149results about How to "Suitable for large-scale commercial production" patented technology

The invention provides a perovskite thin-film solar cell with a three-dimensional ordered mesopore support layer. The perovskite thin-film solar cell with the three-dimensional ordered mesopore support layer comprises a transparent conducting substrate, a compact layer, the three-dimensional ordered mesopore support layer, a perovskite light absorbing layer, a hole transporting layer and a counter electrode layer which are sequentially laminated to form a laminating layer, wherein the three-dimensional ordered mesopore support layer is filled with the perovskite light absorbing layer, the hole transporting layer and the counter electrode layer; the three-dimensional ordered mesopore support layer is of a three-dimensional ordered mesopore material prepared by using water-soluble colloidal crystal microspheres as a template; the aperture dimension of the three-dimensional ordered mesopore support layer depends on the dimension of the water-soluble colloidal crystal microspheres; and the perovskite light absorbing layer is prepared through materials of an ABXmY3-m type crystal structure. The perovskite thin-film solar cell has the advantages that the three-dimensional ordered mesopore support layer of which the aperture is uniform and adjustable, the specific surface area is relatively large and a good electronic transmission channel is arranged is provided and reaches high photoelectric conversion efficiency and outstanding repeatability and stability; and the preparation method has the advantages that the conditions are mild and controllable, the preparation method is simple and needs a little cost, and large-scale commercial production can be popularized.

The invention discloses a high-voltage high-energy-density lithium ion battery which comprises a positive pole piece, a negative pole piece, a diaphragm, electrolyte and a shell, wherein the positive pole piece comprises a positive active material, a conducting agent, an adhesive and a current collector, and the weight percents of the positive active material, the conducting agent and the adhesion are 92 to 97%: 2 to 3.5%: 1 to 6%; the negative pole piece comprises a negative material, a conducting agent, an adhesive and a current collector, and the weight percents of the negative material, the conducting agent and the adhesive are respectively 90 to 96%, 1 to 5% and 4 to 10%; the lithium ion battery is prepared by adopting modified lithium cobalt oxides (LiCoO2) as the positive active material and the artificial graphite or natural graphite as the negative material and matching the corresponding ceramic diaphragm, high-voltage electrolyte, adhesive and conducting agent. The lithium ion battery not only has high energy density and high discharging platform, but also is good in chemical performance and safety performance and is applicable to the commercialized mass production.

A metal ligand is changed, and through precisely controlled carbonization and metal high temperature reduction, a metal mono-atomic nitrogen-sulfur dually-doped carbon material is obtained. An S-containing ligand is added to prevent the generation of metal carbides during the pyrolysis process; the temperature and time of pyrolysis are controlled to avoid the precipitation of a carbon layer; metalions are anchored in a carbon skeleton of graphene; exposed metal nitrides and metal sulfides on the surface can be easily removed by acids; mono-atom level dispersion of metals in a graphene structure is realized, and at the same time, more active sites are exposed. The adjusting function of S during the pyrolysis process is smartly utilized to synthesize a metal mono-atomic catalyst, all metalatoms (100%) are utilized, and the dispersion, stability, and characteristic activity of the catalyst are all improved. Furthermore, the synergistic effect is generated by co-doping of nitrogen and sulfur and the catalytic activity is further enhanced. The prepared mono-atomic catalyst has excellent hydrogen evolution / oxygen reduction catalytic activity, the operation is simple, the industrial production is easy, and the catalyst can be widely applied to fuel cells that take a proton exchange membrane as the electrolyte.

The invention discloses a preparation method of a nano-structure. The preparation method comprises the following steps: providing a substrate; forming a polymer layer on the substrate; bombarding the polymer layer with plasma to form a columnar nano-structure; performing anisotropic etching on the substrate by taking the columnar nano-structure as a mask to form a conical nano-structure; and removing the columnar nano-structure. The method is simple in process, high in controllability, and suitable for large-scale commercialized production. Nano-structures can be machined in batches and in parallel.

