68results about How to "Lower internal impedance" patented technology

A method of fabricating a layer of a thin film battery comprises providing a sputtering target and depositing the layer on a substrate using a physical vapor deposition process enhanced by a combination of plasma processes. The deposition process may include: (1) generation of a plasma between the target and the substrate; (2) sputtering the target; (3) supplying microwave energy to the plasma; and (4) applying radio frequency power to the substrate. A sputtering target for a thin film battery cathode layer has an average composition of LiM_aN_bZ_c, wherein 0.20>{b/(a+b)}>0 and the ratio of a to c is approximately equal to the stoichiometric ratio of a desired crystalline structure of the cathode layer, N is an alkaline earth element, M is selected from the group consisting of Co, Mn, Al, Ni and V, and Z is selected from the group consisting of (PO₄), O, F and N.

The invention discloses a ternary precursor with a controllable crystal structure, a positive electrode material and a preparation method of the positive electrode material. Specifically, a nickel-cobalt-manganese soluble salt, NaOH, concentrated ammonia water and a surfactant for oriented growth are separately formulated into solutions and then subjected to a coprecipitation reaction to obtain aternary precursor of an oriented grow structure; the precursor is mixed with a lithium source and then calcined at high temperature to obtain a ternary layered positive electrode material of an oriented grow precursor-like structure. The positive electrode material the crystal structure of which grows in a [003] direction is obtained by regulating the growth of the precursor, so that the order degree of internal structure growth is increased, the stability of internal structure growth is improved, cation mixing and Li+ diffusion resistance are reduced, and the Li+ diffusion coefficient is increased. The ternary precursor with the crystal structure controllable, the positive electrode material and the preparation method of the positive electrode material are applicable to lithium-ion powerbatteries. Compared with existing products, the ternary precursor and the positive electrode material have the advantages that the rate performance and cycle stability of lithium-ion batteries are significantly improved.

The invention belongs to the technical field of lithium ion batteries, and in particular relates to a lithium ion battery cell which comprises at least two positive electrode plates, at least two negative electrode plates, a first wound membrane and a second wound membrane, wherein the positive electrode plates and the negative electrode plates are mutually overlapped, and the difference of the number of the positive electrode plates and the number of the negative electrode plates is one; the positive electrode plates are arranged at the same side of the first membrane; the negative electrode plates are arranged at the same side of the second membrane; and at the direction from the innermost circle to the outermost circle of the battery cell, the first membrane and the second membrane are alternatively arranged between the adjacent positive electrode plates and the negative electrode plates at intervals. Compared with the prior art, the lithium ion battery cell has the advantages that the parallel connection multiple layers of electrode plates provided by the invention can be used for reducing the internal resistance of the battery cell, thus the polarization is reduced, and the discharging platform is improved; the parallel connection of the electrode plates can be used for improving the high-multiplying-power charging and discharging capability of the battery cell; and because the electrode plates of the battery cell provided by the invention are stacked together, the internal structure is unified, the stress is distributed uniformly, the possibility of deformation is small. In addition, the invention also discloses a preparation method of the battery cell.

The invention relates to a functional separator for a lithium sulfur battery, and a preparation method and application thereof, belonging to the technical field of electrochemistry. The functional separator of the invention is composed of a polymer separator matrix and a functional modification layer applied one side surface of the polymer separator matrix, wherein the functional modification layer comprises a binder, a conductive carbon material and a dendritic branched macromolecule. The adhesive of the invention has good adhesion and high stability. The conductive carbon material has a veryhigh electron conduction rate, can improve the utilization rate of the active substance and greatly reduce the internal impedance of the battery. The dendritic branch macromolecule contains more organic functional groups, the dendritic branched macromolecule has chemisorption to the polysulfide generated in the sulfur positive electrode region during the cycle, and the carbon material has physical adsorption to the dissolve polysulfide, thereby effectively inhibiting the shuttle effect in the lithium-sulfur battery. Therefore, the lithium sulfur battery prepared using the functional separatordescribed in the present invention exhibits excellent cycle performance and rate performance.

A gel electrolyte can have high proton conductivity even at conditions of no humidity and high temperatures and can have increased mechanical strength. The gel electrolyte can include an acid and a matrix polymer capable of being swollen by the acid. The matrix polymer can be a polyparabanic acid or a derivative thereof.

The invention relates to a graphene/MXene composite fiber flexible electrode material based on a solid electrolyte and a preparation method of a knittable supercapacitor. High-performance graphene oxide and MXene nanosheets are prepared through an improved Hummers method and an etching method, a macroscopic graphene/MXene composite fiber electrode material is prepared through wet spinning by meansof the liquid crystal self-assembly behavior of the graphene oxide and the MXene nanosheets, and the macroscopic graphene/MXene composite fiber electrode material is assembled into the supercapacitor. The preparation method is simple in process and low in equipment requirement, and the prepared flexible knittable supercapacitor is good in biocompatibility, has excellent electrochemical performance and good flexibility and stretchability, and can be widely applied to the fields of portable and wearable electronic equipment and the like.

