The invention relates to a nano composite fiber-reinforced gel polymer electrolyte and a preparation method thereof. Nano composite polymer fibers are grafted with a cross-linked polymer which has good compatibility with an electrolyte liquid, and adsorbs an ionic liquid-base electrolyte liquid to form a gel polymer electrolyte membrane taking the nanometer composite fibers as the framework, wherein the gel polymer electrolyte membrane has the advantages that the high temperature stability is good, and 10 S/cm order of magnitude room temperature ion electric conductivity and the liquid leakage ratio are low. The preparation method mainly sequentially comprises the four steps of dissolving PVDF and PMMA to obtain a spinning liquid, obtaining a nano composite SiO2/PVDF-b-PMMA polymer blend fibrous membrane, obtaining a (SiO2/PVDF-PMMA)-g-PMMA/SiO2 nano composite polymer membrane, and obtaining a nano composite fiber-reinforced gel polymer electrolyte. The preparation method does not need a radiation device to trigger or strong base treatment; the synthesis process is simple; the operation is convenient; the production technology process is short; the energy consumption is low; and the nano composite fiber-reinforced gel polymer electrolyte and the preparation method thereof are especially suitable for a power lithium-ion battery material and preparation thereof.

Nano composite fiber-reinforced gel polymer electrolyte and preparation method thereof

The invention discloses a metal-doped nano manganese dioxide electrode material and a preparation method thereof, and belongs to the field of chemical power supply. The method is characterized in that a metal-doped nano manganese dioxide electrode solid-soluble oxide Mn[1-x]MxO[2-y] with bar, tube, belt, wire and other shapes is synthesized by adopting a hydrothermal method, wherein x is more than 0 and less than or equal to 0.05, y is less than or equal to 2, M is a doped element which is an arbitrary one of Al, Sn, Li and Fe. The supercapacitor electrode material has high specific capacitance and stable working window in a neutral solution, and can be applied to power situations requiring neutral electrolyte, high stability and high power density. The process flow is simple, the preparation condition has good controllability, and the prepared element-doped manganese dioxide electrode material has high specific capacitance and good circulation stability.

Metal-doped nano manganese dioxide electrode material and preparation method thereof

The invention relates to a preparation method of a Ni1.5Co1.5O4 electrode material, which comprises the following steps: providing a nickel salt, a cobalt salt, hexamethylenetetramine, ethanol and water, wherein the mass ratio of the ethanol to the water is greater than 1:1 and less than or equal to 4:1; mixing the nickel salt, cobalt salt, hexamethylenetetramine, ethanol and water, and dissolving the nickel salt, cobalt salt and hexamethylenetetramine to obtain a mixed solution; carrying out solvothermal reaction on the mixed solution to obtain a precursor; and sintering the precursor in an oxygen-containing atmosphere to obtain the Ni1.5Co1.5O4 electrode material, wherein the Ni1.5Co1.5O4 electrode material is a plurality of three-dimensional flower-like structures which are self-assembled by Ni1.5Co1.5O4 nanosheets.

Preparation method of nickel cobalt oxide electrode material

The present invention relates to a composite diaphragm. The composite diaphragm comprises a non-woven fabric and organic polymer composite base material, and a composite gel compounded with the non-woven fabric and organic polymer composite base material. The non-woven fabric and organic polymer composite base material comprises a non-woven fabric and a cross-linked polymer, and the cross-linked polymer is formed by means of copolymerization of a polymer monomer containing alkenyl and alkoxy silane containing alkenyl in the presence of a catalyst and a cross-linking agent. The composite gel comprises a gel polymer and inorganic modified nano-powder, and the inorganic modified nano-powder comprises a polymer formed by means of copolymerization of methyl methacrylate and a silane coupling agent containing C=C groups and further comprises a nano-sol connected to the alkoxy silane by means of a condensation reaction. The present invention also relates to a preparation method for the composite diaphragm, and a lithium-ion battery.

