1613 results about "Nickel oxide" patented technology

The invention provides a lithium ion battery and electric equipment, the lithium ion battery comprises a positive pole piece and an electrolyte, active substances in the positive pole piece comprise a phosphate lithium positive pole material and nickel cobalt manganese lithium oxide, and the electrolyte comprises a positive pole film-forming agent, a negative pole film-forming agent and a lithium salt, the lithium salt comprises lithium hexafluorophosphate and lithium bis (fluorosulfonyl) imide, the lithium ion battery meets the following formula: # imgabs0 #, NL is the mass ratio of the lithium nickel cobalt manganese oxide to the lithium phosphate positive electrode material, Salt is the sum of the molar concentrations of the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide in the electrolyte by taking mol / L as the unit, and the sum of the molar concentrations of the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide in the electrolyte is the sum of the molar concentrations of the lithium hexafluorophosphate and the lithium bis (fluorosulfonyl) imide. Add is the mass ratio of the positive electrode film-forming agent to the negative electrode film-forming agent. When the ternary material is doped in the lithium manganese iron phosphate or the lithium iron phosphate, the proportion of the positive and negative electrode film-forming agents and the proportion of the heat-resistant high-lithium salt can be adjusted according to the mixing proportion of the lithium manganese iron phosphate and the lithium iron phosphate, so that the cycle performance of the battery is improved.

The invention discloses a negative temperature coefficient medium-entropy thermistor material as well as a preparation method and application thereof. According to the invention, manganese dioxide, nickel oxide, cobalt sesquioxide, zinc oxide and copper oxide are used as raw materials, and a solid-phase reaction method is adopted to prepare the negative temperature coefficient medium-entropy thermistor material with a chemical formula of (NiX1CoX2ZnX3CuX4) Mn2O4. Wherein the values of X1, X2, X3 and X4 are 0.075-0.425, and X1 + X2 + X3 + X4 = 1. The negative temperature coefficient medium-entropy thermistor material is of a single spinel structure. The material has the hysteresis diffusion effect of medium-entropy ceramic, and by combining the coordinated optimization effect of multiple components, the material constant and the resistivity of the thermal sensitive ceramic can be remarkably reduced, and the anti-aging performance can be improved.

The invention belongs to the technical field of energy storage materials, and particularly relates to a high-entropy oxide Fe0. 2Co0. 2Ni0. 2Cu0. 2Zn0. 2O and an ultrafast synthesis method and application thereof. According to the preparation method, ferroferric oxide, cobalt oxide, nickel oxide, copper oxide and zinc oxide with equal molar ratio are adopted as direct synthesis raw materials, toxic gases such as chlorine and nitrogen dioxide generated in the synthesis process of a metal salt precursor are avoided, and the uniformly distributed single-phase high-entropy oxide is synthesized in an ultrafast manner within 10 seconds by using a Joule heating technology; the synthesized high-entropy oxide is used as a lithium ion battery negative electrode material, and shows more excellent electrochemical performance and cycling stability compared with other high-entropy oxides prepared from transition metals with different proportions; in the preparation process, extra additives are not needed, operation is easy, the synthesis speed is high, the yield is high, element distribution is uniform, and the method has the advantages of being low in cost, high in efficiency and free of pollution and has the industrialization prospect.

The invention relates to a catalytically graphitized silicon-carbon composite material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: providing a porous carbon precursor, sequentially carbonizing, activating and pore-forming, pickling, washing to be neutral, passivating to remove impurities, and then crushing and grading to obtain a porous carbon substrate with the particle size D50 of 5-20 microns; adding a graphitization catalyst into the porous carbon substrate for blending, and carrying out heat treatment at 800-1000 DEG C for 2-6 hours for catalytic modification to obtain modified porous carbon; and putting the obtained modified porous carbon into a chemical vapor deposition reaction furnace, and depositing silicon particles to obtain the catalytically graphitized silicon-carbon composite material. Wherein the graphitization catalyst comprises any one or more of potassium ferrate, iron oxide, nickel oxide, boron, aluminum, titanium, Fe-Si alloy and P-Ni alloy. The graphite catalyst is added to perform catalytic graphitization modification on the porous carbon substrate, so that the energy density, the cycle life and the rate capability of the battery are remarkably improved, and the application requirements of the high-performance battery are met.

