114results about How to "Lower polarization resistance" patented technology

The invention relates to a pulse container formation method for a high-capacity lead-acid battery. The low-frequency positive pulse container formation process is divided into five stages: container formation guide, low-frequency positive pulse formation, low-frequency positive pulse formation, low-frequency positive pulse formation charging, and container formation finishing. The method can shorten the formation time of a high-capacity valve-control seal lead-acid battery, ensure the battery quality, shorten the formation charging time, enhance the production efficiency, reduce the battery occupation site and lower the production cost.

The invention relates to a solid oxide fuel cell, in particular to medium temperature solid oxide fuel cell cathode material and application thereof. Being calculated by a weight percentage, the cathode material consists of 40-99 percent of perovskite-type composite oxides, 1-30 percent of CeO2 doped with rare earth oxides, and 0-59 percent of electrolyte material; the electrolyte material refers to ZrO2 stabilized by 5-20 mol percent of Y2O3 and / or ZrO2 stabilized by 5-20 mol percent of Sc2O3. The invention can change the structure of the active components of the cathode material, can improve the activity of the catalytic oxygen reduction reaction of the cathode material, can accelerate the dissociative adsorption of oxygen on the surface of the cathode material, the diffusion of oxygen species on the surface of the cathode material, the transmission process of the oxygen species in a three-phase bounded domain, charge transfer, and other electrochemical processes, and can increase the activity of the cathode of the solid oxide fuel cell.

The invention relates to a solid oxide fuel cell, in particular to an intermediate-temperature solid oxide fuel cell membrane electrode component and a preparation thereof. The solid oxide fuel cell membrane electrode assembly comprises an anode substrate, a zirconium-based electrolyte membrane and an intermediate-temperature cathode, wherein, the intermediate-temperature cathode is made of 40-80% of perovskite type cathode material and 20-60% of cerium-based electrode material; and a transition layer made of 20-60% of the zirconium-based electrolyte material and 40-80% of the perovskite type cathode material is prepared between the zirconium-based electrolyte membrane and the intermediate-temperature cathode. The intermediate-temperature solid oxide fuel cell prepared by adopting the method of the invention improves the performance of the solid oxide fuel cell by more than 65% compared with that of the cell without the transition layer, and the combination of the intermediate-temperature cathode and the electrolyte membrane is more stable and reliable, which improves the operation stability and the thermal cycling stability of the cell.

The invention discloses a non-aqueous electrolyte of high-voltage lithium ion batteries. The non-aqueous electrolyte comprises following ingredients: a cyclic carbonate, a linear carbonate, a lithium salt and an additive. The cyclic carbonate and the linear carbonate are mixed at a mass ratio of 1:1-3; the molar concentration of the lithium salt in the mixed solution composed by the cyclic carbonate and the linear carbonate is 0.8 to 1.5mol/L; the additive is thienyl thioether compound, and the mass of the additive is 0.01 to 1% of the mass of the solvent. The thienyl thioether compound is capable of forming a polythiophene membrane on the surface of an anode. The anode is coated by the polythiophene membrane, so that conductivity of the material is increased, electrode impedance is decreased, further contact of the electrolyte and the surface of materialis avoided, side reactions are reduced, room temperature cycling performance of the electrolyte is improve effectively, and a problem that the cycling performance of the batteries is poor under high voltage is solved.

The invention discloses a preparing method for lithium nickel manganese oxygen covered with lithium titanate. The method comprises the following steps that firstly, Ni, Mn and M are added into pure water, and a mixed solution with the total molar concentration ranging from 1.0 mol/L to 3.0 mol/L is obtained; secondly, a complexing agent solution is added into the mixed solution, the pH value is mixed to be ranging from 9 to 12, and a supernatant solution is obtained; thirdly, the supernatant solution is oxidized, the solid centrifugal separation is carried out, drying is carried out, and precursor powder is obtained; fourthly, Li source compound is mixed with the precursor powder, a first time sintering is carried out, LiNi (0.5-x) Mn (1.5-y) M (x+y) O4 is obtained, pure water adding and the drying are carried out on the LiNi (0.5-x) Mn (1.5-y) M (x+y) O4, second Li source compound and TiO2 powder, and a mixed solid material is obtained; sixthly, secondary sintering is carried out on the mixed solid material, and an electrode material covered with the lithium titanate is obtained. According to the prepared electrode material covered with the lithium titanate, the cycle performance and the rate performance of the electrode material can be effectively improved.

