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Erschienen in: Journal of Materials Science: Materials in Electronics 13/2019

03.06.2019

The surface capacitance behavior and its contribution to the excellent performance of cobalt ferrite/carbon anode in lithium storage

verfasst von: Yuzhu Li, Yanshuang Meng, Mingjun Xiao, Xinglian Liu, Fuliang Zhu, Yue Zhang

Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 13/2019

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Abstract

Carbon coated CoFe2O4 (CFO/C) is synthesized with the polyvinylpyrrolidone as carbon source by using the hydrothermal and subsequent heat treatment. The particle size of the CFO (CFO/C) is less than 50 nm, which facilitates the transport of Li+. The CFO/C composite delivers reversible discharge specific capacity of 934.8, 790.5, 685.9, 524.6, and 418.7 mAh g−1 at current density of 0.2C, 0.5C, 1C, 3C, 5C, respectively. When the current density is 1C, the CFO/C composite maintains the reversible specific discharge capacity of 775.6 mAh g−1 after 380 cycles. The quantitative calculation of the Cyclic voltammetry (CV) shows that the total charge is derived from the contribution of both surface capacitance behavior and diffusion-controlled process during lithium storage, and the capacitance behavior plays a critical role in determining the rate performance and cycle stability.

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Metadaten
Titel
The surface capacitance behavior and its contribution to the excellent performance of cobalt ferrite/carbon anode in lithium storage
verfasst von
Yuzhu Li
Yanshuang Meng
Mingjun Xiao
Xinglian Liu
Fuliang Zhu
Yue Zhang
Publikationsdatum
03.06.2019
Verlag
Springer US
Erschienen in
Journal of Materials Science: Materials in Electronics / Ausgabe 13/2019
Print ISSN: 0957-4522
Elektronische ISSN: 1573-482X
DOI
https://doi.org/10.1007/s10854-019-01629-x

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