The present disclosure relates to a recycled positive electrode active material, a method of producing the recycled positive electrode active material, and a secondary battery including the same. The recycled positive electrode active material, including: 60 mol % or more of Ni; and crystalline LiF, or 0.24% by weight or less of residual Li2CO3, where the recycled positive electrode active material is one or more selected from the group consisting of a lithium nickel oxide (LNO)-based positive electrode active material, a nickel·cobalt·manganese (NCM)-based positive electrode active material, a nickel·cobalt·aluminum (NCA)-based positive electrode active material, and a nickel·cobalt·manganese·aluminum (NCMA)-based positive electrode active material.

The invention relates to the technical field of thermal insulation materials, and discloses a hollow glass bead as well as a preparation method and application thereof. The hollow glass beads are prepared from the following components in percentage by weight: 40 to 65 percent of silicon dioxide, 5 to 15 percent of boron oxide, 5 to 15 percent of sodium oxide, 2 to 8 percent of cuprous oxide, 1 to 5 percent of barium oxide, 2 to 10 percent of chromic oxide, 3.5 to 7.5 percent of nickel oxide, 1.5 to 3 percent of tin oxide and 1 to 5.5 percent of silicon carbide. Cuprous oxide, barium oxide and chromic oxide have high reflection coefficients, and heat absorption of buildings can be reduced; nickel oxide, tin oxide and silicon carbide have high radiation coefficients, heat can be dissipated into outdoor air in an infrared radiation mode, and therefore the temperature of the outer surface of a building is reduced. Cuprous oxide can significantly improve the surface cleanliness of the coating and enhance the thermal insulation performance of the coating.

The invention provides a vertical structure ultraviolet photoelectric detector and a preparation method thereof. The ultraviolet photoelectric detector is of a vertical structure, the design facilitates light absorption of the ultraviolet photoelectric detector, the light utilization rate of the ultraviolet photoelectric detector is improved, and compared with a horizontal structure, the transmission distance is shortened, and the cost is low; the ultraviolet photoelectric detector provided by the invention has a relatively high switching ratio of light and dark current and relatively small dark current, and also has a very high response speed under the condition of keeping the switching ratio of light and dark current and the dark current; a PN junction is formed between the nickel oxide hole transport layer and the beta-phase gallium oxide single crystal, so that the ultraviolet photoelectric detector has self-driving performance; in the manufacturing process, the substrate is used as a supporting frame, and the extraction electrode is packaged in one step through the conductive adhesive tape, so that 3-5 photoetching steps of a traditional horizontal structure are omitted, the process is simplified, and the process manufacturing is simpler.

The invention relates to the field of energy storage battery materials, in particular to a high-entropy alloy coated single crystal nickel-rich cobalt-free positive electrode material and a preparation method thereof.The preparation method comprises the following steps that S1, nano nickel oxide, nano manganese oxide and LiOH.H2O are ground and mixed to be uniform, and mixed powder is obtained; s2, uniformly stirring and mixing the mixed powder and the high-entropy alloy precursor solution, performing vacuum drying, and performing first-stage sintering in an oxygen atmosphere; the high-entropy alloy precursor solution is a metal salt solution containing aluminum, titanium, molybdenum, manganese and nickel metal ions; and S3, carrying out second-stage sintering, naturally cooling to room temperature, and grinding to obtain the high-entropy alloy coated single-crystal nickel-rich cobalt-free positive electrode material. The preparation process of the high-entropy alloy coated single crystal nickel-rich cobalt-free positive electrode material is simple, the high-entropy alloy coated layer can improve the conductivity, the power and the energy density performance, the growth of primary particles can be promoted by two-stage calcination, the rate capability is excellent, and the cycle performance is stable.