The invention discloses a preparation method of a LiFePO material, a lithium ion battery using the material and a positive plate thereof. The preparation method comprises the following steps: sintering to prepare LiFePO powder; cladding aluminum on the surface of the LiFePO powder particle to form a LiFePO-Al composite material. Compared with the prior art, the LiFePO material prepared by the invention and the cladding aluminum can carry out homodisperse and surface cladding at the molecule level; the conductivity of the electrode plate prepared by the invention is improved by 101-10001 times; and the internal resistance of the LiFePO lithium ion battery is reduced greatly, and the large-current charge-discharge property is obviously improved, thus the material is particularly suitable for a high power lithium ion battery. Compared with the other cladding elementary metal, Al metal is cheaper, has lighter mass, lower melting point, more stable electrochemistry property and the like; and in additional, the aluminum in the composite material and a positive pole current collector are made of the same material, so that primary battery corrosion effect can not be formed.

The invention relates to a battery structure of a proton conductor fuel cell with a full B-site defect and a preparation method thereof. The constituent formula of the electrolyte material is Ba(Zr0.1Ce0.7Y0.1Yb0.1)xO3-delta(BZCYYb-x); and the constituent formula of the cathode material is Ba(Co0.4Fe0.4Zr0.1Y0.1)xO3-delta(BCFZY-x), wherein the x represents the defect amount of the B site element,0.9<=x<=1, and delta represents the oxygen vacancy content. The electrochemical performance of the fuel cell is improved by carrying out B-site ion defect on perovskite materials BaZr0.1Ce0.7Y0.1Yb0.1O3-delta and BaCo0.4Fe0.4Zr0.1Y0.1O3-delta; the Ba(Zr0.1Ce0.7Y0.1Yb0.1)xO3-delta material with the B-site defect is improved in sintering performance, oxygen permeability, proton conductivity and lowtemperature resistance; and the Ba(Co0.4Fe0.4Zr0.1Y0.1)xO3-delta material is improved in oxygen reduction reaction (ORR), area specific impedance and dual ion exchange capacity.

The invention relates to a method for making a lead-acid battery pole plate, which is characterized by comprising the following steps: adopting a foamy carbon with a three-dimensional structure as a skeleton, and electroplating lead or lead alloy on the skeleton to obtain a grid; coating active materials on the grid, and solidifying and drying the grid; and casting a lead or lead-alloy frame on the grid subjected to solidification and drying to obtain the lead-acid battery pole plate. The lead-acid battery pole plate is environment-friendly, can greatly reduce the lead consumption and significantly reduce the weight of the battery pole plate, and can three-dimensionally contact the active materials so as to make the current and potential distributed more uniformly on the battery pole plate, thereby reducing the electrochemical polarization and polarization resistance on the surface of the battery, facilitating the transformation of the active materials, and improving the utilization ratio and specific energy of the active materials. The lead-acid battery pole plate prepared by the method adopts the lead or lead-alloy frame, can facilitate process after-treatment, and has good process processability.