The invention relates to a method for preparing an integrated quasi-solid zinc ion battery and relates to the technical field of batteries. The method is characterized by using a hydrogel as a substrate, and embedding the positive electrode material and the negative electrode material of the zinc ion battery in the hydrogel substrate to realize the integrated structure of the battery, thereby avoiding the problems such as interfaces, compatibility and short circuits caused by the layered assembly of the positive electrode, the diaphragm and the negative electrode of a traditional battery. Themethod uses the hydrogel as the gel electrolyte of the zinc ion battery, embeds the flexible zinc negative electrode prepared by electro-deposition, and then chemically polymerizes a polymer materialin situ on the surface of the gel electrolyte as a positive electrode. The integrated quasi-solid zinc ion battery with a customized shape can effectively reduce the interface impedance inside the battery and promotes the rapid transmission of electrolyte ions inside the electrode. The most important thing is that such design can provide more positive electrode material loading area for the battery, which greatly increases the energy density of the battery. The invention is used in the field of batteries.

Disclosed is a preparation method of formaldehyde-photodegrading honeycomb activated carbon. The method is characterized by including: putting powdered activated carbon in a home-made cellophane mould, adding a black material prior to mixing for a certain period of time, rapidly adding a white material, performing high-speed mixing prior to free foaming, carrying out room-temperature curing prior to forming, putting the formed material in a muffle furnace for high-temperature heat treatment prior to obtaining the honeycomb activated carbon, subjecting TiO2 nano particles of P-25 type to ultrasonic dispersion to form suspension liquid, completely immersing the prepared honeycomb activated carbon into the suspension liquid, and performing heat treatment to prepare a P-25 / activated carbon composite having good photocatalytic degradation performance on indoor formaldehyde. The operation process has the main advantages that that the operation method is simple, the prepared honeycomb activated carbon is large in specific surface area and high in adsorptive property, can be prepared into arbitrary shape, has good catalytic degradation performance on indoor formaldehyde gas and is reusable, low in production cost and applicable to removal of formaldehyde gas after home decoration, and after the honeycomb activated carbon is loaded with P-25, the P-25 nano particles are evenly dispersed in the surface and pores of the honeycomb activated carbon.

The invention relates to a method for synthesizing manganese phosphate lithium sol-gel doped with other metal ions. The method comprises the following steps: (1) dissolving a lithium source compound, a manganese source compound, a metal ion compound, a carbon source compound, a phosphorus source compound and a complexing agent in deionized water, wherein the molar ratio of the complexing agent to the lithium source compound is 0.5-2.5; (2) stirring a settled solution strongly and evaporating the solution until a viscous substance is obtained, and performing drying and ball milling on the viscous substance in a blasting drying box to obtain a mixed powder; and (3) transferring the mixed powder into a ceramic boat, and performing calcinations under the atmosphere of indifferent gas under the temperature of 500-800 DEG C for 1-24 hours to obtain a manganese phosphate lithium product doped with other metal ions. The method provided by the invention has the advantgages of improving the electric conductivity of materials effectively and largely improving the cycle performance of materials, has also the advantages of good evenness of the synthesized manganese phosphate lithium sol-gel doped with the other metal ions, low production cost, simple operation and easiness to realize commercialized production.

The invention provides an ultralow-temperature lithium ion battery composite positive electrode material and a preparation method thereof, and belongs to the technical field of an ultralow-temperature lithium ion battery. The molecular formula of the composite positive electrode material is P@LiNi<x>Co<y>Mn<z>O2, wherein P is one or more of polypyrrole, polyaniline, diazonium salt and polyethylene dioxide / polyethylene glycol, x is more than or equal to 0.5 but less than or equal to 1, y is more than or equal to 0 but less than or equal to 0.3, z is more than or equal to 0 but less than or equal to 0.3, and (x+y+z) is equal to 1. The invention also provides a preparation of the ultralow-temperature lithium ion battery composite positive electrode material. The discharge capacity of a battery assembled from the positive electrode material at 20 DEG C is 80% or above of the discharge capacity of the battery at a normal temperature of 25 DEG C, and the battery has excellent cycle property.

