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Aliovalent doping is widely adopted to tune the electronic structure of transition‐metal oxides for design of low‐cost, active electrocatalysts. Here, using single‐crystalline thin films as model electrocatalysts, the structure‐activity relationship of Fe states doping in perovskite LaNiO3 for oxygen evolution reaction (OER) is studied. Fe4+ state is found to be crucial for enhancing the OER activity...
As anodes of Li‐ion batteries, copper oxides (CuO) have a high theoretical specific capacity (674 mA h g−1) but own poor cyclic stability owing to the large volume expansion and low conductivity in charges/discharges. Incorporating reduced graphene oxide (rGO) into CuO anodes with conventional methods fails to build robust interaction between rGO and CuO to efficiently improve the overall anode performance...
In article number 1702667, Jie Xiong, Weidong He, and co‐workers synthesize high‐performance Cu2O/CuO/rGO through a facile single‐step hydrothermal method and employ it as an anode of a lithium‐ion battery, delivering remarkable energy capacity, rate capacity and thermal stability. In the cover, the two “magic” hands represent the 3D hierarchical network of rGO. The robust “magic” network mitigates...
The surface modified Ni(OH)2 samples with Ni and Ni–cobalt (Ni–Co) layer, respectively, are prepared by an in-situ chemical reduction method using hydrazine hydrate as reductant and silver ion as activating agent. The samples are characterized by X-ray diffraction, energy dispersive spectroscopy, and scanning electron microscopy. As the Ni electrode cathode, the material is analyzed, and the electrochemical...
A series of CoO/reduced graphene oxide (CoO/RGO) composites with different proportions are successfully synthesized via a hydrothermal method. As an additive for the nickel-based alkaline secondary battery cathode, the electrochemical performances of the proposed CoO/RGO composite are systematically investigated on its cyclic stability, rate capability, capacity recovery performance, cyclic voltammetry...
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