57results about How to "Improve interface resistance" patented technology

The present invention concerns electrode materials capable of redox reactions by electrons and alkaline ions exchange with an electrolyte. The applications are in the field of primary (batteries) or secondary electrochemical generators, super capacitors and light modulating system of the super capacitor type.

The invention discloses an apparatus and a method for stabilizing clay by microbiological-electroosmosis processes. The apparatus comprises culture dishes, nutrient solution dishes, a direct-current power supply, microbiological-electroosmotic devices, thermometers and cooling devices. The method includes the steps of firstly, burying cathodes and anodes of the microbiological-electroosmotic devices on two sides of clay to be treated, inserting the thermometers to the center line of the clay to be treated, and arranging the culture dishes and the nutrient solution dishes near the microbiological-electroosmotic devices; secondly, putting Bacillus pasteurii into the culture dishes, putting urea containing dissolved calcium salt into the nutrient solution dishes, culturing strains, and injecting the urea nutrient solution mixed with the strains and the dissolved calcium salt into the microbiological-electroosmotic devices and the clay; thirdly, turning on the direct-current power supply to perform electroosmosis while controlling the temperature to be lower than 50 DEG C. Compared with the prior art, the apparatus and the method have the advantages of good stabilization effect, high cost performance and convenience in operation without weather effect.

A resistance voltage divider circuit of a gradation potential generation circuit for adjustment, which generates a gradation potential for driving a liquid crystal device. The circuit includes three resistors (11) which are equal in resistance value and have contacts (12) at equal positions. The contacts (12) at the equal positions of each resistors (11) are connected to one another so as to connect the resistors in parallel, reference potentials V1 and V2 are inputted across the resistors connected in parallel, and a gradation potential is generated on a junction point of the contact (12) according to a voltage divided by the resistors (11).

Provided are a solid battery which can reduce overvoltage and a regeneration method thereof. The solid battery comprises: an anode capable of absorbing and releasing an alkali metal ion or alkaline earth metal ion; a solid electrolyte layer containing a solid electrolyte having ion conductivity and disposed in a manner to contact the anode; a cathode capable of releasing and absorbing the alkali metal ion or alkaline earth metal ion which moves between the anode and cathode; a heating device to heat the anode to a temperature at which it softens; and a fastening device capable of applying force to closely contact the solid electrolyte layer with the anode. The regeneration method comprises the steps of heating the anode to a temperature at which it softens, and compressing the softened anode, in a direction intersecting a face of the anode which contacts with the solid electrolyte layer.

The invention discloses a functionalized graphene hydrogel/functionalized carbon cloth composite fabric, a flexible all-solid-state supercapacitor integrated electrode and a preparation method. Functionalized graphene hydrogel is fixed in a functionalized carbon cloth frame through a one-step hydrothermal method, and then lignin/polyaniline composite hydrogel and the functionalized graphene hydrogel/functionalized carbon cloth composite fabric are prepared into the flexible all-solid-state supercapacitor integrated electrode by adopting an in-situ polymerization method. According to the method, the functionalized graphene hydrogel is used for filling gaps and macroscopic macropores in carbon cloth, and serves as a 3D conductive scaffold, so that the load of active substances in the electrode can be obviously increased, the interface resistance of the electrode is reduced, and the conductivity of the electrode is improved; and the prepared integrated electrode is assembled into a symmetric supercapacitor which shows excellent area capacitance, super-high energy density, high mechanical flexibility and cycling stability.

The invention belongs to the field of lithium ion battery material and particularly relates to a lithium ion battery, a cathode thereof and a binder for the cathode. The binder is formed by polymerizing the monomer emulsion of butadiene, Rn-CH=C-CN and CH3-C=CH-COORm; and the product is purified to obtain emulsion containing 35-55% of glue. The invention also provides a method for manufacturing a cathode plate by using the binder and battery performance thereof. The slurry of cathode active substance comprises active substance, conductive carbon, binder, sodium carboxymethylcellulose and deionized water based on the proportion of (85-98):(0-3):(1-10):(1-2):(100-150). The method comprises the following steps: coating the slurry on copper foil; drying; compacting with a rolling machine; chopping to obtain an electrode plate; and winding the electrode plate with an anode plate to obtain the battery. The manufactured battery has good low-temperature performance, ensures that lithium is not separated out under the condition of 0.7C charge and 0.5C discharge at the temperature of 10 DEG C, and has the characteristics of safety, reliability and long cycle life.