The invention provides an antigen composition used for immunodetection of a tuberculosis infected cell. The antigen composition comprises mycobacterium tuberculosis CFP-10, ESAT-6 and Rv3873 antigens and / or antigen epitope peptides derived from the antigens. In an optimized embodiment, the antigen composition comprises all the antigen epitope peptides contained in the mycobacterium tuberculosis CFP-10, ESAT-6 and Rv3873 antigens. The invention also provides an application of the antigen composition to preparation of detection reagents used for detecting specific T cell immune response caused by tuberculosis infection in vitro. After lymphocytes of human or animals are stimulated by the antigen composition, cell factors secreted by a tuberculosis specific T cell are detected.

The invention discloses a preparation method for a traditional Chinese medicine enzyme. The preparation method comprises the steps that (a) digestion is performed on a traditional Chinese medicinal material, so that an extracting solution is obtained; (b) the temperature of the traditional Chinese medicinal material extracting solution is controlled below 50 DEG C; (c) the traditional Chinese medicinal material extracting solution, an enzyme raw material and glace sauce are placed into an enzyme preparation container for fermentation, wherein the enzyme raw material comprises at least one type of living plant tissue; (d) liquid in the enzyme preparation container is separated. The invention further discloses a reasonable osmotic pressure range during fermentation of the traditional Chinese medicine enzyme. Traditional Chinese medicine enzyme prepared according to the preparation method is more reliable and effective in disease prevention and treatment. Compared with a common traditional Chinese medicine decoction, the traditional Chinese medicine enzyme is palatable, easier to store and convenient to take quickly for a long time. The preparation method is high in operability, suitable for large-scale commercial production and also suitable for home making.

The invention provides a method for preparing a high-concentration gradient AZO monocrystalline conductive thin film by a direct current / radio frequency co-sputtering process. Target materials used by sputtering comprise a ZnO target and an Al target, the ZnO target is mounted on a radio frequency target of magnetron sputtering equipment, the Al target is mounted on a direct current target of the magnetron sputtering equipment, and meanwhile, a monocrystalline silicon substrate is mounted on a sample table at the top of a vacuum chamber of the magnetron sputtering equipment. The gradient AZO thin film is prepared by the co-sputtering process. The initial doping amount of Al is 40-60%. The power of the Al target material continuously varies in the whole film coating process, the variation rule is that the power of the Al target material decreases with the continuous increase of the thickness of the sputtered and deposited thin film, and the gradient AZO thin film is prepared when the doping amount of the Al is reduced to 3%. The method has the advantages that the thin film prepared by the method is even in gradient and great in monocrystalline orientation and has excellent photoelectric performance; and meanwhile, the method is low in cost and suitable for technically massive production.

The invention discloses a biomass porous carbon material and a preparation method and application thereof, and belongs to the technical field of preparation of porous carbon materials. The method comprises the following steps: drying watermelon peel without outer hard peel, and then pulverizing the dried watermelon peel; mixing the obtained watermelon peel powder and an activating agent in a solution to obtain a precursor; and finally, carrying out high-temperature anaerobic carbonization process to obtain the biomass porous carbon material. The prepared biomass porous carbon material can be used for electrode materials of supercapacitors. The preparation method is simple and feasible; the obtained biomass porous carbon material is fluffy in structure, low in cost and excellent in performance, and is suitable for large-scale commercial production; and the method provides a new way for preparation of biomass porous carbon materials.