The present invention relates to a solid oxide fuel cell, which comprises: a plurality of tubular electrodes, reacting gases supplying means, and a preheat piping. The tubular electrodes are concentrically arranged while enabling the polarity of a surface of any one of the plural electrodes is the same as that of the corresponding surface of a neighbor electrode faced thereto; wherein each tubular electrode further comprises an anode layer, a cathode layer, and a solid electrolyte layer sandwiched between the anode layer and the cathode layer. The supplying reacting gases means is capable of supplying fuel and gas respectively to the anode and cathode of the tubular electrodes. The preheat piping, connected to the supplying reacting gases means, collects the heat generated from the combustion reaction of residual fuel and gas, which can be utilized to preheat the gases supplying reacting means. The concentric electrode structure of the invention is compact and space saving, so that the efficiency per unit volume of the fuel cell adopting the same is enhanced. Moreover, by employing the referring fuel cell as one power generating unit, a fuel cell module can be formed by combining a plurality of the power generating units that the modularized design enables the fuel cell module to incorporate any amount of fuel cells therein with flexible formation while enabling each fuel cell of the fuel cell module to be maintained and replaced with ease.

The invention relates to an electrochemical energy source, comprising a substrate and at least one electrochemical cell deposited onto said substrate, wherein the cell comprises an anodic electrode, a cathodic electrode and an electrolyte separating said anodic electrode and said cathodic electrode and wherein the cathodic electrode comprises at least one non-oxidic composition, said composition comprising active species. The invention disclosed in this document describes how a battery, consisting of a lithium alloy anodic electrode and a cathodic electrode made of this different class of materials mentioned above, might be a suitable alternative for a battery stack comprising conventionally used materials, especially in applications in which a high current capability is essential.

The invention, which relates to an electrochromic device and a preparation method thereof, discloses a quick-response all-solid-state electrochromic device and a preparation method thereof, thereby solving problems of low preparation efficiency and low response speed of the existing electrochromic device. The quick-response all-solid-state electrochromic device comprises a substrate, a bottom electrode layer, an electrochromic layer, a complementary color-changing layer, a lithium layer and a top electrode layer. In addition, the method includes: depositing a bottom electrode layer, a electrochromic layer, a complementary color-changing layer, a lithium layer and a top electrode layer on a substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method. According to the invention, the prepared device has response time less than five seconds; and a quick-response all-solid-state electrochromic device can be obtained.

A semiconductor device, includes: a field-effect transistor that configures a charge-pump circuit; and a supporting substrate that supports the field-effect transistor so that the field-effect transistor provided on the supporting substrate becomes warpable in a channel direction.

The invention provides a discharge friction generator, the working mode of which can adopt a vertical contact-separation mode or a sliding mode, the discharge friction generator comprising: a first friction unit comprising a first electrode; a second friction unit comprising a second friction layer and a second electrode, and the second electrode is arranged on the surface, away from the first friction unit, of the second friction layer; wherein a first preset interval is reserved between the second electrode and the second friction layer, and the position of the material of the second friction layer is different from the position of the material of the first electrode in the electrostatic sequence. According to the discharge friction generator, the frictional charge induction effect is enhanced by changing different contact distances between the friction layer in the friction generator and the electrodes of the friction layer, so that more high-density currents are generated by large-scale discharge during operation, and electric signals generated by triboelectrification and the discharge effect are coupled and cooperatively output.

The invention relates to the technical field of sodium-sulfur batteries, and aims to provide a preparation method of polypyrrole quantum dots and a sodium-sulfur battery diaphragm. The preparation method comprises the following steps: adding a pyrrole solution and the DMSO solution of ferric nitrate into a solvent thermal reaction kettle together, and uniformly stirring; carrying out solvothermalreaction at the temperature of 180 DEG C for 0.5-5 h and cooling to the room temperature to obtain a DMSO solution containing the polypyrrole quantum dots. According to the preparation method, the high strength and high heat resistance temperature characteristics of PBO resin are utilized, so that the safety and reliability of a sodium-sulfur battery are greatly improved by taking the diaphragm asa raw material. Directional branch-shaped pore channels are obtained through flash freezing pore-forming, and sodium ion transmission is facilitated. The polypyrrole quantum dots are beneficial to long-chain polysulfide adsorption, the polysulfide adsorption capacity of the diaphragm is improved, a medium polysulfide concentration gradient is established in the diaphragm, the content of sodium ions is increased, the internal impedance of the sodium-sulfur battery is reduced, growth of sodium dendrites is passivated so as to prevent the sodium dendrites from penetrating through the diaphragm,the possibility that the sodium dendrites are in contact with the positive electrode in a charging and discharging process is eliminated, and short-circuiting of the battery is prevented.

