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A novel 3D porous pseudographite/Si/Ni composite anode material fabricated by a facile method

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Abstract

A novel 3D porous pseudographite/Si/Ni (PG/Si/Ni) composite was prepared by a facile low-temperature calcination method using saturable starch and NiCl2·6H2O as precursors. The pseudographite matrix of PG/Si/Ni was obtained from the reaction between starch and NiCl2·6H2O during the calcination process. Compared to the C/Si electrode, the PG/Si/Ni electrode delivers a high reversible specific capacity of 659.66 mA h g−1 at a current density of 1 A g−1 even after 2000 cycles. In addition, the PG/Si/Ni electrode shows superior rate performance and still maintains a high specific capacity of 1324.01 mA h g−1 when the cycle current density returns to 0.1 A g−1. The porous pseudographite structure is able to improve Li+ diffusion efficiency, reduce pulverization and lead to the formation of stable SEI layers during the cycling process. Therefore, these results suggest that the 3D porous pseudographite/Si/Ni composite is a promising novel anode material. Besides, the low-temperature synthesis method of the pseudographite matrix can be applied for further modification of carbon-based Si anode materials.

Graphical abstract: A novel 3D porous pseudographite/Si/Ni composite anode material fabricated by a facile method

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Supplementary files

Article information


Submitted
06 Mar 2020
Accepted
24 Apr 2020
First published
28 Apr 2020

Dalton Trans., 2020, Advance Article
Article type
Paper

A novel 3D porous pseudographite/Si/Ni composite anode material fabricated by a facile method

W. Su, R. Wan, Y. Liang, Y. Zuo and Y. Tang, Dalton Trans., 2020, Advance Article , DOI: 10.1039/D0DT00856G

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