The invention discloses a dual-layer composite structured ternary positive electrode material and a preparation method therefor, and belongs to the technical field of a positive electrode material of a lithium ion battery. The molecular formula of the positive electrode material is LiNi<x>Co<1-x-y>Mn<y>O<2>, wherein x is greater than 0 and less than 1, y is greater than 0 and less than 1, and x+y is less than 1; the positive electrode material adopts a dual-layer structure; an inner layer adopts a loosened porous structure formed by nano-scale granules through aggregation; and an outer layer adopts a structure which is formed by micron-scale granules in radiative directional arrangement and accumulation and surrounds the inner layer. By controlling a material precursor synthesis process, a precursor material with a dual-layer composite material is prepared; and through sintering, the dual-layer composite structured positive electrode material is prepared. The positive electrode material prepared by the method is high in cycling stability and high in safety; the cycle retention rate is greater than 95% when a half battery is subjected to 100 cycles at 1C; and the cycle life of a full battery is more than 2,000 times at 1C.

The invention aims to provide a preparation method for a non-Pt non-H anode catalyst of a proton exchange membrane fuel cell (PEMFC) to solve the problems of the conventional Ir-based catalyst preparation method. The method comprises the following steps: Ni ammonia complex cations are formed by taking strong ammonia solution as a complexant; Ni-Ir precursor is uniformly deposited on the surface of conductive carbon carrier due to the static attraction function between the Ni ammine complex cations and Ir complex anions under a water bath drying evaporation condition; finally, Ir and Ni are slowly released, reduced and alloyed from the complex compounds through hydrogen atmosphere heat treatment so as to form carbon carried Ir-Ni alloy catalyst of which the ingredients are uniform and the nano particles are distributed uniformly. According to the invention, the conventional Ir-based catalyst preparation method is greatly simplified; the surface of prepared catalyst is clean; the particle size of the catalyst is small; the catalyst is high in dispersion; the metal utilization ratio as well as the hadrogen and oxidization activity is effectively improved.

The invention relates to a preparation method for carbon compounded lithium ferromanganese phosphate used for a lithium ion battery. The preparation method comprises the steps of (1) dissolving a manganese source compound and a phosphorus source compound in water to form a water solution; dripping absolute ethyl alcohol in the water solution; stirring, filtering, washing and drying when a precipitate appears in the water solution to obtain a precursor; and (2) ball-milling the precursor, a lithium source compound and a ferrous salt compound, drying to form a mixture, calcining the mixture and cooling the calcined mixture to obtain the carbon compounded lithium ferromanganese phosphate material. In the method, a soluble manganese-containing compound is employed as a manganese source; a soluble phosphorus-containing compound is employed as a phosphorus source; the raw materials are mixed uniformly to obtain the uniform precursor on a molecular level; and the precursor, the lithium source and the ferrous source liquid are mixed; so that the uniformity is improved. Besides, by only using absolute ethyl alcohol as an ageing agent, the method is simple in operations and processes, and is suitable for large-scale commercialized production. The absolute ethyl alcohol ageing agent is non-toxic and harmless, can be recycled through rectification in the large-scale production, can be reused circularly, and is low carbon and environment-friendly.

The invention provides a negative electrode piece which comprises a negative electrode current collector and a negative electrode slurry applied on the negative electrode current collector. The negative electrode slurry includes a negative electrode active material, a negative electrode binder and a negative electrode conductive agent, the negative electrode active material is a mixture of Liy-SiOx and graphite, and the Li-SiOx accounts for 1% to 55% of the negative electrode active material. The invention belongs to the technical field of lithium-ion batteries, the negative electrode active material is a mixed material of Liy-SiOx and graphite, the problems of low first effect, fast cycle decay and large cycle expansion of a high-proportion mixed negative electrode can be effectively solved, therefore, the energy density and cycle life of the battery are significantly improved, and the negative electrode piece is suitable for large-scale commercial production.