The invention discloses a continuous flow magnetic induction electric field low-temperature sterilization device and method, and belongs to the field of light industry. Sterilization treatment equipment in the continuous flow magnetic induction electric field low-temperature sterilization device comprises a magnetic core, a magnet exciting coil, a magnetic coupling tube, storage tubes and treatment chambers; the magnet exciting coil and the magnetic coupling tube are both wound on two sides of the magnetic core, and the magnet exciting coil is connected with a power supply; the sterilization treatment equipment is provided with two storage tubes and two treatment chambers, wherein the two storage tubes communicate through the magnetic coupling tube; and the two storage tubes correspondingly communicate with the two treatment chambers. The sterilization temperature of the device is within the range of 60-65 DEG C, and the sterilization temperature is low; the sterilization time is shorter than 1 min, and the sterilization time is short; a metal electrode is not needed, so that electrochemical pollution is avoided; moreover, as the sterilization temperature is low and the sterilization time is short, the taste of the food materials can be better preserved when the food materials are treated; and green, low-temperature and rapid sterilization of liquid foods, seasonings, traditional Chinese medicines and cosmetics can be realized.

This invention relates to a core conduction connecting structure for secondary Li cells, in which, the core set is located in the inside of a cell tank, this invention sets a connection connecting piece as a conduction connector between positive or negative leading out terminals on the core and the cell tank and the connecting piece is composed of at least a fixed bolt and a conducting wafer of a flexure member, the either end of which is formed with a connecting end and a connecting part is formed between the two connecting ends set correspondingly outside of the positive or the negative connecting region to get the connecting ends and the connecting region contacted closely and connected electrically, and the connecting part is linked with the leading out terminals of the positive or the negative on the cell tank so as to finish the set of cells smoothly by the flexure buffer of the connecting piece even if there is error in size between the core and the tank.

The invention discloses a multi-directional multi-channel radiative confluent-structured electrode plate, using each confluent terminal on each side of the electrode plate as center point, disposing multi-directional multi-channel radiative conducting structure toward the center of the electrode plate so as to improve the equalization of whole output current of electrode plate of a storage-discharge device, and reduce the inside impedance. By the multi-channel parallel conducting effect, the invention can make electrode plate of the storage-discharge device amplify current and discharge, or equalize the whole output current of the electrode plate and reduce the inside impedance as charging by heavy current.

The invention relates to a solar cell photovoltaic module and a solar cell photovoltaic assembly. The provided solar cell photovoltaic module comprises battery pieces arranged in matrix and solder strips which connect the battery pieces arranged in matrix in series. Main gates are distributed on the light-receiving surfaces of the battery pieces. The main gates comprise row main gates and column main gates perpendicularly intersecting the row main gates. Pads at the intersections of the row main gates and the column main gates are distributed on the light-receiving surfaces of the battery pieces. Back electrodes corresponding to the pads one to one are distributed on the backlight surfaces of the battery pieces. The solder strips comprise series solder strips and interconnecting solder strips. The series solder strips connect the battery pieces in series along the column main gates into a battery string. The interconnecting solder strips connect the battery pieces on both ends of the battery string in series along the row main gates. According to the photovoltaic module, the interconnecting solder strips connect the battery pieces on both ends of the battery string in series alongthe row main gates, eliminating interconnection strips on both ends of the battery string, reducing the area occupied by the photovoltaic module, reducing the overall material cost, reducing the internal impedance, and reducing the power loss.

An electrode group E in which a positive electrode 1 and a negative electrode 2 are spirally-rolled interposing a separator 3 is contained in a bottomed cylindrical can 4. A metal exposure portion 1a provided on an end surface of the positive electrode 1 of the electrode group E or a metal-made current collecting plate 9 electrically connected to the metal exposure portion 1a (called a current collecting portion of a positive electrode) and a cover body 8 also functioning as a positive electrode terminal are electrically connected by a metal lead plate 5. One or more electrolyte resistant metal pressers 10 are arranged and electrically connected between the current collecting portion of the positive electrode and the cover body 8. The electrode group E is applied pressure by the cover body 8 and the bottom portion 4a of the bottomed cylindrical can 4.

The present invention discloses a three-phase continuous flow induction-heat green sterilization system and method and belongs to the field of light industry. A fluid system of a three-column magneticcircuit structure is used, a three-phase excitation technology based on a liquid food winding is developed, an electric power technology is integrated to design a continuous flow pipeline system, fluid food serves as a three-phase circuit, internal resistance of fluid is reduced, compared with a single-phase transformer structure, three-phase continuous flow induction-heat green sterilization system has stability and universality, and the system adopts double liquid storage tanks, further reduces the internal impedance of the fluid food, can improve induction electric field intensity and induction current density in the liquid food and can be improved by three times, and has higher sterilization efficiency. The provided three-phase continuous flow induction-heat green sterilization systemhas a sterilization temperature of 60-65 DEG C, treatment time shorter than 15 s, and can provide a green sterilization technology for many enterprises including liquid food enterprises, traditionalChinese medicine extract production plants and the like.