5), and 159.6 (160.9) mAh g−1 cycled at 50, 100, 200, 300, 400, 500, and 1000 mA g−1, respectively. The research results testified that the decoration with appropriate high conductive PPy coating layer could largely promote the electrochemical properties of Zn2TiO4 as negative for Li-ion batteries.

Journal

IonicsSpringer Journals

Published: Oct 1, 2022

Keywords: Zn2TiO4; PPy; Negative electrode; Electrochemical performance; Li-ion batteries

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