40results about How to "Improve the electrochemical reaction speed" patented technology

The invention relates to a method for degrading organic substances by using photoelectric catalysis of a short TiO nano-tube array film electrode, and belongs to the technical field of environment polThe invention relates to a method for degrading organic substances by using photoelectric catalysis of a short TiO nano-tube array film electrode, and belongs to the technical field of environment pol tube length as the electrode, the method has the advantages of low photo-generated charge compound and quick transmission, and shows higher property of degrading the organic substances by photoelecer tube length as the electrode, the method has the advantages of low photo-generated charge compound and quick transmission, and shows higher property of degrading the organic substances by photoelectric catalysis.tric catalysis.lution governance. A cleaned titanium sheet as an anode is placed into an electrolyte solution containing fluorine ions, a platinum electrode as a counter electrode is subjected to anode oxidizing realution governance. A cleaned titanium sheet as an anode is placed into an electrolyte solution containing fluorine ions, a platinum electrode as a counter electrode is subjected to anode oxidizing reaction, the reacted electrolyte solution is subjected to ultrasonic dispersion during the whole anode oxidizing reaction, and the reactants are sintered after the anode oxidization is ended to obtain tction, the reacted electrolyte solution is subjected to ultrasonic dispersion during the whole anode oxidizing reaction, and the reactants are sintered after the anode oxidization is ended to obtain the short TiO2 nano-tube array film electrode. By using the obtained short TiO2 nano-tube array film electrode as a working electrode, Ag-AgCl as a reference electrode and Pt as the counter electrode,he short TiO2 nano-tube array film electrode. By using the obtained short TiO2 nano-tube array film electrode as a working electrode, Ag-AgCl as a reference electrode and Pt as the counter electrode,0.01 to 1 mole of sodium sulfate solution is added into organic pollutant solution, and then the organic pollutants can be degraded. By adopting the firm TiO2 nano-tube array film electrode with short0.01 to 1 mole of sodium sulfate solution is added into organic pollutant solution, and then the organic pollutants can be degraded. By adopting the firm TiO2 nano-tube array film electrode with shorter

The invention discloses an application of a zinc-based ternary layered composite oxide to a zinc-nickel battery electrode material. The zinc-based ternary layered composite oxide is obtained by calcining carbonate type ternary zinc-based hydrotalcite; the ternary zinc-based hydrotalcite is prepared from zinc nitrate and two selected from divalent metal oxides and trivalent metal nitrates without the zinc nitrate. The zinc-based ternary layered composite oxide is used as an active substance so that the deformation of a zinc cathode is weakened, the dissolution of the active substance of the zinc cathode is inhibited, the reversibility of a zinc-nickel battery electrode is improved and the service life of the zinc-nickel battery electrode is prolonged.

The invention relates to a fuel cell technology, and aims to provide preparation of a monatomic palladium catalyst and application of the monatomic palladium catalyst in a direct formic acid fuel cell. The preparation method comprises the following steps of: preparing an o-phenylenediamine cyclodextrin inclusion compound from o-phenylenediamine and [beta]-cyclodextrin, adding the o-phenylenediamine cyclodextrin inclusion compound into a chloropalladic acid solution, and performing stirring to obtain a palladium coordinated o-phenylenediamine cyclodextrin inclusion compound solution; adding sodium chloride, carrying out liquid nitrogen flash freezing, and performing drying to obtain a precursor; carbonizing the precursor under the protection of nitrogen atmosphere, performing cooling, washing and drying to obtain the monatomic palladium catalyst. The technical route is simple, universality is achieved, and generation of impure phases can be avoided. The monatomic palladium catalyst hashigher electrocatalytic activity, and the cost can be effectively reduced. The co-catalytic application of the monatomic palladium catalyst and the cocatalyst (VO)SO4 provides a new thought for the design and performance improvement of the direct formic acid fuel cell, and is beneficial to the commercial development of the fuel cell.

The invention discloses an application of a zinc-based binary layered composite oxide to a zinc-nickel battery electrode material. The zinc-based binary layered composite oxide is obtained by calcining carbonate type binary zinc-based hydrotalcite; the binary zinc-based hydrotalcite is prepared from zinc nitrate and one selected from trivalent metal oxides. The zinc-based binary layered composite oxide is used as an active substance so that the deformation of a zinc cathode is weakened, the dissolution of the active substance of the zinc cathode is inhibited, the reversibility of a zinc-nickel battery electrode is improved and the service life of the zinc-nickel battery electrode is prolonged.

