Graphene-coated pyrogenic carbon as an anode material for lithium battery

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[1] [1,Zhang, Ming
[2] Gao, Bin
[3] Li, Ying
[4] Zhang, Xiangwu
[5] Hardin, Ian R.
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Gao, B. (bg55@ufl.edu) | 1600年 / Elsevier B.V., Netherlands卷 / 229期
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In this work; cotton fibers and pyrene-dispersed graphene sheets were used to produce graphene-coated pyrogenic carbon as an anode material for lithium battery. The graphene sheets were wrapped around the cotton fibers by simply dipping the fabric in a graphene/pyrene-derivative suspension. And then the cotton/graphene textile was annealed at 700°C in a quartz tube furnace under Ar flow conditions. During the annealing process; the gaps between separated graphene sheets were soldered by glue molecules (aromatic molecular surfactant) to form graphene-coated pyrogenic carbon. Because of the unique electric properties of the graphene skin on the pyrogenic carbon; the flexible graphene-coated pyrogenic carbon showed relatively large storage capacity to lithium. Galvanostatic charge-discharge experiments also showed that the graphene-coated pyrogenic carbon electrode provided a reversible discharge capacity as high as 288mAhg-1 even after 50 cycles and thus can be used an anode material in lithium battery. © 2013 Elsevier B.V.;
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