114 results about "COBALTOUS CHLORIDE HEXAHYDRATE" patented technology

This patent uses cotton cloth as raw material, carbonizes it into carbon cloth, and obtains flexible supercapacitor electrode base material with high specific surface area, oxyge functional groups andgood mechanical properties then through mixed acidification treatment. The obtained treated carbon is added into ferric trichloride hexahydrate, Cobalt chloride hexahydrate, nickel chloride hexahydrate and ethanol solution after a period of time, ammonium bicarbonate is added and continuously stirred, after that reaction is completed, the mixture is washed with deionize water several times, dried, calcined in a high-temperature tubular furnace for a period of time, and taken out after the mixture is cooled to room temperature, so as to prepare an iron cobalt nickel oxide / carbon cloth composite flexible electrode material. By adjusting the reaction time and the amount of iron, cobalt and nickel sources to control the loading amount and morphology of multicomponent transition metal oxides,the flexible supercapacitor electrode materials with good flexibility and excellent electrochemical performance were prepared.

The invention discloses a preparation method of a phosphorus doped cobalt molybdate hydrogen evolution electrocatalyst and a product, and belongs to the technical field of electro-catalysis hydrogen evolution. The method comprises the following steps: (1) separately adding cobalt chloride hexahydrate, ammonium molybdate tetrahydrate and urea in deionized water, and stirring to form a uniform mixedsolution; (2) transferring the solution prepared in step (1) in a reaction kettle, adding a conductive substrate, and carrying out hydrothermal reaction to obtain beta-phase cobalt molybdate precursor material; (3) placing a sample prepared in step (2) in a tube furnace, and carrying out high-temperature thermal treatment in a nitrogen atmosphere to obtain beta-phase cobalt molybdate; and (4) carrying out phosphating on the sample prepared in step (3) in a nitrogen atmosphere to obtain phosphorus doped cobalt molybdate, wherein a reagent for phosphating is sodium hypophosphite. According to the method, by control over the amount of the sodium hypophosphite and the pyrolysis time, phosphorus is successively blended in crystal lattices of cobalt molybdate, and the prepared catalyst has efficient hydrogen evolution capability in an alkaline solution.

The invention discloses a preparation method of different morphologies of cobalt monoxide nanometers loaded with foam nickel. The preparation method comprises: placing sheet-like foam nickel in an ultrasonic washing machine, washing, placing the washed foam nickel in a drying box, and drying; dispersing cobalt chloride hexahydrate powder into a dispersion solvent added with urea, and magneticallystirring at a room temperature to form a suspension; transferring the suspension to a high-pressure hydrothermal reaction kettle, obliquely placing the dried sheet-like foam nickel into the high-pressure hydrothermal reaction kettle, sealing the high-pressure hydrothermal reaction kettle, placing the high-pressure hydrothermal reaction kettle into the drying box, carrying out thermal insulation for 15-18 h at a temperature of 160-200 DEG C, and naturally cooling to a room temperature; taking the foam nickel out of the high-pressure hydrothermal reaction kettle, placing into the ultrasonic washing machine, washing, placing into a vacuum drying box, and drying to obtain a precursor; and calcining the precursor for 3-4 h at a calcination temperature of 400-520 DEG C.

The invention discloses a preparation method for a self-support ferrocobalt phosphide nanosphere electrocatalyst, and relates to the preparation method of the electrocatalyst. The preparation method comprises the steps that firstly, commercial cobalt chloride hexahydrate, ferric trichloride hexahydrate, ammonium fluoride and urea are weighed, a nickel net is adopted, then the weighed reagents aremixed and stirred to obtain a mixed reagent, a reaction is conducted for some time in a reaction kettle, and a precursor is obtained; the obtained precursor is calcined in a tube furnace, and CoFeP isobtained. The preparation method is low in cost, the preparation technology is simple, ferrocobalt phosphide nanospheres have the larger specific surface areas, and more active sites are exposed. When the molar ratio of an iron source to a cobalt source is 1:2, the reaction is conducted for 10 hours in a drying oven, the ferrocobalt phosphide nanospheres have good stability and good catalytic activity, no other adhesive agents are needed, and electron transmission is increased. The preparation method is applied to the field of fossil fuel.

