High-rate oxygen evolution reaction on Al-doped LiNiO2.

Gupta, Asha; Chemelewski, William D; Buddie Mullins, C; Goodenough, John B · Adv Mater · 2015

basic_science · Level V

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Abstract

LiNi0.8 Al0.2 O2 with a higher Ni(3+) /Li(+) ordering, synthesized by the solution-combustion method, gives oxygen-evolution-reaction (OER) activity in alkaline solution that is comparable to that of IrO2 . This confirms that the octahedral-site Ni(IV) /Ni(III) couple in an oxide is an active redox center for the OER with -redox energy pinned at the top of the O-2p bands.