11results about How to "Reduce hydrogen evolution" patented technology

The invention relates to the field of aqueous zinc ion batteries, in particular to a preparation method and application of copper phosphate for inhibiting zinc dendritic crystal growth, which adopts a hydrothermal reaction method to construct a copper phosphate (CP) protective layer on the surface of a zinc anode in situ, so that more zinc-loving sites are provided, Zn < 2 + > is uniformly deposited on the anode, and the zinc dendritic crystal growth is inhibited. The Cu3 (PO4) 2 cathode prepared by the method has the advantages that the'point effect 'caused by non-uniform deposition of Zn < 2 + > is effectively reduced, the hydrophobicity of the anode side is improved, the direct contact between water and zinc in electrolyte is reduced, the hydrogen evolution and the formation of a by-product Zn4 (OH) 6SO4. XH2O are effectively reduced, and the prepared Cu3 (PO4) 2 cathode has the service life of 2000 hours compared with a pure zinc cathode (110 hours) in the test of an assembled symmetrical battery, and has the advantages of high efficiency, high safety and the like. And compared with a pure zinc negative electrode (38.69%), the total battery assembled with the MnO2 negative electrode has higher capacity retention rate (more than 66%) and longer service life (more than 3000 weeks).

The invention relates to a two-phase electrolyte and an electrochemical device, the two-phase electrolyte comprises an electrolyte salt, water and an organic solvent, the difference value of the Hildbrand solubility parameter of the water and the Hildbrand solubility parameter of the organic solvent is 13.5-15.3, and the relative dielectric constant of the organic solvent is 5-80. The water phase-organic phase in the double-phase electrolyte provided by the invention can realize spontaneous phase separation, and the double-phase electrolyte is a stable water phase-organic phase double-phase electrolyte, so that the problems of negative electrode hydrogen evolution corrosion, dendritic crystal growth and the like can be solved, and the ion transmission efficiency is improved; the battery using the two-phase electrolyte shows better long-term cycle life and high capacity retention rate.

The invention discloses a (002) crystal face oriented zinc powder negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of secondary batteries. According to the preparation method disclosed by the invention, the zinc powder is adopted as a raw material, the optimization of the form and crystal face structure of the zinc powder is realized by controlling the processes of ball milling treatment and annealing treatment, and the (002) crystal face oriented zinc powder negative electrode material is formed through induction, so that the formation of zinc dendrites is effectively inhibited, and a more compact stacking morphology is presented; and compared with the traditional zinc foil negative electrode, the utilization rate of zinc is remarkably improved, and the energy density of the battery is favorably improved.

The invention discloses a low-temperature-resistant negative electrode zinc paste and a low-temperature alkaline zinc-manganese battery containing the zinc paste. The negative electrode zinc paste comprises the following components in parts by weight: 60-65 parts of zinc powder, 1-2 parts of a composite conductive agent, 0.1-0.3 part of a composite corrosion inhibitor and 35-38 parts of a low-temperature electrolyte; the low-temperature electrolyte comprises a multi-element nonionic surfactant system, a multi-element nano anti-freezing agent system and a mixed solution A, the 3.9 ohm discharge capacity of the battery under the condition of-40 DEG C is larger than or equal to 60% compared with the capacity retention rate at normal temperature, the interface impedance amplification is smaller than or equal to 15%, the hydrogen evolution amount is reduced by 80% on year-on-year basis, the process is compatible with an existing production line, and the battery is suitable for polar scientific investigation and electronic equipment in plateau and cold regions.

The invention discloses a double-component curing filling adhesive with long operation period, low moisture absorption and low hydrogen evolution as well as a preparation method and application of the double-component curing filling adhesive. The two-component curing filling adhesive comprises a component A isocyanate phase and a component B latent amine curing agent phase, and is characterized in that the component A isocyanate phase comprises an isocyanate-terminated prepolymer, epoxy resin, hydrophobic fumed silica, silanized nano aluminum oxide and polyether modified siloxane; and the component B latent amine curing agent phase comprises an acylphosphine oxide photoinitiator, a 4, 4 '-diaminodiphenylmethane curing agent microcapsule, a Lewis acid inhibitor and a hydrogen inhibitor. The two-component curing filling adhesive disclosed by the invention has an operation period of 12 hours; the double-component curing filling adhesive is used for bonding optical fibers, the hydrogen evolution amount (24h, 80 DEG C) is 0.15 mu L / g, and the moisture absorption weight gain rate is 0.13%; the double-component curing filling adhesive prepared by the invention can be completely cured within 120 minutes when being heated at 40 DEG C under 365nm ultraviolet radiation.