The invention provides a protein-based carbon / magnetic Fe Co nanoparticle composite wave-absorbing agent and a preparation method and application thereof, and belongs to the technical field of wave-absorbing materials. The preparation method of the protein-based carbon / magnetic Fe Co nanoparticle composite wave-absorbing agent comprises the following steps: 1) mixing water, ferric chloride hexahydrate, ferrous chloride tetrahydrate and cobalt chloride hexahydrate, and reacting for 1-2 h at the temperature of 70-100 DEG C to prepare magnetic nanoparticles; 2) mixing the magnetic nanoparticles with egg white liquid, and curing to obtain a protein-magnetic nanoparticle compound; 3) carbonizing the protein-magnetic nanoparticle compound obtained in the step 2) to obtain the protein-based carbon / magnetic Fe Co nanoparticle composite wave-absorbing agent. The material prepared by using the composite wave-absorbing agent has strong wave-absorbing performance, meanwhile has the characteristicsof wide wave-absorbing frequency band, small matching thickness of an absorber and the like, and has a large application prospect in the field of wave-absorbing materials.

The invention discloses a preparation method of a supercapacitor electrode material with good electrochemical performance, which takes a carbon cloth as a flexible substrate and grows a transition metal double hydroxide on the substrate. The invention particularly relates to a novel method for preparing a carbon-based nickel-cobalt double hydroxide supercapacitor electrode material by carbonizingcotton cloth at high temperature and growing nickel-cobalt double hydroxide on the carbonized cotton cloth by a one-step hydrothermal method, wherein the carbon-based nickel-cobalt double hydroxide supercapacitor electrode material is prepared by a hydrothermal method. The invention comprises the following specific steps: At first, that cotton cloth is carbonize at high temperature to obtain carbon cloth, weighing a proportion of nickel chloride hexahydrate and cobalt chloride hexahydrate, and mixed with hexamethylenetetramine, Dissolved in appropriate amount of deionized water, carbon cloth or active treated carbon cloth is completely immersed in the mixed solution, stirred for a certain time, then Ni-Co double hydroxide is grown on the carbon cloth under hydrothermal conditions, and thecarbon cloth after reaction is washed and dried to obtain Ni-Co double hydroxide supercapacitor electrode material with carbon cloth as a flexible substrate.

The invention relates to a preparation method of an ultralow platinum-loading capacity Pt-CoP / C anode electrocatalyst for a high-activity high-stability direct methanol fuel cell, and belongs to the technical field of fuel cells. The preparation method comprises the following steps: dispersing a carrier and cobalt chloride hexahydrate into water, carrying out ultrasonic dispersion, stirring, and then evaporating to obtain a first composite carrier; mixing and grinding the first composite carrier and sodium hypophosphite hydrate, reacting for 1 hour, and washing and drying to obtain a second composite carrier; dispersing the second composite carrier into ethanediol, adding chloroplatinic acid, carrying out the ultrasonic dispersion, and stirring to obtain a first suspension liquid; stirring the first suspension liquid at room temperature, regulating a pH value through sodium hydroxide to obtain a second suspension liquid; carrying out microwave radiation on the second suspension liquid, and washing and drying to obtain the loading type platinum catalyst. The platinum catalyst prepared by adopting the preparation method disclosed by the invention has very high catalytic activity and stability on methanol electrooxidation and can be used for reducing the loading capacity of noble metal platinum. The preparation method disclosed by the invention has the advantages of easiness for operation, short preparation period and suitability for large-scale production.