The invention provides a preparing method of an alloy high temperature oxidation resisting nanostructure conductive coating, i.e. a spinel powder reduction coating method. On one hand, coating powdermaterial with favorable sintering performance is obtained by the regulation and control of the preparing process of coating powder material and effective reductive treatment; on the other hand, a nanometer microstructure film is prepared on the alloy surface by adopting silk screen assisted improved sizing agent coating technology. The film has controllable and even thickness and superior performance, and coating is tightly combined with the alloy; the coating alloy has lower area specific resistance (ASR) and higher long-time running stability under high temperature oxidation environment. Thespinel powder reduction coating method originated by the invention has simple film manufacturing method, low cost and strong repetitiveness, can be applied to coating preparation of alloy with different shapes or sizes, has superiority especially when preparing the large-area alloy coating in practical application, can greatly lower the preparing cost of the alloy coating and has strong applicability.

The invention provides a method for superior edible high-content lutein crystal from vegetable oil resin without other organic solvent except edible alcohols. Wherein, neutralizing the saponified mixed solution to remove the water-soluble and oil-soluble impurity by hot water and alcohol respectively. The final product content and yield can achieve 90% and 80% respectively. This method is fit to industrial production.

The invention provides a light emitting diode (LED) chip and a fabrication method thereof. The LED chip comprises a substrate, steps, slopes and a membrane layer, wherein the steps are formed on the substrate, the slopes encircle the steps, and the membrane layer covers the steps, the slopes and the substrate. In the LED chip, the slopes encircle the steps, the problem that the subsequently-formed membrane layer is broken can be effectively solved, thus, the electric leakage problem caused by membrane layer breakage can be solved, and the performance of the inverted LED chip is favorably promoted. Moreover, the slopes are formed by simple processes of spin coating, roasting (or illuminating), etching and the like, and the method is cheap in cost and suitably used for commercial production at a large scale.

The invention discloses an embedded nanometer forest structure and a preadaptation method thereof. The method comprises: providing a substrate; forming an etching stopping layer with an opening on the substrate; forming a nanometer masking structure on the surface of the substrate; performing anisotropic etching, and forming the embedded nanometer forest structure at the opening of the substrate; and removing the nanometer masking structure and the etching stopping layer. The top of the embedded nanometer forest structure can be in seamless joint with the smooth surface of another substrate, and the nanometer masking structure can totally covers the opening area, a gap can not be formed in the edge part of the embedded nanometer forest structure after the anisotropic etching, and DNA molecules can be prevented from flowing through the gap between the nanometer forest structure and a microchannel.

The invention discloses a method for preparing a high-conductivity carbon material by virtue of a hydrothermal method. The method is characterized by comprising the following steps: by taking carboxymethyl cellulose as a raw material and taking pure water as a solvent, performing one-step high-temperature high-pressure hydrothermal treatment on a doping nitrogen source, and performing centrifugal separation, thereby obtaining a deep brown solid product; washing the brown solid product until the filtrate is clarified by using distilled water and absolute ethyl alcohol, performing vacuum drying, and performing high-temperature activation and pyrolysis on the obtained product, thereby obtaining a graphite-like structure carbon material with high nitrogen doping content and developed porous structure, wherein the carbon material has high conductivity and has potential application values in the field of preparation of lithium ion batteries and super-capacitors. The operation process has the main characteristics that the carboxymethyl cellulose is taken as the raw material and is environment-friendly, low in price and readily available, the nitrogen source is doped into carbon in the form of functional groups such as amino, pyridone and pyridine after the hydrothermal reaction and is subjected to high-temperature activation treatment so as to exist in a stable graphite nitrogen form, the graphite-like structure carbon material with high specific surface area and developed porous structure is generated, and high conductivity is promoted. The nitrogen source and the activation conditions are changed, so that carbon materials of different nitrogen doping amounts and pore structures can be controlled to be prepared, the conductivity is further adjusted, the highest conductivity of the prepared material can reach 120-166Sm<-1>, the method is simple and performance is excellent.

