Rechargeable Li-ion full batteries based on one-dimensional Li-rich LiMnNiO cathode and nitrogen-doped carbon-coated NiO anode materials.

To meet the increasing requirements of lithium-ion batteries (LIBs) as energy sources for mobile electronic devices and electric vehicles, great efforts are being made to develop cathode and anode materials with high specific capacity and lifetime stability. Herein, we report a Li-rich one-dimensional (1D) LiMnNiO (0.3LiMnO·0.

An N-doped porous carbon network with a multidirectional structure as a highly efficient metal-free catalyst for the oxygen reduction reaction.

Metal-free catalysts have gained substantial attention as a promising candidate to replace the expensive platinum (Pt) catalysts for the oxygen reduction reaction (ORR) which is a key process in low temperature fuel cells. Development of highly efficient and mass-producible N-doped carbon catalysts, however, remains to be a great challenge. In this study, N-doped porous carbon (NPC) materials were synthesized via a simple, cost-effective and scalable method for mass production by using the d-gluconic acid sodium salt, pyrrole, Triton X-100 and KOH.

Honeycomb-Like Nitrogen-Doped Carbon 3D Nanoweb@Li S Cathode Material for Use in Lithium Sulfur Batteries.

Current lithium-ion batteries have a low theoretical capacity that is insufficient for use in emerging electric vehicles and energy-storage systems. The development of lithium-sulfur batteries utilizing Li S cathodes would be a promising option to overcome the capacity limitation. In this work, new three-dimensional (3D) honeycomb-like N-doped carbon nanowebs (HCNs) have been synthesized through a facile aqueous solution route for use as a cathode material in lithium-sulfur batteries.

Bifunctional Hybrid Catalysts with Perovskite LaCoFeO Nanowires and Reduced Graphene Oxide Sheets for an Efficient Li-O Battery Cathode.

In this paper, bifunctional catalysts consisting of perovskite LaCoFeO nanowires (LCFO NWs) with reduced graphene oxide (rGO) sheets were prepared for use in lithium-oxygen (Li-O) battery cathodes. The prepared LCFO@rGO composite was explored as a cathode catalyst for Li-O batteries, resulting in an outstanding discharge capacity (ca. 7088.

Fabrication of three-dimensional ordered macroporous spinel CoFeO as efficient bifunctional catalysts for the positive electrode of lithium-oxygen batteries.

Three-dimensionally ordered macroporous (3DOM) CoFeO (CFO) catalysts were prepared by using the colloidal crystal templating method to be used as bifunctional catalysts of Li-O battery positive electrodes. In order to study the relationship between the macropore diameter and charge/discharge behavior, 3DOM CFO catalysts with two different pore diameters of 140 and 60 nm were prepared. The physicochemical properties of the 3DOM CFO catalysts were investigated by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy.

Ultrathin amorphous α-Co(OH)2 nanosheets grown on Ag nanowire surfaces as a highly active and durable electrocatalyst for oxygen evolution reaction.

Ultrathin α-Co(OH)2 nanosheets, prepared via simple hydrolysis at room temperature, were directly grown on Ag nanowires. The catalyst exhibited improved activity for the oxygen evolution reaction, with a reduced onset overpotential (220 mV) and superior durability because of the enhanced electron conductivity and stability of Ag nanowires in alkaline media.

Exploring the effects of the size of reduced graphene oxide nanosheets for Pt-catalyzed electrode reactions.

Pt-supported reduced graphene oxide (Pt/RGO) catalysts were prepared over the RGO sheets with different sizes for methanol oxidation and oxygen reduction reactions in acidic media. The Pt on the smaller RGO presented higher catalytic activities than the Pt on the larger RGO and the commercial Pt/C catalyst.

MnCo2O4 nanowires anchored on reduced graphene oxide sheets as effective bifunctional catalysts for Li-O2 battery cathodes.

A hybrid composite system of MnCo2 O4 nanowires (MCO NWs) anchored on reduced graphene oxide (RGO) nanosheets was prepared as the bifunctional catalyst of a Li-O2 battery cathode. The catalysts can be obtained from the hybridization of one-dimensional MCO NWs and two-dimensional RGO nanosheets. As O2 -cathode catalysts for Li-O2 cells, the MCO@RGO composites showed a high initial discharge capacity (ca.