The invention discloses a thermal management system of an electric automobile, comprising a temperature sensor, a heating and cooling device and a central processing unit, wherein the temperature sensor is used for acquiring the temperature of components generating the raising and the drop of temperature in the electric automobile; the heating and cooling device is used for generating a heat source and a cold source which are transmitted to components needing heating and cooling and is connected with the signal output end of the central processing unit through a control switch; and the central processing unit is used for receiving a signal of the temperature sensor and calculating and outputting the control signal to the heating and cooling device. In the invention, the temperature conditions of various components can be detected by using the temperature sensor and are transmitted to the central processing unit which controls the temperature in time so as to ensure that the temperatures of various components are in a proper range. The system not only can be used for monitoring the temperature of batteries, but also can be used for monitoring the temperature of a motor and a motor controller, thereby avoiding the motor and the motor controller from being damaged due to overhigh temperature. The system can also be used for monitoring the temperature in a carriage and ensures thecomfort degree of the moving space of people.

The invention discloses a molybdenum diselenide / carbon nanotube array composite electrode, a preparation method and an application. Sodium molybdate, selenium powder and sodium borohydride are mixed according to a molar ratio of 1:3:1 and dissolved in deionized water. and anhydrous ethanol, then put the carbon nanotube array into the mixed solution, and conduct a hydrothermal reaction at 180-220°C for 36-48 hours to obtain a molybdenum diselenide / carbon nanotube array composite electrode; disselenide The molybdenum / carbon tube array composite electrode film is pressed on the current collector by pressure to obtain the supercapacitor electrode. In the present invention, molybdenum diselenide and carbon nanotube arrays are combined as an electrode material, and its specific surface area is greatly increased, and it has more abundant active sites, and these advantages enable its high theoretical specific capacity to be fully utilized. No binder is added when preparing the composite electrode, which not only reduces the weight of the entire electrode, but also makes the active component and the current collector directly and tightly combined, greatly reducing the contact resistance of the electrode.

The invention relates to a sodium-sulfur battery positive electrode material and a preparation method thereof. The sodium-sulfur battery positive electrode material is a sulfur-titanium dioxide-carboncomposite material, and the preparation method includes the following steps: firstly, preparing a metal organic framework material MIL-125, spray-drying and compounding the metal organic framework material MIL-125 with graphene, performing carbonization treatment to obtain a titanium dioxide-carbon composite material, and then doping sulfur to prepare a sulfur-titanium dioxide-carbon composite sodium-sulfur battery positive electrode material by using a ball milling method and a hot melting method. The composite material prepared by using the method has a larger specific surface area and porosity, can limit the 'shuttle effect' of polysulfide, reduces the dissolution of intermediate products, can improve the electrochemical activity of elemental sulfur, shortens the transmission paths ofelectrons and ions, limits the dissolution of polysulfide, and improves the electrochemical reaction speed of active materials adsorbed on the surface of a carrier.

The invention discloses a polar plate of a fuel cell, wherein, one surface of the polar plate is provided with a channel, the channel comprises two groups of intake channels and one group of outgassing channels, the two groups of intake channels are respectively positioned at the two sides of the outgassing channel, a separator is arranged between the each group of intake channels and the outgassing channel, and the separator separates the intake channel from the outgassing channel so as to impel gas to enter a gas diffusion layer adjacent to the separator in a compulsory convective way. The arrangement of the two groups of intake channels and the separator can effectively reinforce the compulsory convective diffusion effect of flows in the channel of the polar plate, can carry away surplus moisture accumulated in the gas diffusion layer, and can increase the generation efficiency of the fuel cell.

The invention relates to a lithium-sulfur battery cathode material and a preparation method thereof. The method comprises: preparing a mixed solution of N,N-dimethylformamide, methanol, and phthalic acid, ultrasonically dispersing and adding tetrabutyl titanate, and placing it in a polytetrafluoroethylene-lined reaction kettle at 120- The metal-organic framework material MIL-125(Ti) was prepared by reaction at 150°C; the MIL-125(Ti) was placed in a cobalt acetate solution, and after centrifugation, it was calcined at a high temperature under an argon atmosphere to obtain tricobalt tetroxide / titanium dioxide / carbon composite material; After ball milling and mixing with pure-phase nano-sulfur powder, heat treatment under nitrogen protection to obtain sulfur-cobalt tetroxide / titanium dioxide / carbon composite material. The material organically combines cobalt tetroxide / titanium dioxide / carbon, and the adsorption of carbon material pores can limit the "shuttle effect" of polysulfides, inhibit the dissolution of intermediate products through adsorption and catalysis, and improve the surface activity of adsorption on the carrier The electrochemical reaction speed of the material is improved, and the capacity and cycle performance of the Li-S battery are improved.

The invention discloses a negative pressure forming method and a battery. The method comprises the following steps: vacuumizing, charging and standing the semi-finished electric core to obtain the formed electric core; the vacuuming and charging are carried out in multiple steps, and the vacuum degree between each step is gradually reduced and the charging current is gradually increased big. The method provided by the invention can shorten the formation time, reduce the liquid loss during the formation process, improve the consistency and stability of the SEI film, improve the cycle performance of the battery, and meet the requirements of high specific energy, fast charging, and long life of the power battery for new energy vehicles. It is especially suitable for the formation of lithium-ion batteries.