The invention relates to a low-temperature graphite negative electrode material and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the prepared low-temperature graphite negative electrode material, firstly, the surface of graphite is pre-oxidized through potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, and then under the action of sodium nitrate, potassium permanganate and hydrogen peroxide, graphite oxide is prepared; then, ammonium molybdate hydrate and thioacetamide are used as a molybdenum source and a sulfur source, graphite oxide is used as a supporting material, a molybdenum disulfide-graphite compound is synthesized, and the conductivity and the cycling stability are improved; secondly, the surface of the negative electrode is coated with amorphous resin carbon / nickel oxide, so that the ion diffusion efficiency of the low-temperature graphite negative electrode material is enhanced, and the electrochemical lithium storage performance is improved in a low-temperature environment; and finally, the surface of the amorphous resin carbon / nickel oxide is coated with a layer of polythiophene film, so that the rate capability of the negative electrode material is improved due to large surface area and high pores.

The invention relates to the technical field of electrochromism coating, in particular to an electrochromism device coating process and method, and the electrochromism device coating process comprises the following steps: step 1, substrate pretreatment: cleaning attachments on the surface of a flexible substrate through ultrasonic cleaning and plasma treatment; step 2, conducting layer deposition treatment: depositing an indium tin oxide (ITO) conducting layer on the substrate at the deposition temperature of 100-380 DEG C, the thickness of 200-350 nm and the vacuum degree of less than or equal to 10 <-5 > Pa; step 3, electrochromic layer deposition treatment: sequentially depositing a tungsten oxide (WO3) layer and a nickel oxide (NiO) layer through a magnetron sputtering process, and controlling the film thickness ratio of NiO to WO3 to enable the ratio of NiO / W to be 0.25-0.357; 4, annealing treatment is conducted, specifically, annealing is conducted for the first time at the temperature of 200-500 DEG C, and the annealing time is 200-300 seconds; and secondary annealing is conducted, specifically, annealing is conducted at the temperature of 400 DEG C, and the annealing time ranges from 200 seconds to 800 seconds. The effect of improving the yellow ground color of the electrochromic device is achieved.

The invention discloses a method for controlling ion concentration and volume balance in an electrolyte by using nickel hydroxide. The method comprises the following steps: preparing a reaction base solution containing a first complexing agent and a first alkali; the first anolyte, a second complexing agent solution and a second alkali solution are simultaneously added to the bottom of the reaction base solution for stirring reaction, solid-liquid separation is performed after nickel hydroxide reaches the target particle size, and filtrate and a filter cake are obtained; washing the filter cake, and slurrying the filter cake by using a second anolyte to obtain a nickel hydroxide slurrying material; and adjusting the sodium ion concentration, pH and nickel ion concentration of the third anolyte by adopting a sodium hydroxide solution, a nickel hydroxide slurrying material and a nickel sulfate solution to obtain the catholyte. According to the invention, a feeding mode of feeding at the bottom is adopted, and a complexing agent is matched, so that crystals can stably grow and are convenient to filter; in the preparation process, aging and too high pH conditions are not needed, operation is simpler, labor intensity is small, the reaction rate is higher, and continuous treatment of the anolyte can be achieved.

An electrocatalyst electrode having a strut lattice structure fabricated of a polymer and a composite disposed on the strut lattice structure that includes at least one transition metal oxide, which may include copper oxide, cobalt oxide, or nickel oxide. The composite and the strut lattice structure are 3D and free-standing. The electrocatalyst electrode includes one or more pores that are vertically aligned to form channels and to facilitate bubble release. The composite is used for alkaline hydrogen evolution reaction (HER) and oxygen evolution reaction (OER).

