Transition metal oxides are a class of anode materials for lithium ion batteries. They possess higher theoretical capacities than that of graphite and store charges through conversion reactions with lithium, within which electrochemical reduction leads to the transfer of at least two Li ions. Carbon coating is required for transition metal oxides in battery application. However, utilization of low cost and abundant metals such as Mn provides a variety of scalable electrode alternatives. Direct growth of nanomaterials on current collectors has several benefits such as sufficient empty space to accommodate the volume change, electrical contacts to the current collector, efficient charge transport, and no need of polymer binder and conductive carbon. We have deposited MnO nanoparticles directly on stainless steel by chemical vapor deposition (CVD) method using a volatile precursor material, Mn(acac)<sub>2</sub> (acac=acetylacetonate). As prepared, the material was characterized by powder x-ray diffraction and scanning electron microscope techniques. It possesses cubic MnO structure with a film thickness of 1 μm. Electrochemical charge-discharge experiments were carried out versus Li metal. High experimental capacity of ~975 mAh/g was achieved during the first cycle with high cyclability and an increase in capacity for subsequent cycles.

Direct growth of MnO nanoparticles on stainless steel and their electrochemical properties

251st National Meeting (2016)

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