The invention discloses a preparation method of a cobalt nanosphere. The preparation method comprises the following steps: 1) preparing a solution A by dissolving cobalt chloride hexahydrate and a surfactant in mixed liquor of deionized water and absolute ethyl alcohol; preparing a solution B by dissolving sodium hydroxide in deionized water; preparing a solution C by dissolving sodium borohydride in deionized water; 2) mixing the solution A, the solution B with the solution C to be a reaction solution, and transferring the reaction solution to a high pressure autoclave, and performing a hydrothermal reaction to obtain the cobalt nanosphere, wherein through controlling the reaction conditions, the diameter of the cobalt nanosphere can be controlled within 250-900 nm. The preparation method has the characteristics of easiness in obtaining of raw material, simple equipment, low cost, simplicity in operation, high efficiency, quickness and the like. The prepared cobalt nanosphere has the advantages of normalized shape, uniform grain diameter, good dispersibility, controllable size, high productivity, good stability, and suitability for large-scale industrial production. The cobalt nanometer material can be widely applied to the fields of magnetic recording material, magnetic fluid, permanent magnets, wave-absorbing material, hard alloy, catalytic material, ceramics, solar cells and the like.

The invention provides a preparing method for an oxide dispersion strengthening iron-cobalt-nickel medium-entropy alloy. A dispersion strengthening phase is yttrium oxide. Ferric trichloride hexahydrate serves as an iron source, cobalt chloride hexahydrate serves as a cobalt source, nickel chloride hexahydrate serves as a nickel source, yttrium nitrate hexahydrate serves as a yttrium source, a sodium hydroxide solution serves as a precipitator, and iron, cobalt, nickel and yttrium ions generate corresponding hydroxide coprecipitation. Then, obtained precipitation is washed, dried and roasted,and ferric hydroxide, cobaltous hydroxide, nickelous hydroxide and yttrium hydroxide in the precipitation are decomposed into corresponding oxide. The roasted oxide powder is subjected to high-temperature reducing in the hydrogen atmosphere, and since yttrium oxide cannot be reduced, the mixture powder of iron, cobalt, nickel and yttrium oxide is finally obtained. The obtained powder is sintered,and the oxide dispersion strengthening iron-cobalt-nickel medium-entropy alloy is obtained.

The invention relates to a preparation method of cobalt sulfide / three-dimensional nitrogen-doped macroporous graphene and a negative electrode material of a lithium ion battery in the field of electrode materials. According to the preparation method, firstly, urea serving as a nitrogen source and graphene oxide are adopted for forming three-dimensional nitrogen-doped macroporous graphene; secondly, with cobalt chloride hexahydrate as a cobalt source, thiourea as a sulfur source and a mixture of ethylene glycol and water as a solvent, a simple solvothermal method is adopted for in-situ synthesis of a CoS / 3DNMG composite material, wherein the CoS / 3DNMG composite material is used as an active material of a negative electrode of the lithium ion battery. According to the CoS / 3DNMG composite material prepared by means of the method, CoS is uniformly loaded on the pores and surface of three-dimensional nitrogen-doped macroporous graphene; the rich pore structures of three-dimensional nitrogen-doped macroporous graphene effectively buffer the volume expansion of cobalt sulfide in the charging and discharging process, transfer paths of electrons and ions are shortened in the charging and discharging process, and the migration rate of the lithium ions is increased; more defects are introduced into lattices of three-dimensional macroporous graphene through doping of nitrogen atoms, and the electrode reaction can be accelerated.

The invention discloses a novel chemical synthesis method for preparing mecobalamine. The novel chemical synthesis method comprises the steps of: dissolving cyanocobalamin and cobalt chloride hexahydrate in deionized water to obtain reaction liquid, simultaneously dropwise adding a sodium borohydride aqueous solution and a methanol / formaldehyde solution to the reaction liquid, and generating mecobalamine in one step through reductive methylation. According to the novel chemical synthesis method, the cyanocobalamin is taken as a raw material, and the mecobalamine is synthesized in one step; and therefore, the novel chemical synthesis method is simple in operation and has low requirements on equipment, little pollution and wide application prospect, and conditions are easy to control.