The application provides a method for grading diesel deep hydrodesulfurization catalysts, which comprises the following steps: loading catalysts containing AlPO4-5 phosphorus aluminum molecular sieves and catalysts containing ETS-10 titanium silicon molecular sieves in the upper and lower parts of a fixed bed hydrogenation reactor respectively according to a loading mass ratio of 1:3-3:1, so that diesel is subjected to hydrodesulfurization reaction through catalysts containing AlPO4-5 phosphorus aluminum molecular sieves first and then through catalysts containing ETS-10 titanium silicon molecular sieves; the carrier of the catalysts containing AlPO4-5 phosphorus aluminum molecular sieves comprises AlPO4-5 phosphorus aluminum molecular sieves and aluminum oxide powder, the carrier of the catalysts containing ETS-10 titanium silicon molecular sieves comprises ETS-10 titanium silicon molecular sieves and aluminum oxide powder, and the active components of the two kinds of catalysts respectively comprise a combination of two or three of nickel oxide, molybdenum oxide and cobalt oxide. The sulfur content of the hydrogenated diesel obtained through the method can be as low as 10 μg / g or below.

The invention discloses a preparation method of a high-capacity lithium iron manganese phosphate cathode material. In the method of the invention, by doping nickel and modifying polyethylene glycol, the intrinsic conductivity of the material is improved. At the same time, the lattice distortion caused by doping inhibits the growth of grains, improves the grading of particles, shortens the diffusion path of lithium ions. Meanwhile, nickel in nickel and fluorine modified polyethylene glycol can form nickel oxide on the surface of carbon sources such as carbon black or carbon fiber, which promotes the electron and ion transport between the cathode material and the electrolyte to a certain extent, improves the energy density and cycle performance of the battery. Fluorine can improve the interfacial composition between the carbon source and the cathode material, promote the transfer and diffusion of lithium ions, and improve the charge / discharge rate and capacity retention of the battery. Therefore, doping nickel and modifying polyethylene glycol in the invention have a synergistic effect. Especially when the molar amount of doped nickel is 0.02, the prepared battery has a high capacity and excellent rate performance.

The invention discloses conductive paste, a conductive electrode, a preparation method of the conductive electrode and a crystalline silicon solar cell, and belongs to the technical field of photovoltaic cells, the conductive paste comprises glass powder, silver, nickel and an organic carrier, the glass powder comprises B2O3, corrosive oxide and non-corrosive oxide, and the nickel is added to replace part of silver, so that the usage amount of silver in the conductive paste is reduced, and the cost is reduced. In addition, the molar ratio range of the corrosive oxide and the non-corrosive oxide in the glass powder is limited to be 0.7-2.6. The first passivation layer arranged on the boron diffusion emitter is opened during high-temperature sintering, and the oxidability and the flowability of the glass powder can be balanced to inhibit or delay the formation of an oxidized nickel shell on the surface of the nickel powder, so that a laser enhanced contact post-treatment process is matched; and the photoelectric conversion efficiency of the crystalline silicon solar cell is ensured.

The invention relates to the technical field of new energy, in particular to an extensible composite hole transport layer and a perovskite solar cell based on the extensible composite hole transport layer, and a preparation method of the perovskite solar cell comprises the following steps: forming a nickel oxide film on transparent conductive glass through magnetron sputtering; soaking the nickel oxide thin film to form a self-assembled monomolecular layer; forming a perovskite active layer on the self-assembled monomolecular layer; forming an electron transport layer on the perovskite active layer; and forming an electrode on the electron transport layer. According to the method, the preparation size of the hole transport layer can be expanded, and the photoelectric conversion efficiency of the perovskite solar cell can be improved.

