77results about How to "Improve interface contact performance" patented technology

A preparing method for LiFePO4 powder covered by Ni and Cu includes preparing LiFePO4 powder with uniform diameters, preparing a chemical coating liquid C with Cu, putting powder A in SnCl2 water solution, mixing, filtering and washing, after that, the filtered cake is put into PdCl solution, mixing, filtering and washing to put the solid one into the coating solution B and C to be coated, filtered and washed, the power is processed in inert or recovered atmosphere to get the black LiFePO4 powder covered by the metal.

The invention belongs to the technical field of organic photoelectric devices, and particularly relates to an inverted polymer solar cell of an Ag nano particle compounded cavity transmission layer and a fabrication method of the inverted polymer solar cell. The inverted polymer solar cell is characterized in that ITO (indium tin oxide) conducting glass serves as a cathode (1); N type TiO2 serves as a cathode buffer layer (2); a polymer serves as an active layer (3); MoO3/Ag nano particle/MoO3 serves as a anode buffer layer (4); and Ag serves as a anode (5). The active layer (3) is mixed by a donor material namely P3HT (Poly [3-hexylthiophene-2, 5-diyl]) with an accepter material namely PCBM ([6, 6]-phenyl-C61-butyric acid methyl ester) according to a mass ratio of 1:0.8-1; and the thickness of each Ag nano particle is 1-5nm. The utilization ratio of sunlight by the active layer is increased through localized surface plasma action and backscattering enhancing action of the Ag nano particles; in addition, the interfacial contact property between the active layer and an electrode is improved; the anode-toward transmittability of current carriers is improved; the short circuit current density of the inverted polymer solar cell is increased; and the energy transformation efficiency is improved.

The invention provides an electrode plate which comprises a current collector layer, a first conductive layer, an outer conductive layer and a first silicon material layer, wherein the first conductive layer is arranged on the surface of the current collector layer; the first silicon material layer is arranged on the surface of the outer conductive layer; n groups of silicon material layers and conductive layers are sequentially and alternatively arranged between the first conductive layer and the first silicon material layer. The invention further provides a lithium ion battery which comprises the electrode plate provided by the technical scheme of the invention. According to the electrode plate, the conductive layers have a relatively good buffer function on the silicon material layer, after lithium is embedded, the size of the silicon material layer is increased, then conductive layers on two sides can be compressed, in a lithium removed state, the size of the silicon material layer is reduced and the thickness is recovered, and the conductive layers on two sides are elastic and can be recovered to original thickness, so that due to the multi-layer electrode plate structure, a sufficient buffer space can be provided for the silicon material layer, and along with shrinkage of the silicon material layer, relatively good stability and interface contact property of the multi-layer structure can be maintained, and adverse influence caused by silicon material size change in the battery circulation process can be avoided.

The invention discloses a multilayer transparent electroconductive thin film which comprises a substrate, wherein n (n>=2) layers of amorphous oxide layers and electroconductive modified layers are deposited on the substrate alternately and odd layers can be either amorphous oxide layers or electroconductive modified layers. A pulsed laser deposition method or a magnetron sputtering method is used for the preparation of the thin film. The multilayer transparent electroconductive thin film has very low electrical resistivity, but has high visible light transmission and excellent comprehensive photoelectric property, as well as low surface roughness, is easy to prepare in large area evenly and etch by a process, can be applied to fields of display devices, luminescent devices, solar cells and the like, especially to the field of flexible devices.

The invention relates to a super-weather-resistance powder coating for electrostatic spraying and a preparation method thereof. The powder coating comprises the following raw materials of, by weight, 50-80 parts of polyester resin, 15-35 parts of alkyd resin, 3-15 parts of polyester-coated carbon nanotubes, 2-6 parts of nano-titanium dioxide, 1-5 parts of nano-zinc oxide, 1-3 parts of aluminum nitride, 0.5-2 parts of phosphotungstic acid, 0.5-2 parts of quartz, 5-15 parts of bauxite, 2-6 parts of vinyltriethoxysilane, 5-10 parts of titanium dioxide, 1-2 parts of benzoin, 0.5-2 parts of leveling agents, 0.1-1 part of auxiliary agent, 1-5 parts of propylene glycol methyl ether acetate, 4-10 parts of beta-hydroxyalkylamide. According to the provided super-weather-resistance powder coating for electrostatic spraying and the preparation method thereof, on the premise that a good electrostatic spraying effect of the powder coating is ensured, the weather resistance of the coating is greatly improved.

