47results about How to "High oxygen ion conductivity" patented technology

An improved LSCF 6428 perovskite material of the type La12zSrx+zCo0.2+aFe0.8+bO3−δ wherein x=0.4, z=(0-0.1), a=(0.01-0.04), and b=(0.05-0.15) for use as an SOFC cathode having increased electronic and ionic conductivity. The general formula is similar to the prior art formulae (La0.6Sr0.4)1−zCo0.2Fe0.8O3−δ and La0.6Sr0.4Co0.2Fe0.8O3−δ but applies the z term to La and Sr independently as well as reducing the overall content of La. Further, by adding a small amount (a) of extra Co ions, catalytic activity, conductivity, and sinterability are further enhanced. Adding small amounts (b) of Fe and / or Fe and Co moderates the thermal expansion coefficient with no adverse effect on crystal structure or fuel cell performance. Improved sinterability, microstructure, and reduced film cracking result in high power density of fuel cells. An inherently low-cost solid state reaction method is described.

A solid oxide fuel cell provided with a power cell (1) in which a fuel electrode layer (4) is arranged on one surface of a solid electrolyte layer (3) and an air electrode layer (2) is arranged on the other surface thereof, wherein the solid electrolyte layer (3) has a two layer structure including a first electrolyte layer (3a) made of a ceria based oxide material and a second electrolyte layer (3b) made of a lanthanum gallate based oxide material, and the second electrolyte layer is formed on the side of the air electrode layer. It is preferable that the first electrolyte layer is formed thinner than the second electrolyte layer. According to such a configuration, there can be provided a solid oxide fuel cell comprising an inexpensive solid electrolyte layer which reduces the contact resistances in the interfaces between the solid electrolyte layer and the respective electrode layers, and thereby improves the generation efficiency. Additionally, by adopting a configuration in which the composition ratio of component materials in the fuel electrode layer (4) is graded along the thickness thereof, there can be provided a solid oxide fuel cell in which the generation characteristics of the power cell are improved and the durability of the solid oxide fuel cell is improved. Preferably, the material composition for the fuel electrode layer (4) is a mixture of Ni and CeSmO2, wherein the composition ratio of component materials is graded along the thickness thereof in such a way that the quantity of Ni is made less than the quantity of CeSmO2 near the boundary interface with said solid electrolyte layer, and the mixing ratio of Ni is gradually increased with an increasing distance away from the interface.

The invention provides a method for manufacturing a chip oxygen sensor. The method comprises the following steps of: adding a solvent, a plasticizing agent and a bonding agent into a substrate to obtain slurry; performing tape casting on the slurry; printing an inner electrode, an outer electrode, a protection layer, a heater and an insulating layer on the molded substrate respectively; cutting the printed substrate into single blank pieces respectively, and punching; printing conducting pins at the punched positions, and printing electrode pins on the blank pieces on one face printed with the outer electrode; connecting the conducting pins; and overlapping each single blank piece, performing heat pressing, and sintering at high temperature to form the chip oxygen sensor. Correspondingly, the invention provides a chip oxygen sensor manufactured by adopting the method. The chip oxygen sensor and the manufacturing method thereof have the advantages of simple process flow, high yield, fast response time, short activating time, high airtightness and the like.

A production method for producing a fuel cell, includes spinning a precursor consisting of a salt of at least one metal chosen from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Sr, Ba, Mn, Co, Mg, and Ga, a solvent, and a macromolecular polymer to produce nanofibers of the precursor containing the salt of the metal. The method further includes calcining the nanofibers of the precursor at a temperature ranging from 550° C. to 650° C. for 2 to 4 hours, and making a solid electrolyte material composed of the nanofibers obtained from the calcining. The resulting solid electrolyte material constitutes a part of a fuel cell.

The invention provides a high-temperature carbonized ceramic-based molecular sieve membrane oxygen generator and a method for using the same, which include sequentially connected air source inlets, an air compressor, a C-level filter, an air storage tank, and 3-5 high-temperature carbonized ceramic-based molecular sieve membranes. Molecular sieve adsorption unit, vacuum pump, oxygen gas storage tank, nitrogen gas storage tank, the end of the oxygen gas storage tank is provided with a first check valve, and the end of the nitrogen gas storage tank is provided with a second check valve; the vacuum pump is set on a high-temperature carbonized ceramic-based molecular sieve In the adsorption unit, the high-temperature carbonized ceramic-based molecular sieve adsorption unit communicates with the oxygen storage tank through an oxygen distribution pipeline, and the high-temperature carbonized ceramic-based molecular sieve adsorption unit communicates with the nitrogen gas storage tank through a nitrogen distribution pipeline. The oxygen generating device provided by the present invention has the molecular sieve of the adsorption tower of oxygen ion conductive carbonized ceramic-based molecular sieve membrane with good recycling rate, and absorbs and desorbs oxygen ions under high temperature and vacuum to efficiently separate oxygen and nitrogen to improve the purity of oxygen production.