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Inhibiting the growth of lithium dendrites at high current densities with oriented graphene foams

Abstract

Li metal is an ideal anode material for lithium battery because of its extremely high theoretical specific capacity and the lowest negative electrochemical potential. A main obstruction hindering the utilization of Li metal anode is the formation of Li dendrites, which lowers the Coulombic efficiency and shortens the lifespan of battery, and even causes safety problems. In this paper, we report the use of oriented graphene foam (OGF) as the current collector to effectively inhibit the growth of Li dendrites. The Li electrode with OGF current collector (Li-OGF) showed high Coulombic efficiencies of 99%, 97.5% and 93% at 1, 2 and 5 mA cm−2, respectively. The Li-OGF cell was tested to be stable upon charging/discharging at a practical current density of 1 mA cm−2 for 300 cycles, indicating that OGF is an excellent skeleton for the electrochemical deposition of Li metal and for inhibiting the growth of Li dendrites.

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Publication details

The article was received on 25 May 2018, accepted on 11 Jul 2018 and first published on 11 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA04911D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Inhibiting the growth of lithium dendrites at high current densities with oriented graphene foams

    Y. Ma, B. Yao, M. zhang, H. Bai and G. Shi, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA04911D

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