Composite diaphragm and preparation method therefor, and lithium ion battery

The invention provides a preparation method of a coating membrane containing PVDF and a copolymer thereof. The method comprises the following steps of (1) preparing a modified polyolefin microporous membrane; (2) preparing modified ceramic powder; (3) preparing modified ceramic slurry; (4) preparing water-based mixed slurry; and (5) coating, namely coating one side of the modified polyolefin microporous membrane prepared in the step (1) with the modified ceramic slurry prepared in the step (3) according to a certain coating mode and drying in an oven of 40-100 DEG C to obtain a ceramic coating, coating the outer surface of the ceramic coating with the water-based mixed slurry prepared in the step (4) according to a certain coating mode and drying in the oven of 40-100 DEG C to obtain a water-based coating, and preparing the coating membrane containing the PVDF and the copolymer thereof. According to the preparation method, the heat stability of the membrane can be improved, the conductivity of a lithium battery is improved, the condition that the membrane can be kept stable in structure for a long period of time is ensured and the use security of the lithium battery is improved.

Preparation method of coating membrane containing PVDF and copolymer thereof

The invention relates to a composite diaphragm. The composite diaphragm comprises a non-woven fabric-organic polymer composite base material, and a composite gel compounded with the non-woven fabric-organic polymer composite base material, wherein the non-woven fabric-organic polymer composite base material comprises a non-woven fabric and a cross-linked polymer, and the cross-linked polymer is formed by copolymerization of a polymer monomer containing alkenyl and alkoxy silane containing alkenyl in the presence of a catalyst and a cross-linking agent; the composite gel comprises a gel polymer and inorganic modified nano powder, and the inorganic modified nano-powder comprises a polymer formed by copolymerization of methyl methacrylate and a silane coupling agent containing C=C groups, and further comprises a nano-sol connected with the alkoxy silane by virtue of condensation reaction. The invention also relates to a preparation method of the composite diaphragm and a lithium ion battery.

Composite diaphragm, preparation method thereof and lithium ion battery

The invention relates to a preparation method of spherical hydroxy cobalt oxide. The preparation method comprises the following steps of: providing a control crystallization kettle; feeding a buffer agent which is used for controlling the reaction speed of reactants into the control crystallization kettle; feeding a cobalt salt solution and an alkaline solution into the control crystallization kettle with the buffer agent, wherein a cobalt salt solution and an alkaline solution are used as the reactants; and only stirring the reactants within the bottom area of the kettle body of the control crystallization kettle while the reactants react with each other, so as to prepare the spherical hydroxy cobalt oxide by means of control crystallization method.

Preparation method of spherical hydroxy cobalt oxide

The invention provides an active material of a negative electrode of a lithium ion battery. The active material comprises a manganese dioxide nano tube. The invention provides a preparation method of the active material. The preparation method comprises the steps of mixing potassium permanganate, hydrogen chloride and a surfactant, polyvinylpyrrolidone, in water to form a mixed solution; and carrying out hydrothermal reaction on the mixed solution in a hydrothermal kettle at the reaction temperature of 120 DEG C-180 DEG C so as to generate the manganese dioxide nano tube. The invention provides the lithium ion battery. The active material of the negative electrode of the lithium ion battery comprises the manganese dioxide nano tube.

Lithium ion battery, active material of negative electrode thereof, and preparation method of active material

The invention relates to a preparation method of metal oxide The preparation method comprises the following steps: mixing a metal source with a solvothermal reaction medium and dissolving to form a first mixed solution, wherein the solvothermal reaction medium comprises water and polyalcohol difficultly dissolved in water; adding an additive into the first mixed solution for mixing and dissolving to form a second mixed solution, and performing solvothermal reaction on the second mixed solution to obtain a reaction product-metal oxide or a precursor, wherein the additive has an effect of promoting nucleus formation of metal oxide in the solvothermal reaction, and when the reaction product is the metal oxide precursor, the metal oxide precursor is further sintered to obtain metal oxide

Preparation method of metal oxide

The invention relates to a preparation method of lithium cobalt oxide. The preparation method comprises the following steps of: reacting reactants (cobalt salt solution and alkaline solution) according to a control crystallization method in a control crystallization kettle having a buffering agent under a stirring condition, so as to prepare spherical hydroxyl cobalt oxide; and putting the spherical hydroxyl cobalt oxide in lithium hydroxide solution, carrying out hydrothermal reaction in a hydrothermal reaction kettle so that hydrogen in hydroxyl cobalt oxide is displaced with lithium in lithium hydroxide, thus generating spherical lithium cobalt oxide.

Preparation method of lithium cobalt oxide

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