37results about How to "Low ionic conductivity" patented technology

The present invention relates to a multi-layer structured composite electrolyte for a secondary battery and a secondary battery using the same. The multi-layer structured composite electrolyte of thepresent invention is prepared by laminating two or more layers of composite electrolyte containing a small amount of liquid electrolyte in addition to a mixture of a polymer and a ceramic material. The multi-layer structured composite electrolyte of the present invention has equal or superior electrochemical characteristics compared with a liquid electrolyte while having equal stability to the solid electrolyte. The multi-layer structured composite electrolyte of the present invention can also be used in wearable apparatuses since the multi-layer structured composite electrolyte can be arbitrarily folded.

The invention belongs to the field of metallurgy, and particularly relates to a molten steel dearsenication fluxing agent, and a preparation method and application method thereof. The molten steel dearsenication fluxing agent comprises the following components in percentage by mass: 88-95% of CaO, 5-12% of Li2O and the balance (0-5%) of impurity. After the molten steel is subjected to pre-deoxidation and desulfurization, [O] and [S] in the molten steel are respectively lowered to 0.001%; the dearsenication fluxing agent and aluminum-calcium alloy are added into a ladle together, wherein the addition amount of the dearsenication fluxing agent is calculated according to the principle that 10Kg of dearsenication fluxing agent can lower the arsenic content in every 100 ton of molten steel by 0.01%, and the addition amount of the aluminum-calcium alloy is 50 wt% of the dearsenication fluxing agent; and after dearsenication, the arsenic content in the molten steel is lowered to 0.001% below. Compared with the prior art, the dearsenication fluxing agent has the advantages of high dearsenication capacity, no pollution and high resource utilization ratio, and the dearsenication product does not pollute the molten steel, thereby solving the key problems in the existing dearsenication technique.

The invention relates to a lithium-air battery structure, comprising a lithium negative electrode, a porous diaphragm, and a positive electrode stacked in sequence, a conductive porous functional layer is arranged between the lithium negative electrode and the porous diaphragm, and the conductive porous functional layer is a conductive porous carbon material layer or In the composite layer of the conductive porous carbon material and the catalytic component, the mass ratio of the conductive porous carbon material to other functional components is 20:1-2:1. Through electrochemical reaction, the conductive porous functional layer can effectively consume dissolved and diffused oxygen or reactive oxygen species, reduce its corrosion and damage to the lithium anode, and greatly improve the battery stability.

The invention discloses a strongly basic polyarylether ionomer, a preparation method and application thereof. This kind of strongly basic polyarylether ionomer is a kind of polymer based on the polymerization of bis(4,4'-hydroxyphenyl)diphenylmethane and chlorine-containing or fluorine-containing aromatic monomers with Ar1 and Ar2 structures. Aromatic ethers are obtained through a series of functionalization processes including chloromethylation, quaternary ammonium salination and alkalization. The basic anion exchange membrane is obtained by casting a chloromethylated polyarylether solution into a membrane and undergoing a series of functionalization processes of quaternization and alkalization. The obtained basic anion exchange membrane has a good barrier effect on methanol, good physical and chemical properties, high thermal stability, and good conductivity at high temperature, which overcomes the unstable properties of the existing polyarylether anion exchange membranes. The low ion conductivity is suitable for alkaline ion exchange membranes in fuel cells and has broad application prospects.

The invention discloses a solid thin film electrolyte material and a preparation method thereof. The solid thin film electrolyte material has a structure as shown in the formula: Li-(Mn1-Xm1x)-(Til-yM2y)-O, wherein, 0<=x<=1, 0<=y<=1, M1 is selected from at least one of La, Sr, Na, Nd, Pr, Sm, Gd, Dy, Y, Eu, Tb and Ba, and M2 is selected from at least one of Mg, W, Al, Ge, Ru, Nb, Ni, Ta, Co, Fe, Zr, Hf, Fe, Cr and Ga. The solid thin film electrolyte material is obtained by using a sol-gel method or radio frequency magnetron sputtering method. The solid thin film electrolyte material has relatively high Li ion conductivity, relatively low electron conductivity and favorable thermodynamic stability, and is particularly suitable for producing solid lithium ion batteries.

The invention discloses a high-entropy alloy oxide and a preparation method thereof, alloy elements are Cu, Mn, Co, Fe and Ni, and a high-entropy alloy oxide coating is divided into three layers, namely a (Mn, Cu) 3O4 spinel layer, a Fe oxide layer and a NiCo oxide layer in sequence from outside to inside; the preparation method of the high-entropy alloy oxide comprises the following steps: mechanically ball-milling and mixing pure metal powder, carrying out plasma spraying on a CuMnCoFeNi high-entropy alloy coating, controlling the thickness of the coating to be 15-30m, and carrying out high-temperature and high-oxygen-pressure thermal growth to form a composite conductive oxide coating. The high-entropy alloy oxide coating prepared through the method is beneficial for inhibiting external diffusion of the Cr element in a ferritic stainless steel matrix, and the high-temperature oxidation resistance of a metal connector is improved; the high-entropy alloy oxide coating with high-concentration CuMnCo elements is applied to the surface of the ferritic stainless steel, so that the coating composite connector has high electron conductivity and low ion conductivity, and the high-temperature application performance of the fuel cell metal connector is improved.