The invention relates to a treating fluid for treating nitric oxide in a waste gas, wherein the treating fluid is prepared from a reactant, a complexing catalyst and desalted water; the reactant is selected from one of ammonium hydroxide or urea or a combination of two; the complexing catalyst is formed by preparing a complexing agent or transition metal salt, wherein the complexing agent is selected from one out of or the combination of diethylenetriamine, triethylene tetramine, tetraethylenepentamine, pentaethylenehexamine or polyethyleneimine; the transition metal salt is selected from one out of or the combination of cobalt-nitrate hexahydrate (II) or cobalt chloride hexahydrate (II); the concentration of the reactant in the treating fluid is 1-20%(w%); the concentration of the complexing catalyst in the treating fluid is 1-100mmol / L. The treating fluid for treating nitric oxide in waste gas as well as the treating method which are provided by the invention are high in treating efficiency, discharge no waste fluid, and cannot generate secondary pollution; the treating method is a low-input, environment-friendly and efficient nitric oxide treating technique, and has wide popularization and application values.

The invention discloses a nickel-cobalt-iron ternary metal oxide nano tubular composite material and a preparation method thereof. The preparation method comprises the steps of firstly, pre-treating and drying a carbon fiber fabric; preparing a mixed solution of cobalt chloride hexahydrate, nickel chloride hexahydrate, hexadecyl trimethyl ammonium bromide and urea by using distilled water as a solvent, putting the mixed solution and the carbon fiber fabric into a reactor for hydrothermal reaction, thus obtaining a NiCo2O4 precursor; and adding ferric chloride hexahydrate into the prepared precursor for water bath reaction, thus finally obtaining a NiCo2-xFexO4 nano tubular composite material. Because the prepared composite material has a tubular structure and is a nano particle, the specific surface area of the material is greatly increased, the electrode reaction kinetics is accelerated, and the super capacitive property of the material is improved. The composite material has excellent reversibility and cyclic stability. The preparation method is simple in operation and low in cost, and has a broad application prospect in the fields of energy storage, crystals and the like.

A chain of hollow nanoparticles made of polycrystal noble metal (Au, Pd, or Pt) is prepared through dissolving polyvinyl pyrrolidone in inertial gas and uniform magnetic field while stirring, adding hexahydrated cobalt chloride powder, dropping the aqueous solution of sodium bromohydride, adding the solution of AuCl3, PdCl6 or PtCl6 to obtain coarse product, and purifying.

The invention discloses a nitrogen-doped graphene / cobalt-zinc ferrite composite aerogel wave-absorbing material and a preparation method thereof. Firstly, ferric chloride hexahydrate, zinc chloride and cobalt chloride hexahydrate are used as metal sources, ethylene glycol is used as a solvent, cobalt-zinc ferrite particles are prepared through a solvothermal method, then graphene oxide (GO) is used as a template, ethylenediamine is used as a nitrogen-doped reagent, and the nitrogen-doped graphene / cobalt-zinc ferrite composite aerogel material is prepared through a hydrothermal method. The method is simple to operate, green and environment-friendly, and does not generate any toxic substances. The prepared composite aerogel material is high in electromagnetic wave absorption capacity, wide in absorption frequency band, low in filling ratio and small in matching thickness. Electromagnetic waves of different wave bands can be effectively absorbed by adjusting the nitrogen doping amount ofthe composite aerogel and the thickness of a wave absorbing agent, and the composite aerogel has important application value in the fields of electromagnetic absorption and electromagnetic shielding.

The invention discloses a cobalt vanadate and reduced graphene oxide composite negative electrode material and a preparation method thereof. The preparation method comprises the steps of adding graphene oxide and ammonium metavanadate into deionized water, and carrying out ultrasonic dispersion, adding lithium hydroxide monohydrate and cobalt chloride hexahydrate under a water bath condition at the temperature of 80 DEG C and performing stirring for 10 minutes to obtain a mixed solution, and then carrying out a hydrothermal reaction at 180 DEG C for 10 minutes, and performing centrifuging anddrying, and performing calcining on the dried product in an inert atmosphere to obtain a product. By adoption of the preparation method, the prepared cobalt vanadate and reduced graphene oxide composite negative material has very high cycling stability and rate performance, the synthesis method is simple and easy to operate, the reaction time is short, and the cost is relatively low, and the negative electrode material is expected to become a novel negative electrode material for large-scale use.