Embodiments of the invention provide a preparation method for a solid-state lithium-ion battery, belonging to the technical field of battery preparation. The preparation method comprises the followingsteps: dispersing a solid electrolyte in a solvent so as to obtain a solid electrolyte solution, wherein a mass ratio of the solid electrolyte to the solvent is 1: (5-50); selecting a three-componentmaterial as a positive electrode of the solid-state lithium-ion battery and using lithium metal as a negative electrode of the solid-state lithium-ion battery; adding a film forming agent into the solid electrolyte solution, coating the surfaces of the positive electrode and the negative electrode with the solid electrolyte solution, carrying out drying, then sintering the positive electrode coated with the solid electrolyte solution at a temperature of 800 to 1000 DEG C, maintaining the positive electrode at the temperature for 2 to 10 h and then carrying out cooling, wherein the film forming agent is polyvinylidene fluoride, polytetrafluoroethylene or polyvinyl alcohol, and a mass ratio of the film forming agent to the solid electrolyte is 1: (10-20); and assembling the cooled positiveelectrode and the negative electrode coated with the solid electrolyte solution so as to obtain the solid-state lithium-ion battery. The preparation method for the solid-state lithium-ion battery is simple in process, and low in energy consumption and cost.

The invention discloses carbon nanotube/zinc oxide/micro-expansion graphite composite heat-conducting silicone grease and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing a carbon nanotube/micro-expansion graphite composite material with zinc oxide by virtue of a high-speed mixing machine, adding the mixture into an ethanol solution, and carryingout ultrasonic stirring until ethanol is completely evaporated, so as to obtain a heat-conducting filling; and adding the heat-conducting filling, silicone oil, a crosslinking agent, a silane surfactant and an antioxidant into an internal mixer, carrying out internal mixing, so as to obtain the composite heat-conducting silicone grease. According to the preparation method, microcrystalline graphite and crystalline flake graphite are mixed to form a micro-expansion graphite material, settling carbon nanotubes to the surface of micro-expansion graphite and into hole structures by virtue of a CVD sedimentation method, the prepared carbon nanotube/micro-expansion graphite composite material is taken as the heat-conducting filling, the heat-conducting filling is modified by virtue of a coupling agent, has good consistency with silicone oil, does not agglomerate and further has good interface contact property. The prepared heat-conducting silicone grease has excellent thermal stability, islow in oil separation value and does not crack and atomize after being used for a long time.

The invention relates to the technical field of lithium ion batteries, in particular to an interface layer and a lithium ion battery comprising the interface layer. Lithium halide generated by the in-situ reaction at the interface of a solid electrolyte and a metal lithium negative electrode can optimize the interface contact property and the interface wettability and provide a rapid ion diffusion path. The metal particles generated by the in-situ reaction at the interface of the solid electrolyte and the metal lithium negative electrode can guide the uniform distribution of an electric field, regulate and control the uniform deposition of the metal lithium in the circulation process, and inhibit the formation and growth of lithium dendrites. The lithium ion battery provided by the invention can effectively stabilize the interface between the electrode and the electrolyte, reduces the chemical reaction activity of the metal lithium negative electrode, avoids the side reaction at the interface, and shows higher cycling stability and coulombic efficiency in continuous charge-discharge cycles.