The invention relates to a high-catalytic activity composite negative electrode material of an intermediate-temperature solid oxide fuel cell and a preparation method of the composite negative electrode material, and belongs to the technical field of an energy material. The composite negative electrode comprises a perovskite structured oxide PrBa<1-x>Co<2>O<6-Delta>, Pr<1-y>BaCo<2>O<6-Delta> or Pr<1-n>Ba<1-m>Co<2>O<6-Delta> in the absence of A-position cation and an oxygen ion conductor material Sm<0.2>Ce<0.8>O<1.9> or Gd<0.1>Ce<0.9>O<1.95>, wherein the mass percent of the oxygen ion conductor material accounts for 20-50%. The preparation method of the composite negative electrode material comprises the following steps of firstly, respectively preparing synthesis solutions of two constituents; secondly, mixing and uniformly stirring the two solutions to obtain a mixed synthesis solution of the two constituents, and heating the mixed synthesis solution to obtain mixed precursor gel; and finally, carrying out high-temperature sintering reaction to obtain composite negative electrode powder. The composite negative electrode material is prepared by a synchronous sintering reaction method, the preparation method has the advantages of simplicity in process, short preparation period, low cost and high efficiency, and is easy to operate, and the oxygen reduction catalytic activity of the negative electrode of the intermediate-temperature solid oxide fuel cell is effectively improved.

The invention discloses a preparation method of a textile electrode material and the textile electrode material. The preparation method comprises the steps that firstly, pretreated fabric is soaked ina dopamine hydrochloride solution, and polydopamine coated fabric is obtained; then, the polydopamine coated fabric is soaked in a silver-ammonia solution, a glucose solution is added after a certainperiod of time, and a silver-plated fabric is obtained; the silver-plated fabric is subjected to chlorination treatment in a sodium chloride solution through an electrochemical method, and a silver-silver chloride composite coating fabric is formed; finally, the silver-silver chloride composite coating fabric is modified in a conductive polymer monomer solution through an electrochemical method,and the silver-silver chloride-conductive polymer composite coating fabric is obtained. The surface specific resistance of the textile electrode material is 0.01-5 omega, the polarization impedance ina 0.9% sodium chloride solution is 10-1000 omega, the skin interface impedance is 1K omega-100M omega at 1Hz, and the phase angle variation within the frequency range of 0.5-50Hz is 0-30 degrees.

This invention relates to a power generating apparatus including two systems. In one of the systems, a hydrogen gas is generated by hydrolysis, and a hydrogen demanding unit generates electric power. In the other system, electric power is generated based on an oxidation-reduction chemical reaction of an electrode and ions.

The invention provides a large-capacity graphene battery capable of rapidly charging, and relates to the technical field of batteries. The large-capacity graphene battery capable of rapidly charging,fabricated by the invention, comprises a positive pole plate, a negative pole plate, a separator, an electrolyte and a battery shell, the phenomena of small storage capacity and slow charging speed ofan existing graphene battery are solved, meanwhile, the corrosion resistance of the battery is improved, the service lifetime is prolonged, the large-capacity graphene battery is relatively good in stability, and no harm to a human body and an environment is generated; and compared with a traditional market graphene battery, it is verified that the charging time is obviously shortened by 34.94% under the same charging condition, and the charge-discharge efficiency of the battery can reach 87.73%.

A lithium ion flow battery comprising cathode current collectors (21), an anode current collector (22), a cathode reaction chamber (24), an anode reaction chamber (25), a separator (23), a cathode suspension solution (26) and an anode suspension solution (27), wherein the cathode and anode current collectors are located at both sides of the separator respectively and are in close contact with the separator to form sandwich composite structure layers of the cathode current collector, the separator and the anode current collector; and in that several sandwich composite structure layers are arranged in sequence in an order that current collectors with the same polarity are oppositely arranged, and the electrode suspension solution continuously or intermittently flows in a battery reaction chamber between adjacent sandwich composite structure layers. Thus, the size of the battery reaction chamber can be flexibly designed according to the viscosity of the electrode suspension solution without increasing the polarization internal resistance of the battery, thereby solving the restriction conflict existing in the existing lithium ion flow battery between the size of the battery reaction chamber and the polarization internal resistance of the battery.

The invention discloses a molybdenum disulfide nanosheet and a preparation method thereof. The molybdenum disulfide nanosheet is prepared by adopting a magnetron reactive sputtering method, metal molybdenum is taken as a target material and argon gas is used as sputtering gas, hydrogen sulfide is taken as reactive gas, and a metal sheet is used as a substrate. As a negative electrode material for a lithium ion battery, the molybdenum disulfide nanosheet has relatively high lithium storage performance, excellent charge-discharge cycle performance and rate capability. As an electrocatalytic hydrogen evolution electrode material and a fuel cell negative electrode material, the molybdenum disulfide nanosheet effectively reduces the electrode over-voltage and reduces the polarization resistance of the electrode.

