41 results about "Bismuth fluoride" patented technology

The invention relates to a liquid phase synthetic Zr<4+> doped bismuth fluoride lithium-ion battery positive electrode material and a preparation method thereof. According to the method, reaction raw materials such as an ammonium fluoride solution and a bismuth salt solution are converted into tiny liquid droplets through the effect of a surfactant, and with the effect of a specific auxiliary agent and the centrifugal force field, the generated bismuth fluoride solid small particles are subjected to surface auxiliary agent covering and concurrently leave the reaction system, such that the possibility that the generated bismuth fluoride solid small particles continuously act with the ammonium fluoride to form a plurality of the double salts is substantially reduced; with the Zr<4+> doping, the overpotential of the material is reduced; and the bismuth fluoride material adopted as the lithium-ion battery positive electrode material has the specific capacity exceeding 200 mAh.g<-1>. According to the present invention, the method has characteristics of low equipment requirement and high product purity, the condition that a plurality of the double salts of the bismuth fluoride and other side reaction products are generated in the liquid phase reaction can be avoided, and the material has the excellent electrochemical property.

The invention relates to a solid-phase synthesis oxygen bearing bismuth fluoride anode material for a lithium ion battery and a preparation method of the solid-phase synthesis oxygen bearing bismuth fluoride anode material. The preparation method comprises the following steps: a quaternary ammonium salt taking fluoride as an anion is taken as a raw material, the raw material is in solid-phase synthesis into bismuth fluoride by steric hindrance of a macroradical and the action of a specific additive directly, and at the same time, oxygen permeates into a lattice in an ozone atmosphere, so that the electronic conductivity of material is improved greatly; high-purity bismuth fluoride is taken as a cathode material for a secondary battery, and has specific capacity exceeding 200 mAh.g<-1>. The preparation method is low in equipment requirement, the product is high in purity, reaction by-products such as various complex salts for producing bismuth fluoride in the solid-phase reaction can be avoided, and the solid-phase synthesis oxygen bearing bismuth fluoride anode material has excellent electrochemical performance.

The invention discloses a bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and having a B<3+> and La<3+> doped orthorhombic structure and a preparation method of the bismuth fluoride lithium ion cell anode material. According to the method, the orthorhombic-structure bismuth fluoride is prepared by taking a liquid phase reaction, designing the technological conditions and introducing a plurality of auxiliaries; the specific capacity and the electronic conductivity of the material are improved by doping B<3+> and La<3+>; when the bismuth fluoride material is used as the lithium ion cell anode material, the specific capacity of the bismuth fluoride material is higher than 200 mAh/g<-1>. The method is low in equipment requirement, high in product purity, capable of avoiding generation of multiple side reaction products, such as double salt, of bismuth fluoride in the liquid phase reaction, and excellent in electrochemical performance.

The invention discloses an Fe<2>O<3> and FeF<3-2x>O<x> gradient coated bismuth fluoride and copper fluoride dual-component composite lithium ion battery positive electrode material, and a preparation method therefor. According to the preparation method, poly-quaternary ammonium salt of different structures is taken as a template solid phase to prepare the bismuth fluoride and copper fluoride dual-component composite positive electrode material; according to the characteristic that FeF<3> is prone to be gradually oxidized into Fe<2>O<3> at a relatively high temperature, the exterior of the bismuth fluoride and copper fluoride dual-component composite positive electrode material is coated with FeF<3-2x>O<x> and the Fe<2>O<3> layer in sequence, wherein x is greater than 0 and less than 0.3, so as to improve the surface electron conductivity of the bismuth fluoride and copper fluoride dual-component composite positive electrode material in order to resist the harmful effect on the surfaces of the material granules from the organic electrolyte; and consequently, the comprehensive electrochemical performance of the bismuth fluoride and copper fluoride dual-component composite positive electrode material is greatly improved.

The invention relates to a solid phase synthetic Co<2+> doped bismuth fluoride lithium-ion battery positive electrode material and a preparation method thereof. According to the method, a quaternary ammonium salt adopting fluorine as anions is adopted as a raw material, the bismuth fluoride is subjected to direct solid-phase synthesis through the large group steric hindrance effect and through the effect of a specific auxiliary agent, and the electronic conductivity of the material is improved through the Co<2+> doping, wherein the bismuth fluoride material adopted as the lithium-ion battery positive electrode material has the specific capacity exceeding 200 mAh.g<-1>. According to the present invention, the method has characteristics of low equipment requirement and high product purity, the condition that a plurality of the double salts of the bismuth fluoride and other side reaction products are generated in the liquid phase reaction can be avoided, and the material has the excellent electrochemical property.