Fully-degradable plastic film having a fresh keeping function and used for packages is disclosed. The plastic film is characterized in that the plastic film is prepared from 80-85 parts by weight of polylactic acid, 25-30 parts by weight of China hemp fibers, 0.8-1 part by weight of a silane coupling agent kh-550, 20-25 parts by weight of corn starch, 12-14 parts by weight of glycerin, 1.6-2 parts by weight of epichlorohydrin, a proper amount of a sodium hydroxide solution having a concentration of 1 mol/L, a proper amount of hydrochloric acid having a concentration of 1 mol/L, a proper amount of distilled water, 5-6 parts by weight of porous starch, 1-2 parts by weight of magnesium stearate, 3-4 parts by weight of macroporous silica gel and 5-7 parts by weight of tourmaline powder; the plastic film is scientific and reasonable in component ratio, can be prepared into food fresh keeping film or fruit packaging bags, and the like, contains the tourmaline powder and other components, can emit far infrared light and negative ions, and keeps freshness for foods; a process is innovative and convenient in industrial control; and the plastic film is low in cost and wide in source and deserves popularization.

The invention provides a method for preparing nano TiO2 (titanium dioxide) pastes, and is characterized by comprising the following steps in percentage by weight: adding one part of tetraisopropyl titanate to 2-6 parts of ethylene glycol; heating the mixed solution to 90 DEG C; adding 2-4 parts of citric acid; stirring for 6-24 hours magnetically to form TiO2 sols; adding 2-4 parts of P25 powdersand 0.2-0.8 part of pore forming material; and mixing and grinding to prepare the pastes. The method has the advantage of low sintering temperature and is convenient to package a battery.

The invention discloses an organic solar cell structure which is based on a 1,3,4,5,6,7-hexaphenyl-2-3'-(9'-ethylcarbazolyl)-isoindole [HPCzI] material. The structure comprises a substrate, an anode, an anode buffering layer, a hole transport layer, a mixed photoactivity layer, an electronic transport layer, a cathode buffering layer and a cathode in sequence from down to up, wherein the substrate is made of transparent materials such as quartz plates, glass sheets, polystyrene or polyethylene and the like, the anode is made of metal, metallic oxide, carbon black or conducting polymer and the like, whose work functions are all more than that of the cathode, the anode buffering layer and the hole transport layer are made of the HPCzl, the mixed photoactivity layer is made of an organic donor material and an organic receptor material which are mixed, such as CuPc or AnPc which is mixed with C60 or PCBM (fullerene derivatives), the electronic transport layer is made of organic electronic transport materials such as C60 and the like, the cathode buffering layer is made of TPBi, BCP, BPhen, LiF and the like, and the cathode is made of metal or metal alloy, whose work function is relatively lower than that of the anode. Except the anode, all the layers are prepared in a way that organic films are deposited by vacuum vapour plating, spraying, printing and the like. The organic solar cell structure is beneficial for improving power converting efficiency of an organic solar cell.

The invention discloses a fully-degradable plastic film with excellent thermal stability for color printing packaging. The fully-degradable plastic film is characterized by being made from the following raw materials, by weight part, 80-85 of polylactic acid, 20-25 of corn starch, 12-14 of glycerin, 1.6-2 of epichlorohydrin, a proper amount of a sodium hydroxide solution with the concentration being 1 mol/L, a proper amount of hydrochloric acid with the concentration being 1 mol/L, a proper amount of distilled water, 25-30 of hemp fibers, 0.8-1 of a silane coupling agent kh-550, 3-4 of peach gum powder, 2-3 of castor oil, 3-4 of zirconia powder and 3-4 of silicon oxide. Zirconia powder and silicon oxide are modified and added in polylactic acid for inner mixing, so that modified zirconia powder and silicon oxide can be uniformly dispersed and the thermal stability and strength of the plastic film are improved. According to the formula and the technical innovation, the plastic film is good in thermal stability and toughness and is high in strength. Through addition of corn starch, the cost is reduced. The plastic film is safe and non-toxic and can be used for color printing packaging.

The invention provides a negative electrode material for a lithium battery and a preparation method of the negative electrode material. The negative electrode material for the lithium battery has the structure as follows: the inner layer is nanometer porous silicon; the outer layer is nano graphene; and the middle layer is graphite. The lithium battery manufactured by the negative electrode material for the lithium battery has the advantages of good rate capability and stable cycle performance; the method provided by the invention is simple to operate; and industrial production is easy to achieve.

