Scalable Functionalized Graphene Nano-platelets as Tunable Cathodes for High-performance Lithium Rechargeable Batteries

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High-performance and cost-effective rechargeable batteries are key to the success of electric vehicles and large-scale energy storage systems. Extensive research has focused on the development of (i) new high-energy electrodes that can store more lithium or (ii) high-power nano-structured electrodes hybridized with carbonaceous materials. However, the current status of lithium batteries based on redox reactions of heavy transition metals still remains far below the demands required for the proposed applications. Herein, we present a novel approach using tunable functional groups on graphene nano-platelets as redox centers. The electrode can deliver high capacity of similar to 250 mAh g(-1), power of similar to 20 kW kg(-1) in an acceptable cathode voltage range, and provide excellent cyclability up to thousands of repeated charge/discharge cycles. The simple, mass-scalable synthetic route for the functionalized graphene nano-platelets proposed in this work suggests that the graphene cathode can be a promising new class of electrode.
Publisher
NATURE PUBLISHING GROUP
Issue Date
2013-03
Language
English
Article Type
Article
Keywords

LI-ION BATTERIES; PHOSPHATE CATHODE; CARBON NANOTUBES; GRAPHITE OXIDE; STORAGE; ELECTRODES; FABRICATION; REDUCTION; NANOWIRES

Citation

SCIENTIFIC REPORTS, v.3

ISSN
2045-2322
DOI
10.1038/srep01506
URI
http://hdl.handle.net/10203/174857
Appears in Collection
MS-Journal Papers(저널논문)
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