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Issue 12, 2017
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Direct exfoliation of the anode graphite of used Li-ion batteries into few-layer graphene sheets: a green and high yield route to high-quality graphene preparation

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Abstract

Recycling anode graphite remains a significant barrier to the recovery of used Li-ion batteries. In this study, we show that anode graphite in used lithium-ion batteries is a cheap and ideal candidate for the high yield production of high-quality graphene. Attributed to the reduced interlayer force after repeated charge–discharge cycles, the sonication assisted exfoliation efficiency of the used anode graphite can be 3 to 11 times that of natural graphite, with a highest mass yield of the dispersed graphene sheets of ∼40 wt%. Importantly, the layer numbers of most of the exfoliated graphene sheets are 1–4 , and their lateral sizes are over 1 μm. Their conductivity after annealing at moderate temperature (500 °C) is up to 9100 S m−1, and their potential application in conductive ink was also demonstrated.

Graphical abstract: Direct exfoliation of the anode graphite of used Li-ion batteries into few-layer graphene sheets: a green and high yield route to high-quality graphene preparation

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Publication details

The article was received on 14 Jan 2017, accepted on 21 Feb 2017 and first published on 06 Mar 2017


Article type: Paper
DOI: 10.1039/C7TA00459A
Citation: J. Mater. Chem. A, 2017,5, 5880-5885
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    Direct exfoliation of the anode graphite of used Li-ion batteries into few-layer graphene sheets: a green and high yield route to high-quality graphene preparation

    X. Chen, Y. Zhu, W. Peng, Y. Li, G. Zhang, F. Zhang and X. Fan, J. Mater. Chem. A, 2017, 5, 5880
    DOI: 10.1039/C7TA00459A

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