The invention discloses a polymer composite material with an adjustable work function, and a preparation method and application thereof. The polymer composite material comprises at least one conductive polymer, at least one doping agent and at least one solvent which is used for cooperation with the other components of the composite material to form a uniform mixed system. The invention also discloses composite ink and a composite film based on the composite material, and preparation methods thereof. The polymer composite material, the composite ink and the composite film can be used for semiconductor devices with a photoelectric device as a representative. With the polymer composite material provided by the invention, the conductive composite film with a work function adjustable in a range of 4.0 to 5.2 eV can be formed, so the conductive composite film can be used as a modification layer for a positive electrode and a negative electrode, improves interfacial contact performance between electrodes and a photoactive layer and allows a formed device to present lower dependence on film thickness; and thus, requirements on preparation processes for devices can be lowered, and the yield of devices can be increased.

The invention discloses naphthalimides derivatives and a solar cell, and provides the series of naphthalimides derivatives. The naphthalimides derivatives take n-type naphthalimides as basic units; the naphthalimides is connected through ethylene bonds, acetylene bonds or aromatic compounds; the tail ends of naphthalimides contain strong polarity water/alcohol-soluble groups; and the naphthalimides derivatives are water/alcohol-soluble conjugated small molecules. The molecules have excellent dissolution performance in environment-friendly solvents (such as water and alcohol), and meanwhile canfurther improve the electronic transmission performance; in addition, freely moving counter-anions can conduct n-type doping on active layer materials, the interface contact performance is improved,the electronic transmission loss is reduced, and the electronic transmission efficiency is improved; and therefore, the naphthalimides derivatives, serving as cathode interface materials, will have great application potential in the aspect of the novel solar cells.

The invention relates to a lithium secondary battery, a solid electrolyte composite material for the same and a method for preparing the solid electrolyte composite material, and belongs to the fieldof material chemistry. The solid electrolyte composite material is of a double-layer or three-layer structure. The solid electrolyte composite material comprises a layer of Li<7>La<3>Zr<2>O<12> and alayer of CsPbBr<3> when the solid electrolyte composite material is of the double-layer structure. The solid electrolyte composite material comprises an intermediate layer of Li<7>La<3>Zr<2>O<12> whenthe solid electrolyte composite material is of the three-layer structure, and two layers of CsPbBr<3> are arranged on the upper side and the lower side of the intermediate layer. The solid electrolyte composite material is prepared by the aid of spin-coating processes. The lithium secondary battery, the solid electrolyte composite material and the method have the advantages that the solid electrolyte composite material can be used as a solid electrolyte to be applied to the lithium secondary battery, accordingly, interface contact of the solid electrolyte and metal lithium negative electrodescan be improved, interface resistance can be lowered, the capacity of the battery can be enhanced, and the cycle performance of the battery can be improved.

The invention discloses a fully-degradable plastic film with enhanced mechanical property. The plastic film is characterized by being made from the following raw materials, by weight part, 80-85 of polylactic acid, 25-30 of hemp fibers, 0.8-1 of a silane coupling agent kh-550, 20-25 of corn starch, 12-14 of glycerin, 1.6-2 of epichlorohydrin, a proper amount of a sodium hydroxide solution with the concentration being 1 mol/L, a proper amount of hydrochloric acid with the concentration being 1 mol/L, a proper amount of distilled water, 1-1.5 of epoxidized soybean oil, 5-7 of natural latex, 2-3 of butyl lactate and 3-5 of bamboo fibers. The manufactured fully-degradable plastic film is good in toughness and mechanical property, is easy to degrade in a natural condition, and is safe and eco-friendly. The manufacturing method is innovative in process and convenient for industrial control. The fully-degradable plastic film can be widely applied to packages for food and daily necessities. The plastic film is safe and eco-friendly, can be fully degraded, and is high in degradation speed.