Catalyst-free Direct Growth of a Single to a Few Layers of Graphene on a Germanium Nanowire for the Anode Material of a Lithium Battery


  • This work was supported by the National Research Foundation of Korea (NRF) grant funded by MEST (grant numbers 2012-003040, 2012-053500, 2012-0009599, and 2010-00285), KOSEF through EPB center (grant number 2012-00000526), and ITRC by the MKE Korea (grant number 1415123286). The authors thank Hyun Jin Park in NCNT for his technical assistance in TEM analysis.


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Direct growth of a single to a few layers of graphene on a germanium nanowire (Gr/Ge NW; see picture) was achieved by a metal-catalyst-free chemical vapor deposition (CVD) process. The Gr/Ge NW was used as anode in a lithium ion battery. This material has a specific capacity of 1059 mA h g−1 at 4.0 C, a long cycle life over 200 cycles, and a high capacity retention of 90 %.