The invention provides a preparation method for a forest nanostructure and a regulation and control method for the forest nanostructure. The preparation method for the forest nanostructure comprises the following steps: S1. employing a mixture comprising a couplant and a polymer to form a film layer on a substrate; and carrying out plasma bombardment on the film layer, thereby forming the forest nanostructure. Through carrying out bombardment on a polymer layer by adopting plasma, part of products produced by the polymer can be repolymerized to form a forest nanostructure; and the couplant isadded on the basis of the polymer, during plasma bombardment, groups of the polymer and the couplant in the film layer are activated, organic groups and inorganic groups of the couplant are interconnected with organic groups and inorganic groups of the polymer separately, and meanwhile, the organic groups of the couplant are in a crosslinked action, so that active groups produced from plasma bombardment are repolymerized, an original mixture layer disappears, and similarly, the forest nanostructure is formed.

The invention discloses a Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst and a preparation method thereof and application of a Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst. According to the method, ZIF-67 growing on MWCNTs in situ serves as a precursor, and a Co-N doped porous carbon coated carbon nanotube core-shell structure catalyst (CNTs@Co-N-PC) can be prepared through simple pyrolysis and acid treatment steps. The method is simple and controllable in process condition and suitable for large-scale commercial production, and the prepared catalyst is excellent in performance and low in cost and has a good application prospect.

The invention discloses a preparation method of a nickel hydroxide / graphene composite material for a nickel-metal hydride battery positive pole, and belongs to the technical field of nickel-metal hydride battery pole materials. The method comprises the steps that graphite oxide is used as a raw material to be pressed into 1 mg / mL suspension liquid, nickel nitrate of different masses is added into the suspension liquid, the mass ratio of graphite oxide to nickel hydroxide in the composite material is 1:5 or 1:9 or 1:13, the suspension liquid with the nickel nitrate added is subjected to ultrasonic wave dispersion, then urea is dropwise added into the suspension liquid, the mixture is transferred into a three-mouth flask after being stirred, then the three-mouth flask is placed into an Apex normal-pressure micro wave reaction synthesizer for a reaction, then vacuum filtration is carried out, the product is washed with deionized water and absolute ethyl alcohol to be neutral, vacuum drying is carried out, and therefore the nickel hydroxide / graphene composite material is prepared. The preparation method has the advantages that the temperature gradient is small, the reaction speed is high, heating is uniform, crystallization time is short and the yield is high, and the preparation method is applicable to large-scale commercialized production.

The invention discloses a method for preparing organic chlorofluoro compounds from organic polychlorinated compounds, which is realized by the following steps: adding organic polychlorinated compoundsand an alkali metal fluridizer to a mixed polar and nonpolar solvent, and carrying out the substitution reaction at 100-200 DEG C to prepare the organic chlorofluoro compounds. The method can controlthe fluorating depth with high selectivity so as to purposefully control the quantity of chlorine atoms substituted by fluorine in the organic polychlorinated compounds, so that not all chlorine atoms can be substituted. The method has the advantages of simple preparation process, high selectivity and high yield, and is suitable for large-scale commercial production.

The invention provides a low-temperature lithium ion battery anode material and a method for preparing the same, and belongs to the field of lithium ion battery anode materials. By the aid of the low-temperature lithium ion battery anode material and the method, the technical problems of poor low-temperature performance of existing lithium ion batteries and incapability of meeting market demands on electric vehicles can be solved. A structural formula of the low-temperature lithium ion battery anode material is LiNi<x>Co<y>Mn<z>M<e>O<2>, wherein the x is larger than or equal to 0.5 and is smaller than or equal to 1, the y is larger than or equal to 0 and is smaller than or equal to 0.3, the z is larger than or equal to 0 and is smaller than or equal to 0.3, the e is larger than or equal to 0 and is smaller than 1, the sum of the x, the y, the z and the e is equal to 1, the M represents doped trace elements, and the doped trace elements are selectively a type of Al, Mg, Zn, Ce and La. The low-temperature lithium ion battery anode material and the method have the advantages that the low-temperature lithium ion battery anode material is high in specific capacity and first charge-discharge Coulomb efficiency and excellent in low-temperature performance, and the discharge capacity of the low-temperature lithium ion battery anode material at the low-temperatures at least can reach 85% of the discharge performance of the low-temperature lithium ion battery anode material at the normal temperatures under various multiplying power conditions.

