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Highly dispersed Zn nanoparticles confined in nanoporous carbon network: promising anode materials for sodium and potassium ion batteries

Abstract

Highly dispersed Zn nanoparticles confined in nanoporous carbon network (ZNP/C) is prepared by direct annealing Zn-containing metal-organic framework in inert atmosphere and investigated as anode material of sodium and potassium ion batteries for the first time. ZNP/C has unique structural features, such as highly dispersed Zn nanoparticles, nanoporous carbon network and high surface area, which can efficiently enhance reactivity, facilitate ion/electron transportation and buffer volume changes, and thus greatly improve their Na/K storage performance. As sodium ion battery anode, ZNP/C-600 shows a high capacity of 361 mAh g-1 over 100 cycles at 0.1 A g-1. And an ultrahigh capacity of 227 mAh g-1 sustains after 1000 cycles at 2 A g-1. When employed as potassium ion battery anode, ZNP/C-600 exhibits a high capacity of 200 mAh g-1 over 100 cycles at 0.1 A g-1, and a stable capacity of 145 mAh g-1 over 300 cycles at 0.5 A g-1. Qualitative and Quantitative analysis reveal that capacitance and diffusion mechanisms account for the superior Na/K storage performance, in which the capacitance plays a significant role.

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Publication details

The article was received on 05 Jun 2018, accepted on 30 Jul 2018 and first published on 31 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA05297B
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Highly dispersed Zn nanoparticles confined in nanoporous carbon network: promising anode materials for sodium and potassium ion batteries

    C. Yan, X. Gu, L. Zhang, Y. wang, L. Yan, D. Liu, L. Li, P. Dai and X. Zhao, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA05297B

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