37results about How to "Reduce reversibility" patented technology

A negative electrode material, a method for producing this material, and to a negative electrode and a lithium-ion battery comprising this material are described. The material comprises an active phase consisting of a material M based on Al, Si, Sn, Sb or a mixture thereof, and a support phase consisting of a material XaYbOc, where: O is an oxygen; Y is a cation with oxidation degree m=3, 4, 5 or 6; X is a cation with oxidation degree d=1, 2, 3, 4 or 5, X ensuring the electroneutrality of XaYbOc; and where: c is such that 2≦c≦10; b is such that 1≦b≦4; and a=(2c−bm) / d. An interface of mixed composition exists between the XaYbOc material and the active phase M, the interface consisting of the elements M, X, Y and O.

The invention relates to the technical field of fluorine chemicals and in particular relates to electron-grade hydrogen fluoride preparation procedures which are characterized by comprising an evaporation circulation oxidation reaction procedure, a circulating fluidized bed distillation procedure and a washing, absorption and condensation procedure.

The invention discloses a triangular paper folding device and method for paper jams and an automatic regulating mechanism. The automatic regulating mechanism comprises a conveyor belt, the triangular paper folding device, a mounting plate, a transmission component, a first drive device and a second drive device, wherein one end of the mounting plate is connected with the triangular paper folding device, and the other end of the mounting plate is connected with the transmission component; the transmission component is connected with the first drive device and the second drive device. The triangular paper folding device comprises a triangular paper folding block, a horizontal paper folding assembly and an oblique paper folding assembly, wherein the surface, needing to be turned over, of paper is turned over by 90 degrees through the triangular paper folding block, the paper continues to be turned over by 90 degrees by the horizontal paper folding assembly and the oblique paper folding assembly, and then paper folding is completed. The first drive device is used for regulating the horizontal position of the triangular paper folding device, and the second drive device is used for regulating the vertical position of the triangular paper folding device. The triangular paper folding device is simple in structure, low in cost, convenient and reliable to regulate and high in degree of automation, and improves the paper folding precision.

The invention relates to a carbon-supported nickel catalyst-doped Mg(BH4)2-based hydrogen storage material and a preparation method thereof, and belongs to the technical field of hydrogen storage materials for fuel cells. The preparation method comprises the following steps: 1, mixing: adding an additive into a matrix at a certain mass percentage, and mixing the matrix and the additive to obtain auniform mixture, wherein the matrix is Mg(BH4)2 powder, and the additive is a carbon-supported nickel catalyst; and 2, performing high-energy ball milling: adding the mixture obtained in the mixing step into a ball milling tank, and performing high-energy ball milling to obtain the hydrogen storage material. The preparation method has the advantages of easiness in purchasing or preparing the rawmaterials, and realization of simple and conveniently operated preparation process by adopting a high-energy ball milling technology; and the obtained material has the advantages of regular shape, uniform size, improved hydrogen release performance, realization of the initial hydrogen desorption temperature being lower than 130 DEG C, fast hydrogen desorption kinetic performances and improved reversibility.

A metal negative electrode secondary battery at least includes a positive electrode, a negative electrode, and an electrolyte. The negative electrode at least includes a support and a first metal. The support at least includes a carbon particle. The carbon particle is provided with a plurality of open pores. The first metal is held in the open pores. The first metal is an alkali metal or an alkaline earth metal. The negative electrode is configured to exchange an electron through dissolution reaction and deposition reaction of the first metal.