The invention discloses a mononuclear fluorine-substituted bimetal phthalocyanine complex / activated carbon lithium thionyl chloride battery catalytic material and a preparation method thereof. 4-fluorophthalic anhydride, cobalt chloride hexahydrate, copper chloride dehydrate, pitch coke activated carbon and urea which are as raw materials and ammonium molybdate which is used as a catalyst are uniformly ground in a glass mortar and then are placed in a muffle furnace for solid phase sintering to obtain a target product. The method has a simple preparation process, low cost, easily controlled preparation conditions, a short synthesis cycle and uniform compositions. The composite material prepared by the method can increase the ion activation surface area and accelerate electron transport. The high specific surface area of the pitch coke activated carbon, the certain catalytic properties of a pore structure and a microcrystalline structure and the mutual competition and synergistic effects of the bimetal affect the catalytic performance of the composite material together, improve the electrochemical performance of the lithium thionyl chloride electrode material, and reduce contact resistance between interfaces.

The invention discloses a Co-doped ZnO gas-sensitive nano-material preparation method, a product of the nano-material and an application of the nano-material. Ammonium bicarbonate is placed into a three-mouth flask 1, and 50mL of water is added into the three-mouth flask 1. Zinc acetate and cobalt chloride hexahydrate are placed into a three-mouth flask 2, and 50mL of water is added into the three-mouth flask 2. The zinc acetate can be replaced by zinc chloride or zinc nitrate with equal molar weight. After the three-mouth flask 2 is heated to reach a certain temperature, the three-mouth flask1 is heated, generated gas is led into solution in the three-mouth flask 2, and reaction is performed to generate precipitates. The precipitates are filtered, washed, dried and then placed into a muffle furnace for roasting to obtain the Co-doped ZnO gas-sensitive nano-material. The preparation method has the advantages that the preparation method is simple, reaction temperature is low, Co dopingamount can be controlled, and the Co-doped ZnO gas-sensitive nano-material prepared by the preparation method is high in purity, uniform in size and short in gas-sensitive response and recovery time.

The invention discloses a preparation method of a purple ceramic pigment with a cobalt-silicon olivine structure. The preparation method comprises the following steps: tetraethoxysilane and cobalt chloride hexahydrate are taken as main raw materials to prepare sol under the water-bath heating condition according to different cobalt-silicon ratios, and the sol is calcined within the wider temperature range of 1000-1300 DEG C through adding a mineralizer and adjusting the pH value of the system, so that the purple ceramic pigment with the Co2SiO4 olivine crystal structure is obtained. Compared with the traditional solid-phase method, the synthetic method has the characteristics of being simple in technology, low in equipment requirement, convenient to operate, and low in synthesis temperature, the ball milling process is not required, and the pollution caused by impurities is avoided, so that the preparation method has a wide market space.

The invention provides a method for preparing a super-hydrophobic fabric@nickel and cobalt double hydroxide composite material and its application. The method comprises the following steps that cotton fabric is taken, washed to be clean with ethyl alcohol and deionized water and dried in a drying oven for use; nickel chloride hexahydrate, cobalt chloride hexahydrate, hexadecyl trimethyl ammonium bromide and urea are dissolved into the deionized water, mixed liquor A is obtained and transferred into a three-neck flask, a piece of fabric is put into the flask, and microwave treatment is conducted; after reacting is conducted, a product is taken out, washing is conducted with ethyl alcohol, drying is conducted, and fabric@nickel and cobalt double hydroxide is obtained; fabric@nickel and cobalt double hydroxide is immersed in an ethyl alcohol solution of stearic acid, oscillation is conducted in an oscillator at room temperature, and the super-hydrophobic fabric@nickel and cobalt double hydroxide composite material is obtained. The preparation method is simple and easy to operate, short in flow, capable of controlling operation easily and suitable for application and popularization.

