Provided herein are lithium-air battery cells comprising nanostructured (e.g., nanofiber) anode, cathode, and/or separator/electrolyte components.

A composite including an electrolyte layer containing solid oxide, and at least one electrode selected from a cathode disposed on one side of the electrolyte layer in a first direction and an anode disposed on the other side of the electrolyte layer in the first direction. Either one of two surfaces of the composite located on opposite sides in the first direction satisfies a first requirement that, as viewed in the first direction, a curvature determined on the basis of any three points juxtaposed at intervals of 5 mm is less than 0.0013 (l/mm) and that, as viewed in a second direction perpendicular to the first direction, the curvature is the reciprocal of the radius of an imaginary circle passing through the any three points.

A process for preparing a catalyst material, said catalyst material comprising a support material, a first metal and one or more second metals, wherein the first metal and the second metal(s) are alloyed and wherein the first metal is a platinum group metal and the second metal(s) is selected from the group of transition metals and tin provided the second metal(s) is different to the first metal is disclosed. The process comprises depositing a silicon oxide before or after deposition of the second metal(s), alloying the first and second metals and subsequently removing silicon oxide. A catalyst material prepared by this process is also disclosed.

Disclosed are an air electrode for lithium air batteries capable of increasing the lifespan of lithium air batteries and improving the output thereof by inhibiting the excessive growth of discharge products, and a method of manufacturing the same. Specifically, the air electrode for lithium air batteries includes a plurality of seeds including a nano-sized oxide particle, and a carbon web wrapping the seeds.

The present disclosure provides a method for manufacturing a membrane electrode assembly for a fuel cell in which a transfer failure is suppressed. The present disclosure relates to a method for manufacturing a membrane electrode assembly for a fuel cell, which comprises intermittently applying a catalyst ink on a substrate sheet and drying the catalyst ink to form a catalyst layer on the substrate sheet, and transferring the catalyst layer from the substrate sheet onto an electrolyte membrane. The catalyst ink contains catalyst particles, an ionomer, an alcohol, and water, and a water content in the catalyst ink is 57% to 61% by weight of a total weight of the catalyst ink.

A method for making nanoporous nickel composite material comprises: providing a cathode plate and a copper-containing anode plate, electroplating a copper material layer a surface of the cathode plate; laying a carbon nanotube layer on the copper material layer, and forming an overlapped structure of the copper material layer and the carbon nanotube laye; the cathode plate and the overlapped structure are used as a cathode, and a nickel-containing anode plate is used as an anode, plating a nickel material layer on the overlapped structure to form sandwich structure; repeating steps S1 to S3 to obtain a carbon nanotube-reinforced copper-nickel alloy; rolling and annealing the carbon nanotube-reinforced copper-nickel alloy; and etching the carbon nanotube-reinforced copper-nickel alloy to form the nanoporous nickel composite material.

The present invention provides a sulfur-based active material prepared using an inexpensive polymer material as a starting material and a method of preparing the sulfur-based active material. A non-aqueous electrolyte secondary battery such as a lithium-ion secondary battery provided with an electrode comprising the sulfur-based active material has a large charging and discharging capacity and an excellent cyclability.

The use of an electrocatalyst material in an anode catalyst layer, wherein the electrocatalyst material comprises a support material, the support material comprising a plurality of individual support particles or aggregates wherein each individual support particle or aggregate has dispersed thereon (i) first particles and (ii) second particles, wherein: (i) the first particles comprise Pt optionally alloyed with an alloying metal X1; wherein the optional alloying metal X1 is selected from the group consisting of Rh, Ti, Os, V, Co, Ni, Ga, Hf, Sn, Ir, Pd, Mo, Zn, W, Zr and Re; (ii) the second particles consist essentially of a second metal or a second metal compound wherein the second metal is selected from the group consisting of Ir and Ru and the second metal compound comprises IrX2 wherein X2 is selected from the group consisting of Ta, Nb, Ru, Ni and Co; and wherein if the first particles consist of Pt then the second particles do not comprise IrTa; and wherein if the first particles consist of Pt without alloying metal X1 and the second particles consist essentially of a second metal which is Ir, each individual support particle or aggregate of the support material of the electrocatalyst material has dispersed thereon only the said first and second particles; or wherein each individual support particle or aggregate has dispersed thereon (i) first particles and (ii) third particles, wherein: (iii) the third particles comprise Au or a third metal alloy; wherein the third metal alloy is selected from the group consisting of AuX3 and PdX4, wherein X3 is selected from the group consisting of Pt, Pd, Cu, Ir and Sn; and X4 is selected from the group consisting of Hg, Au, Sn, Co, Ni, Ga, In, Zn, W and Pb.

Disclosed are an electrolyte membrane of a membrane-electrode assembly including an electronic insulation layer, which greatly improves the durability of the electrolyte membrane, and a method of preparing the same. The electrolyte membrane includes an ion exchange layer and an electronic insulation layer provided on the ion exchange layer, and the electronic insulation layer includes one or more catalyst complexes, and a second ionomer Particularly, each of the one or more catalyst complex includes a catalyst particle and a first ionomer coated on the entirety or a portion of the surface of the catalyst particle, and the one or more catalyst complexes are dispersed the second ionomer.

The present invention provides a micro-porous layer which provides a fuel battery having high productivity, high power generation performance, and high durability. The present invention provides a micro-porous layer including fibrous carbohydrate having a fiber diameter of 5 nm-10 m and an aspect ratio of 10 or more. The carbohydrate has an oxygen/carbon element ratio of 0.02 or more.