The invention discloses a Cu<2+> and Fe<3+> doped laminar bismuth fluoride lithium ion cell anode material prepared through liquid phase synthesis and a preparation method of the bismuth fluoride lithium ion cell anode material. According to the method, the laminar bismuth fluoride is prepared by taking a liquid phase reaction, designing the technological conditions and introducing a plurality of auxiliaries; the discharge platform voltage and the capacity retention performance of the material are improved by doping Cu<2+> and Fe<3+>; when the bismuth fluoride material is used as the lithium ion cell anode material, the specific capacity of the bismuth fluoride material is higher than 200 mAh/g<-1>. The method is low in equipment requirement, high in product purity, capable of avoiding generation of multiple side reaction products such as double salt of bismuth fluoride in the liquid phase reaction, and excellent in electrochemical performance.

The invention relates to a lithium battery cathode material with a Bi2O3/BiF<3-2x>O<x>/Zn<2+> and Mg<2+> doping bismuth fluoride layer structure and a preparation method of the lithium battery cathode material. With the characteristic that BiF3 is easily gradually oxidized to Bi2O3 in a relatively high temperature after Zn<2+> and Mg<2+> doping bismuth fluoride is synthesized by using a solid phase, a BiF<3-2x>O<x> layer (x is more than 0 and less than 0.3) and a Bi2O3 layer sequentially wraps Zn<2+> and Mg<2+> doping bismuth fluoride particles to improve surface electronic conductivity capability of the Zn<2+> and Mg<2+> doping bismuth fluoride and resist a harmful effect of an organic electrolyte on the surfaces of the material particles, and with the combination of Zn<2+> and Mg<2+> doping, the comprehensive electrochemical performance of bismuth fluoride is substantially improved.

The invention relates to a Fe<2>O<3>/FeF<3-2x>O<x> gradient cladding bismuth fluoride/ferric fluoride dual-constituent composite positive electrode material of a lithium battery and a preparation method of the composite positive electrode material. The bismuth fluoride/ferric fluoride dual-constituent composite positive electrode material is prepared through a solid phase by taking quaternary ammonium salts with different structures as template, FeF<3-2x>O<x> (x is more than 0 but less than 0.3) and a Fe<2>O<3> layer sequentially wrap the bismuth fluoride/ferric fluoride dual-constituent composite positive electrode material according to the characteristic that FeF<3> is easy to be gradually oxidized to Fe<2>O<3> in a relatively high temperature, so that the surface electron conductivity capability of the bismuth fluoride/ferric fluoride dual-constituent composite positive electrode material is improved, an adverse effect of an organic electrolyte on the surface of the material particle is resisted, so that the comprehensive electrochemical performance of the bismuth fluoride/ferric fluoride dual-constituent composite positive electrode material is substantially improved.

The invention discloses a continuous conduction in-situ C/Ag, metal solid solution/Mg<2+> doped BiF3 composite bismuth fluoride lithium ion battery positive electrode material and a preparation method. According to the method, in the drying process under low-temperature and high-vacuum conditions and the carbonization and in-situ reduction process under gas protection, a continuous carbon film of a hole and gap structure is formed, bismuth fluoride is fixedly formed on the carbon film and a certain amount of metal solid solution and silver are reduced in situ on the surfaces of bismuth fluoride particles, so that the electronic conductivity of the composite material is greatly improved; a homogeneous crystallization core is provided for the electrode material during discharging, and the kinetic blockage of new phase formation is reduced; the discharge ration rate is improved; Mg<2+> doping is further beneficial for reducing the crystal granularity of the discharge product; and moreover, various side reaction products such as double salts of bismuth fluoride are further prevented from being generated in a liquid-phase reaction, and the material has excellent electrochemical performance.

The invention relates to an absorption tower body material for a desulfurization and denitrification device. The absorption tower body material comprises the following components of, in parts by weight, 55-65 parts of aluminum-tin alloy, 17-31 parts of manganese, 16-27 parts of silicon nitride, 7-14 parts of bismuth fluoride, 5-10 parts of molybdenum fiber yarns with 3-6 meshes, 2-4 parts of perlite particles, 1-3 parts of ceramic fibers and 1-2 parts of potassium borohydride. The material is excellent in performance, high in strength, resistant to corrosion and reliable in operation.