The invention discloses a trinuclear cobalt complex and a preparation method thereof. The structure of the trinuclear cobalt complex is shown in the figure 1 in the specification. The trinuclear cobalt complex is prepared from m-phthalic acid-5-sodium sulfonate, 4-phenylpyridine and cobalt chloride hexahydrate through a hydrothermal method, and m-phthalic acid-5-sodium sulfonate and 4-phenylpyridine serve as ligand. The advantages of being simple in process, low in cost, good in repeatability and the like are achieved, and certain bases are provided for synthesis of a transition metal complex.

The invention relates to a preparation method of a polypyrrole-coated three-dimensional graphene Co3O4 lithium battery negative electrode material. The preparation method comprises the steps of preparing graphene oxide by a Hummers method, and purifying; dissolving the graphene oxide and (K3[Co(CN)6]) in deionized water for uniform mixing; adding (CoCL<2>.6H2O), and performing uniform mixing; adding ((NH4)2S2O8) and pyrrole, and performing stirring and mixing; and placing the obtained product in a tubular furnace, performing heating and calcination in air, and cooling to a room temperature toobtain the polypyrrole-coated three-dimensional graphene Co3O4. Compared with the prior art, the preparation method has the advantages that favorable experiment data and theoretical support are provided for the application of a graphene-based high-molecular polymer-coated metal organic framework composite material in an aspect of a lithium ion battery electrode material.

The invention discloses a fluorine-substituted cobalt phthalocyanine / activated carbon Li / SOCl2 battery catalytic material and a preparation method thereof, 4-fluorophthalic anhydride, cobalt chloridehexahydrate, asphalt coke activated carbon and urea as raw materials and ammonium molybdate as a catalyst are uniformly ground in a glass mortar, and then put into a muffle furnace for solid-phase sintering to obtain the fluorine-substituted cobalt phthalocyanine composite activated carbon catalytic material. The method has the advantages of simple preparation process, low cost, easy control of preparation conditions, short synthesis period, uniform composition and the like. The fluorine-substituted cobalt phthalocyanine composite material prepared by the method can form conductive networks communicated with each other, meanwhile, controllable ordered pores are provided as a micro reaction space, a reaction active site can be at as a central ion, and also can be at a benzene ring connectedwith a fluorine substituent group, the specific surface area of the asphalt coke activated carbon is high, and the pore structure and the microcrystalline structure have certain catalytic performance, so that the discharge time of an electrode material is prolonged, and the interface resistance is effectively reduced.

The invention relates to the field of molybdate and provides a preparation method of a cobalt molybdate powder material adopting a hollow ball structure. The preparation method comprises the following steps: using a dispersant to repeatedly wash yeast powder, and then using an activating agent to reactivate the yeast powder to obtain yeast cells; adding cobalt chloride hexahydrate and stirring for 2-4 h at the temeprature of 40-60 DEG C to enable the yeast cells to fully adsorb cobalt ions, and then adding sodium molybdate dihydrate, stirring at the constant temperature of 35-50 DEG C to obtain a purple sediment; seasoning the solution for 6-14 h at the temperature of 20-30 DEG C, centrifugally separating and drying the purple sediment; calcining the dried powder, and cooling to the room temperature to obtain cobalt molybdate micrometer-sized hollow balls. The hollow-ball powder has the average size of (2.0-4.5)*(1.5-4.0) mum, are about 100-400 nm in wall thickness, and is provided with a hollow part to accommodate a great amount of guest molecules to produce the wrapping effect, thereby achieving excellent physicochemical performance and wide application range.

The invention discloses a nano tubular NiCo2S4@titanium carbide composite material and a preparation method and application thereof. The nano material takes nickel chloride hexahydrate as a nickel source, takes cobalt chloride hexahydrate as a cobalt source, and employs a two-step hydrothermal method. The method comprises the steps: preparing a nano tubular precursor by a first hydrothermal method, wherein at the moment, the two materials are compounded together by the precursor; vulcanizing the precursor through secondary hydrothermal treatment, wherein the material compounds Ti3C2 of a single sheet layer with hollow tubular NiCo2S4 for the first time to prepare a NiCo2S4@titanium carbide composite material, and the NiCo2S4@titanium carbide composite material is applied to research of electrochemical performance of a supercapacitor, and loading modified Ti3C2 on a NiCo2S4 hollow tube to provide an additional electron transmission path, thereby improving the electron transmission efficiency. Experiments show that compared with a single electrode material, the NiCo2S4 and titanium carbide composite electrode material has more excellent specific capacitance and cycle performance.