The invention discloses a vacuum electroosmosis curing water supply plant sludge device and a use method thereof. The positive electrode and the negative electrode of a direct-current power supply of the device are respectively connected with negative electrode metal and positive electrode metal inside a sludge tank; the other ends of the negative electrode metal and the positive electrode metal are respectively connected with vacuum tanks through drain tubes; vacuum pumps and valve are arranged on the drain tubes; the vacuum pumps are both connected with a timing switch. According to the method, curing is performed firstly and electroosmosis is performed secondly, and the timing switch is adopted to control the vacuum pumps to be opened or closed. The vacuum electroosmosis curing water supply plant sludge device is good in water supply sludge curing effect, the sludge obtained after metal ions are removed meets the national soil reuse discharge standard, and the operation cost is low when being compared with that of a conventional vacuum combined electroosmosis device.

The invention discloses a method for preparing a large-area perovskite solar cell based on spraying technology. The method comprises the following steps: firstly putting a transparent conductive base on a platform and spraying an electronic transmission layer; and preparing a perovskite optical absorption layer by a continuous spraying method: firstly spraying a PbI2 solution on the electronic transmission layer, and heating for 30min at 70-90 DEG C; further spraying a CH3NH3I solution and heating for 120min at 90-110 DEG C; cooling to room temperature, washing with isopropyl alcohol and drying; spraying a hole conduction layer; and finally, spraying a silver nanowire/graphene to prepare a counter electrode. In the invention, the parameters of the spraying technology are adjusted to realize preparation of the large-area perovskite solar cell; and the preparation method is simple and easy to implement, can realize low-cost preparation of an efficient perovskite solar cell and has a good industrialization prospect.

Provided are a secondary battery and a secondary battery pack having the same capable of preventing performance degradation by preventing an increase in an interface resistance of an electrode body accommodated in a pouch and capable of improving stability by preventing deformation of the electrode body to thereby prevent a fine short circuit even though the pouch is swelled due to a gas generate at a high temperature, by providing first members for reinforcing rigidity and second members deformed at the high temperature and capable of adhering the electrode body to one side or both sides of the electrode body accommodated and sealed in the pouch.

The invention relates to a solid-state battery electrode unit. The solid-state battery electrode unit comprises a positive electrode layer, a negative electrode layer and an electrolyte layer, whereinthe electrolyte layer includes positive electrode solid electrolyte having concentration gradient distribution and a negative electrode solid electrolyte having concentration gradient distribution. The solid-state battery contains the continuous transition gradient electrolyte, so the interface resistance condition of the solid-state battery is greatly improved, electrical property of the solid-state battery is improved, and safety of the battery is not reduced, moreover, the solid electrolyte layer can be prepared by a conventional method, and the process is simple and convenient.

The invention relates to a non-enzymatic biosensor based on a carbon material/boron-doped diamond composite electrode as well as a preparation method and application of the non-enzymatic biosensor. Aworking electrode of the non-enzyme biosensor is a carbon material/boron-doped diamond composite electrode; the carbon material/boron-doped diamond composite electrode comprises a substrate, a boron-doped diamond layer arranged on the surface of the substrate and a carbon material arranged on the surface of the boron-doped diamond layer, the carbon material is selected from at least one of microcrystalline graphite, carbon nanotubes, carbon nanofibers and graphene, the carbon nanotubes are carbon nanotubes growing at the bottom end, the boron-doped diamond film is of a surface porous structure, and meanwhile the surface of the boron-doped diamond film is further modified with nickel nanoparticles. By combining chemical vapor deposition, magnetron sputtering and annealing, nickel catalyticpreparation of different composite material electrodes is realized. The prepared composite carbon material electrode has the characteristics of high sensitivity, high stability, high resolution and high selectivity, and can be widely applied to the construction of glucose sensors.