The invention discloses a preparation method of a composite lithium-rich and lithium-supplement additive, which comprises the following steps: taking lithium ferrite as a core, preparing NiO (at) lithium salt by adopting an ALD atomic deposition method, fully and uniformly mixing carbon-coated lithium ferrite and the NiO (at) lithium salt, and sintering to prepare the composite lithium-rich and lithium-supplement additive. According to the invention, the advantages of high lithium supplement capacity of lithium ferrite, less gas production of lithium nickelate and good environmental adaptability are fully exerted, and the lithium supplement agent with high capacity and good stability is obtained; the nanometer nickel protoxide is in full contact with a lithium salt coating layer prepared by an ALD method, subsequent sintering is facilitated, preparation can be performed at a lower temperature, cost reduction is facilitated, meanwhile, the nickel protoxide and the peripheral lithium salt coating layer are subjected to a solid solution reaction, and residual lithium on the surface of lithium ferrite of a nuclear body can be obtained. The'two-channel lithium acquisition mode 'can reduce the overall residual alkali amount of the material, and is beneficial to improving the processing performance of subsequent battery slurry.

The invention relates to the technical field of new energy materials, in particular to a metal oxide heterojunction catalyst and a preparation method and application thereof in hydrogen peroxide production. The preparation method comprises the following steps: taking soluble zinc salt and urea as raw materials, carrying out hydrothermal reaction to obtain zinc oxide, then taking soluble nickel salt and zinc oxide as raw materials, carrying out coprecipitation reaction under the action of ammonium bicarbonate, and calcining in air to obtain the metal oxide heterojunction catalyst. The preparation steps are simple and convenient, the product is prepared in the air atmosphere, in the obtained metal oxide heterojunction catalyst, the surfaces of the zinc oxide microspheres are uniformly coated with the nickel oxide nanosheets, the specific surface area is large, the number of active sites is large, the nickel oxide nanosheets and the zinc oxide microspheres form a heterojunction structure, and the metal oxide heterojunction catalyst has good catalytic activity. The defects of a catalyst for producing hydrogen peroxide through electro-catalysis water oxidation and a preparation method in the prior art are overcome.

The invention belongs to the technical field of metal powder materials, and particularly relates to a method for coating nickel powder with barium titanate, which comprises the following steps: preparing an inner shell of nickel oxide and / or sulfide; dispersing the nickel powder with the inner shell in the dispersion liquid; sequentially adding a barium compound and a titanium compound into the dispersion liquid; the nickel powder with the inner shell and the barium compound and the titanium compound adsorbed on the surface is dried, and the barium compound and the titanium compound on the surface react to form a barium titanate coated outer shell; and dispersing the dried coated powder to form the barium titanate coated nickel powder with the double-shell structure. According to the nickel powder with the double-shell structure prepared by the technical scheme, the co-firing property of the nickel powder and a dielectric material is improved through the barium titanate shell of the outer shell, the combination degree of nickel and the dielectric material can be better improved through the nickel oxide and / or the nickel sulfide of the inner shell, and the dielectric property of the dielectric material is improved. Therefore, the yield of the nickel powder and the dielectric material in the process of preparing the electronic component is improved, and the electrical property of the electronic component is improved.

Disclosed in the present application are a perovskite thin film layer (4) and a preparation method therefor, and a perovskite silicon stacked solar cell and a preparation method therefor. The perovskite thin film layer (4) comprises a perovskite buried modification layer (41) stacked on the surface of a nickel oxide hole transport layer (3) in the perovskite solar cell as well as a perovskite light absorption layer (42) stacked on the surface of the perovskite buried modification layer (41), wherein the perovskite buried modification layer (41) is doped with hydrazine and / or hydrazine derivatives.

The invention provides a wet treatment process for laterite-nickel ore. The wet treatment process comprises the following steps: S1, carrying out acid leaching treatment on the laterite-nickel ore by adopting inorganic acid to obtain leached ore pulp; s2, the leached ore pulp is sequentially subjected to liquid-solid separation and countercurrent washing, and washed pulp and leached residues are obtained; s3, a first oxidizing agent and a first neutralizing agent are added into the washed slurry for iron and aluminum removal treatment, and a solution with iron and aluminum removed and iron and aluminum slag are obtained; s4, carrying out nickel and cobalt precipitation treatment on the solution subjected to iron and aluminum removal, so as to obtain precipitated slurry; s5, continuously carrying out dense separation treatment on the precipitated slurry to obtain underflow and overflow; and S6, the underflow is subjected to washing aftertreatment in sequence, and a cobalt nickel hydroxide product is obtained. The invention provides a short-process wet treatment process for laterite-nickel ore, the production cost and energy consumption are reduced, and meanwhile, the recovery rate of nickel and cobalt, the overall recovery rate of scandium and the quality of nickel-cobalt oxide products are improved.

