Super-thin LiV3O8 nanosheets/graphene sandwich-like nanostructures with ultrahigh lithium ion storage properties

Abstract

With the thickness less than 5 nm, super-thin LiV3O8 nanosheets have already been successfully synthesized by transformation from super-thin V2O5·xH2O nanosheets, moreover, super-thin LiV3O8 nanosheets@graphene (LVO/G) sandwich-like layer-by-layer nanostructures were successfully obtained via a facile self-assembly method and annealing treatment. Such interesting LVO/G nanostructures as cathodes for lithium ion batteries not only show high capacity up to 397.2 mA h g−1 and outstanding rate capabilities (171 mA h g−1 at 10 C, 112 mA h g−1 at 15 C), but also present super-long cycle performance (301.2 mA h g−1 after 500 cycles at 1 C). As far as we known, the LVO/G cathodes exhibit ultrahigh lithium storage performances even much higher than those of previously reported literatures of LiV3O8, which demonstrates that such sandwich-like layer-by-layer LVO/G nanostructures is a potential candidate cathode material for the next generation of batteries.