Graphene/graphene-tube nanocomposites templated from cage-containing metal-organic frameworks for oxygen reduction in Li-O₂ batteries.

Li, Qing; Xu, Ping; Gao, Wei; Ma, Shuguo; Zhang, Guoqi; Cao, Ruiguo; Cho, Jaephil; Wang, Hsing-Lin et al. · Adv Mater · 2014

basic_science · Level V

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Abstract

Nitrogen-doped graphene/graphene-tube nanocomposites are prepared by a hightemperature approach using a newly designed cage-containing metal-organic framework (MOF) to template nitrogen/carbon (dicyandiamide) and iron precursors. The resulting N-Fe-MOF catalysts universally exhibit high oxygen-reduction activity in acidic, alkaline, and non-aqueous electrolytes and superior cathode performance in Li-O2 batteries.