The invention discloses an alkaline electrolyzed water diaphragm based on nickel oxyhydroxide and a preparation method and application of the alkaline electrolyzed water diaphragm, and relates to the technical field of composite diaphragms.The alkaline electrolyzed water diaphragm is prepared through a phase inversion method, and nanometer nickel oxyhydroxide NiOOH particles are selected as inorganic nanometer filler; the mass percent of the nickel oxyhydroxide in the membrane casting solution is 15-30%. A strong chemical bond formed by nickel ions and hydroxyl in the hydroxyl nickel oxide crystal endows the material with excellent structural stability, and the material shows excellent solubility resistance, hydrolysis resistance and structural collapse resistance in a strong alkaline electrolysis environment and can tolerate high-concentration OH <-> erosion for a long time; meanwhile, the intrinsic high-oxidation-resistance characteristic is achieved.

The present disclosure relates to a recycled positive electrode active material, a method of producing the recycled positive electrode active material, and a secondary battery including the same. The recycled positive electrode active material, including: 60 mol % or more of Ni, 250 mg / kg or less of fluorine (F), and having a crystallite size of 122 nm or less, where the recycled positive electrode active material is one or more selected from the group consisting of a lithium nickel oxide (LNO)-based positive electrode active material, a nickel·cobalt·manganese (NCM)-based positive electrode active material, a nickel·cobalt·aluminum (NCA)-based positive electrode active material, and a nickel·cobalt·manganese·aluminum (NCMA)-based positive electrode active material.

The invention discloses a method for preparing a hole transport layer of a perovskite solar cell by direct-current sputtering of a metallic nickel target, which comprises the following steps of: performing direct-current sputtering twice by using the metallic nickel target in atmospheres with different oxygen contents to form a bottom-layer nickel oxide film and a top-layer nickel oxide film; and carrying out annealing treatment, supercritical fluid treatment and alkali metal halide salt surface passivation to prepare the nickel oxide hole transport layer for the perovskite solar cell. According to the method, the large-area hole transport layer can be prepared, and the photoelectric conversion efficiency of the perovskite solar cell can be improved.

The invention discloses a process for treating nickel wastewater containing nickel acetate cleaning water and nickel acetate concentrated water, which comprises the following steps: S1, filtering nickel wastewater, S2, carrying out primary concentration treatment, S3, carrying out secondary concentration treatment, S4, treating by a sodium metaaluminate method, S5, carrying out collaborative filtration treatment, and S6, discharging RO (Reverse Osmosis) produced water up to the standard. The method comprises the following steps: primarily enriching nickel ions by adopting primary nickel concentration treatment and secondary nickel concentration treatment, adding a sodium metaaluminate solution into a mixed solution, enabling the pH value of the mixed solution to be 8-12, enabling the nickel ions to react with hydroxyl ions to generate a nickel hydroxide precipitate, adding a sulfuric acid solution to adjust the pH value of the mixed solution back to 6.5-7.5, hydrolyzing sodium metaaluminate to generate an aluminum hydroxide precipitate, and carrying out secondary nickel concentration treatment on the aluminum hydroxide precipitate; aluminum hydroxide adsorbs nickel hydroxide to form a composite precipitate, aluminum ions and nickel ions are subjected to a competitive complexation reaction, and a flocculating agent is added into a mixed solution to form a flocculent precipitate, so that the reaction time is short, the nickel content in the nickel sludge can be greatly increased, the treatment period can be shortened, and the operation cost can be reduced.