The invention discloses a method for preparing a Co3O4 nanoribbon. The method comprises the following steps: by taking water as a reaction medium, taking cobalt chloride hexahydrate and urea as raw materials, reacting under water bath conditions, centrifuging and washing the obtained product, and drying, thereby obtaining a controllable ribbon-shaped Co(CO3)0.5(OH).0.11H2O precursor with regular morphology; putting the dried precursor into a muffle furnace, heating to a certain temperature at a certain heating speed, preserving the temperature, and totally converting the precursor into Co3O4, wherein the ribbon structure is not damaged, and the morphology is kept good. The method disclosed by the invention has the advantages that the size, structure and morphology of the Co3O4 nanoribbon prepared by the method are easily controlled, and the prepared Co3O4 nanoribbon has good gas-sensitive and photodegradable performances; and moreover, the preparation method is simple, convenient, easy to operate, low in cost and high in yield, and industrial production is easily realized.

The invention relates to the technical field of solar cells, and discloses an amorphous cobalt-nickel-matrix chalcogenide film as well as a preparation method and an application thereof. The amorphouscobalt-nickel-matrix chalcogenide film is prepared from an electroplating solution which is prepared from double metal sources, a sulfur group source and an additive through an electrochemical deposition method, wherein the double metal sources are cobalt chloride hexahydrate and nickel chloride hexahydrate; if amorphous cobalt-nickel-matrix chalcogenide is amorphous cobalt-nickel-matrix sulfide,the sulfur group source is thiourea, the additive is an ammonia water solution, and the electrochemical deposition method is a reverse constant-voltage electro-deposition technology; and if the amorphous cobalt-nickel-matrix chalcogenide is amorphous cobalt-nickel-matrix selenide, the sulfur group source is selenium dioxide, the additive is potassium chloride, the molar ratio of cobalt ions to nickel ions in the electroplating solution is 1: 1 to 2: 3, and the electrochemical deposition method is a constant-voltage electro-deposition technology. The amorphous cobalt-nickel-matrix chalcogenidefilm prepared by the method is excellent in electro-catalytic property, and high in electroconductivity and stability.

The invention provides a method for preparing a reagent cobalt chloride hexahydrate. The method comprises the following steps of: reacting a metal cobalt slice with a concentrated nitric acid so as to generate a cobalt nitrate, directly reducing the cobalt nitrate by using formaldehyde in the condition of the esistence of hydrochloric acid so as to remove the nitrate radical to generate a cobalt chloride solution, filtering, concentrating and cool crystallizing so as to acquire the cobalt chloride hexahydrate. The method of the invention generates no other impurities except the target products, gas and water in the reaction process, and can obtain pure cobalt chloride hexahydrate. The products acquired by using the method meet the analytically pure standard of GB / T 1270-1996 chemical reagent cobalt chloride hexahydrate. The method has the advantages of simple operation, rapid reaction, short producing flow, high production efficiency, mild process condition, easily controlled property and application in mass commercial process.

The invention discloses a cobalt molybdate composite carbon dot lithium ion battery positive electrode material and a preparation method thereof. A cobalt molybdate precursor is generated by sinteringammonium molybdate and cobalt chloride hexahydrate as raw materials; and then a nano-particle structure with a bulge is formed by inducing oriented growth of cobalt molybdate by utilizing carbon dotsthrough a hydrothermal method so as to obtain the cobalt molybdate composite carbon dot lithium ion battery positive electrode material. The method has the characteristics of simple preparation process, short period, low energy consumption, good repeatability, high yield and the like; the cobalt molybdate composite material prepared with the method can alleviate the volume expansion and enlarge the ion activation surface area; and due to the existence of the carbon dots, certain pseudocapacitance can be produced, so that the specific capacity and the energy density of the material are improved.