The invention provides a preparation method and application of a konjac flour-based porous carbon material, and belongs to the technical field of preparation of porous carbon materials. The preparation method of the konjac flour-based porous carbon material of the present invention is as follows: firstly, the raw material of konjac flour is pyrolyzed under normal pressure to obtain a pre-carbonized product; then the pre-carbonized product is mixed with an activator, deionized water is added and stirred, and then dried to a constant weight to obtain an activated precursor mixture; then, the activated precursor mixture is carbonized at a high temperature aerobic and then lowered to room temperature, washed with hydrochloric acid, and dried to a constant weight to obtain a konjac flour-based porous carbon material. The prepared konjac flour-based porous carbon materials can be used as supercapacitor electrode materials. The preparation method of the invention is simple and feasible, low in cost and excellent in performance, and is suitable for large-scale commercial production. This method provides a new way for the preparation of porous carbon materials.

The invention discloses a preparation method for photocuring material micro-nano fiber via large-scale solvent-free electrospinning. The preparation method comprises the following steps of (1) preparing spinning pre-cursor solution for photocuring material, (2) electrospinning micro-nano fibers, in which the spinning pre-cursor solution prepared in the (1) step is disposed in a solution storage mechanism with a static electrospinning device communicated a spinning nozzle; the spinning nozzle of the static electrospinning device and a collection pole are placed in environment with inadequate oxygen for electrospinning; jet flows sprayed out by the spinning nozzle is irradiated by ultraviolet source during the electrospinning; and photocuring material micro-nano fiber can be collected on the collection pole of the static electrospinning device. The preparation method is simple and avoids pollution of organic solvent to the environment, so safety and environment protection can be achieved; the method is suitable for large-scale production for photocuring material micro-nano fibers; technical difficulties of complicate preparation procedures of pre-cursor solvent during electrospinning, short fibers, incomplete and irregular photocuring and incapability of large scale production.

The invention provides a negative pole piece and a lithium ion battery containing the same. A negative electrode active material of the negative pole piece uses a mixed material of a magnesium-silicon-oxygen composite oxide and graphite, wherein the magnesium-silicon-oxygen composite oxide material has the advantages of higher initial charging efficiency, higher compaction density (up to 1.8 g / cm<3>) and smaller expansion cycle and the like than a SiOy material (y is a number between 0.8 and 1.2), so that volume change in the lithium intercalation process of the negative electrode can be reduced to a certain extent, particle integrity and integrity of the pole piece are ensured, cycle performance of the negative pole piece is improved, and the problems of low first charging efficiency, fast cycle attenuation, large cycle expansion and the like of the SiOy material high-proportion doped negative electrode can be effectively solved; and therefore, the energy density and the cycle life ofthe battery are remarkably improved, and the negative pole piece is suitable for large-scale commercial production. The energy density of the lithium ion battery recorded by the invention is obviously improved, the problem of rapid attenuation at the initial stage of circulation is effectively improved, and the service life is longer.

The invention discloses a high-performance perovskite solar cell. The solar cell structure sequentially comprises a conductive substrate, an electron transport layer, a perovskite light absorption layer, a hole transport layer and an anode layer from bottom to top, wherein the perovskite light absorption layer contains an additive; the additive is one of 2,6-ditert-butyl-4-methylphenol, acesulfamepotassium or sodium cyclamate; the additive is added to a perovskite precursor solution; the dosage of the additive accounts for 5-30% of total mass of the perovskite precursor solution; and the thickness of a thin film of the perovskite light absorption layer is 300-500nm. According to the high-performance perovskite solar cell, the film-forming quality of perovskite is improved through adding the additive, and holes are reduced, thereby reducing recombination of photoelectrons, improving the photoelectric property of the perovskite and obtaining the perovskite solar cell with high current density and high efficiency; and the high-performance perovskite solar cell has the advantages of being mild and controllable in condition, simple in preparation, low in cost and suitable for large-scale commercial production.