The invention provides a medium-low-temperature solid oxide fuel cell negative electrode material. The negative electrode material has the general formula of Sr<1-x>R<x>CoO<3-delta>, wherein x is greater than or equal to 0.01 and less than or equal to 1.0, <delta> is greater than or equal to 0 and less than or equal to 0.5; and R is Pr, Y, Nd, Dy or Gd. The invention also provides a preparation method of the medium-low-temperature solid oxide fuel cell negative electrode material. By adopting a dual chelating agent sol-gel technology, the medium-low-temperature solid oxide fuel cell negative electrode material with uniform particles is prepared, so that the perovskite structure of SrCoO<3-delta> is stabilized, relatively high electrical conductivity is achieved in the air, high catalytic activity is shown within a range of 500-800 DEG C, high compatibility with electrolytes LSGM and SDC can be achieved, and high stability and electrochemical performance are shown within a medium-low-temperature temperature.

The invention discloses a doped cerium oxide film with a preferred exposed crystal face. The film can be used as the electrode of a solid oxide fuel battery, and can also be used as a catalyst for catalytic reactions. The film is prepared through a magnetron reactive sputtering technology. The application of the doped cerium oxide film with a preferred exposed crystal face can effectively improve the electro-catalytic activity of negative electrode (for oxygen gas) and positive electrode (for fuel gas) of a solid oxide fuel battery, the battery polarization resistance is reduced, and the medium-low temperature performance of battery is effectively improved.

The invention relates to the technical field of battery preparation, and relates to a preparation method of a cylindrical mixed solid-liquid lithium ion battery. Uniform composite electrolyte sol is applied to both sides of a PE film by pulling. A porous PE film with a mature preparation process is used as a support, and electrolyte sol is applied to both sides of the PE film (i.e. a support film). A PE film-gel composite electrolyte film is prepared through heat treatment at high temperature. The strength of the PE film is enhanced. The PE film has good lithium ion conductivity and has good property of interface binding with cathode/anode plates.

The invention discloses a redox flow cell stack. The redox flow cell stack is formed by connecting a plurality of single batteries in series, wherein each single battery comprises a bipolar plate, an electrode, an electrode frame and an ion conduction film, and in the cell stack, a part structure comprising the single battery at an initial section and/or a tail section is different from a part structure comprising other single batteries. By improving the structures of the batteries at the initial section and the tail section, the bipolar plate of the single battery at the initial section or the tail section is changed to a material with relatively small conductivity and relatively large roughness, the ion conduction film of the battery at the initial section or the tail section is changed to a film material with relatively small resistance and more excellent performance, so that the voltage range of the refox flow cell stack is effectively reduced, the voltage consistency of the single battery in the cell tack is greatly improved, the unfavorable influence on a battery system due to long-term running of the cell stack in a relatively high voltage range is prevented, and the long-term running stability of the battery system is improved.

The invention discloses a method for preparing composite cathode materials RBCO-xCGO of SOFC by an in-situ colloidal composite method, belongs to the field of SOFCs, particularly relates to the method for preparing the composite cathode materials RBCO-xCGO of SOFC by the in-situ colloidal composite method, and aims at solving the problems of poor mixing uniformity of the conventional mechanical mixing method and nonuniform distribution of impregnated particles of a sol impregnation method. The method comprises the following steps: 1, preparing ReBaCo2O6-delta precursor sol; 2, preparing CGO hydrosol; 3, preparing RBCO-XCGO composite materials. The cathode materials and electrolyte materials are once compounded in situ in a liquid phase system, without the step of secondary impregnation to ensure the uniformity of the composite materials. CGO nanoparticles effectively prevent agglomeration of the cathode materials in the high-temperature sintering process, thereby being beneficial to improving electrode performances.