According to the present invention, when preparing a hydrogenation catalyst including nickel as an active ingredient, the reduction of nickel can be facilitated by using copper and sulfur as a promoter. In particular, the present invention can provide a catalyst which, while having a high nickel content, includes sulfur oxide and nickel oxide in a particular range, and thus exhibits even higher selective reduction degree for olefins while having high activity of the catalyst.

The invention provides a nickel-based supported catalyst, a preparation method and application thereof, and a carbon dioxide methanation method, and belongs to the technical field of catalysts. The nickel-based supported catalyst provided by the invention comprises a carrier and nickel oxide supported on the surface and in pore channels of the carrier, the carrier comprises carbonate and / or citrate. The carbonate and / or citrate are / is used as the carrier, the nickel-based supported catalyst is synthesized by adopting a solution combustion method, the nickel-based supported catalyst has larger specific surface area and smaller particle size, the nickel oxide and the carrier have a stronger mutual combination effect, the nickel-based supported catalyst has excellent stability, and CO2 methanation can be catalyzed for a long time under a low-temperature condition. The nickel-based supported catalyst is combined with the low-temperature plasma, so that CO2 methanation can be catalyzed at normal temperature and normal pressure, and the catalyst has high CO2 conversion rate and CH4 selectivity.

The invention discloses a preparation method of a nickel-based catalyst and the nickel-based catalyst. The preparation method of the nickel-based catalyst comprises the following steps: S1, completely dissolving an acid source, cerium salt and a solvent; s2, carrying out hydrothermal reaction on the solution obtained in the step S1; s3, carrying out solid-liquid separation on the product obtained in the step S2, and washing, drying and calcining the obtained solid product to form a carrier which is cerium dioxide derived from a metal organic framework; s4, an active component is loaded on the carrier, and the active component is metallic nickel or nickel oxide. According to the preparation method of the nickel-based catalyst, the nickel-based catalyst with relatively high specific surface area and developed mesoporous channels can be prepared, thermal agglomeration of active sites of metal nickel can be avoided, and the stability and catalytic performance of the nickel-based catalyst are improved.

The application provides a lithium ion battery and an electric device, the lithium ion battery comprising a positive electrode sheet and an electrolyte, an active substance in the positive electrode sheet comprising a phosphate lithium positive electrode material and a lithium nickel cobalt manganese oxide, the electrolyte comprising a positive electrode film former, a negative electrode film former and a lithium salt, the lithium salt comprising lithium hexafluorophosphate and a lithium bisfluorosulfonylimide salt, the lithium ion battery satisfying the following formula: wherein NL is a mass ratio of the lithium nickel cobalt manganese oxide and the phosphate lithium positive electrode material, S alt is a value of a molar concentration of the lithium hexafluorophosphate and the lithium bisfluorosulfonylimide salt in the electrolyte in mol / L, and A dd is a mass ratio of the positive electrode film former and the negative electrode film former. The application can adjust the ratio of the positive electrode film former and the negative electrode film former and the ratio of the high-heat-resistance lithium salt according to the mixing ratio of the ternary material doped in the lithium manganese iron phosphate or the lithium iron phosphate, so that the cycle performance of the battery is improved.

A photoexcitable structure, comprising a lithiated nickel oxide (0.1-10% lithium) hole transport layer; a perovskite layer adjacent to the hole transport layer, configured, upon illumination, to generate photoexcited electrons and holes; an electron transport layer, and a buffer layer between the perovskite and ETL, configured to accept electrons from the buffer layer. The buffer layer is formed by atomic layer deposition, with a plurality of atomic layers of at least one resistive oxide having an aggregate thickness of less than 30 nm, configured to impede hole transfer from the perovskite to the electron transport layer, and impede ion migration and water diffusion. Beneath the HTL is a conductive layer or substrate. Above the ETL is an electrode. The entire structure is encapsulated. An alternate embodiment provides a buffer layer over the ETL.