A positive electrode for a lithium secondary battery includes a positive electrode current collector; a lower positive electrode active material layer disposed on at least one surface of the positive electrode current collector; and an upper positive electrode active material layer disposed on the lower positive electrode active material layer, wherein the lower positive electrode active material layer includes 90% or more of a sphere-type carbonaceous conductive material as a conductive material, the upper positive electrode active material layer includes 90% or more of a needle-type carbonaceous conductive material as a conductive material, and the content of the conductive material contained in the lower positive electrode active material layer is larger than the content of the conductive material contained in the upper positive electrode active material layer.

The invention discloses a preparation method of an antistatic coating, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: mixing and fermenting sisal fibers, a bacillus pasteurii bacterial solution, urea and water, dropwise adding an iron nitrate solution, stirring and mixing, filtering, freezing, ball-milling, sieving, drying and carbonizing the mixture, performing gradual heating, and carrying out high-temperature treatment to obtain the modified fibers. According to weight ratio, 40-60 parts of modified epoxy resin, 40-60 parts of a diluent, 10-20 parts of pretreated mica powder, 10-20 parts of modified fiber, 10-20 parts of modified additive, 5-8 parts of a curing agent, 5-8 parts of modified sepiolite, 20-30 parts of alkaline phenolic resin and 10-20 parts of modified diatomite are stirred and mixed to obtain the antistatic coating. The anti-static coating provided by the invention has excellent anti-static performance.

The invention discloses a high-voltage-resistant composite solid electrolyte, a preparation method of the high-voltage-resistant composite solid electrolyte and an all-solid-state lithium battery, and relates to the technical field of lithium ion batteries, and the high-voltage-resistant composite solid electrolyte is formed by hot pressing of a first composite solid electrolyte layer and a second composite solid electrolyte layer; the first composite solid electrolyte layer comprises a COFs matrix and a polymer electrolyte A loaded on the surface of the COFs matrix, and the polymer electrolyte A comprises polyoxyethylene, bismuth trioxide, a lithium salt and polyvinylidene fluoride; the second composite solid electrolytic layer comprises a COFs matrix and a polymer electrolyte B loaded on the surface of the COFs matrix; and the polymer electrolyte B comprises polymethyl methacrylate, bismuth trioxide, lithium salt and polyvinylidene fluoride. According to the composite solid electrolyte, the electrochemical window of the solid electrolyte is widened, the interface resistance is reduced, the interface stability of the positive electrode and the negative electrode and the lithium ion transmission performance are improved, the composite solid electrolyte can be simultaneously suitable for a lithium metal negative electrode and a high-voltage ternary positive electrode, and the cycle performance of a battery is improved.

The invention provides a copolymerization solid electrolyte, a preparation method thereof and a solid polymer lithium battery. The preparation method of the copolymerization solid electrolyte comprises the following steps: (1) uniformly mixing a polymer monomer and a copolymer, adding a lithium salt, and completely dissolving to obtain an electrolyte precursor, the copolymer being a fluorinated amide compound; and (2) adding an initiator into the electrolyte precursor, and carrying out copolymerization reaction on the polymer monomer and the copolymer under a heating condition to obtain the solid electrolyte. The solid electrolyte disclosed by the invention is simple in preparation process and high in applicability, can be matched with a relatively high-voltage positive electrode material in a room-temperature/low-temperature environment, and is obviously improved in ionic conductivity; and the in-situ polymerization technology improves the interface contact problem of the electrode/electrolyte, the interface resistance is also greatly improved, and excellent interface performance and cycle performance can be realized.

The present disclosure relates to a solid-state electrochemical cell having a uniformly distributed solid-state electrolyte and methods of fabrication relating thereto. The method may include forming a plurality of apertures within the one or more solid-state electrodes; impregnating the one or more solid-state electrodes with a solid-state electrolyte precursor solution so as to fill the plurality of apertures and any other void or pores within the one or more electrodes with the solid-state electrolyte precursor solution; and heating the one or more electrodes so as to solidify the solid-state electrolyte precursor solution and to form the distributed solid-state electrolyte.