The invention relates to the field of aqueous zinc ion batteries, a simple coprecipitation method is adopted, a basic copper nitrate protective layer is coated on the surface of a zinc anode, on one hand, the basic copper nitrate protective layer has a unique hydrophobic structure, so that H2O molecules in a solution are not easily in direct contact with Zn, a series of side reactions such as hydrogen evolution and a by-product Zn4 (OH) 6SO4. XH2O caused by H2O erosion are greatly reduced, and on the other hand, the basic copper nitrate protective layer has a unique hydrophobic structure. The uniformly distributed CNO provides more sites for Zn < 2 + > nucleation, so that Zn < 2 + > is uniformly deposited on the surface of the negative electrode in the deposition process, the'point effect 'caused by non-uniform deposition of Zn < 2 + > is effectively reduced, and the prepared CNO-Zn negative electrode has the service life of 1600 hours in a test of an assembled symmetrical battery compared with a pure zinc negative electrode, and has the advantages of high stability, high reliability and the like. In a coulombic efficiency test, a half cell assembled with a Cu foil can be circulated for 1600 cycles relative to a bare Zn electrode (190 cycles) CNO (at) Zn half cell, and the coulombic efficiency is stabilized at 99.8%. And compared with a pure zinc negative electrode, the total battery assembled with the Al-MnO2 negative electrode has higher capacity retention rate and longer service life.

The invention provides a preparation method of a porous carbon-loaded zinc and carbonization-coated zinc negative electrode material and a preparation method of a nickel-zinc battery, and the preparation method of the porous carbon-loaded zinc and carbonization-coated zinc negative electrode material comprises the following steps: soaking hollow porous carbon skeleton particles in a zinc plating electrolyte for electrochemical deposition, obtaining galvanized porous carbon particles; baking the galvanized porous carbon particles, adding a phenolic resin solution and a curing agent after baking, and stirring to obtain a phenolic resin galvanized precursor; the phenolic resin zinc plating precursor is introduced into a protective atmosphere for heating and carbonization, and a carbon-coated material is obtained; and adding a silane coupling agent into the carbon-coated material, and drying to obtain the zinc negative electrode material. Zinc is deposited on a hollow porous carbon skeleton, so that the electrochemical performance is improved, and zinc dendrites are prevented; phenolic resin is carbonized and coated with a carbon layer, so that electrolyte is blocked, and side reaction is reduced; the silane coupling agent improves the interface bonding force and improves the interface compatibility between the zinc negative electrode material and the negative electrode binder.

The invention discloses low-viscosity and high-strength optical fiber coloring ink based on a novel photoinitiator system as well as a preparation method, a use method and application of the low-viscosity and high-strength optical fiber coloring ink. The optical fiber coloring ink is prepared from the following components in parts by weight: 30 parts of polyurethane acrylate, 20 to 30 parts of epoxy acrylate, 10 parts of reactive diluent, 2 to 10 parts of coloring pigment, 1.5 to 3 parts of bis (2, 4, 6-trimethylbenzoyl) phenylphosphine oxide (BAPO), 0.5 to 1.0 part of isopropyl thioxanthone (ITX) and 0.3 to 0.8 part of 2, 4, 6-tri (dimethylaminomethyl) phenol (DMP-30). The optical fiber coloring ink provided by the invention has extremely low hydrogen evolution amount (24h, 100 DEG C) of 0.37 [mu] L / g. The optical fiber coloring ink has low viscosity (2020 mPa.s, 25 DEG C) and high tensile shear strength (13.7 MPa), and compared with existing optical fiber coloring ink, the viscosity is reduced by 50%, the tensile shear strength is improved by 20%, and the curing degree is improved by 8%.

The invention relates to the technical field of electrochemical energy storage, in particular to an aqueous zinc battery electrolyte system for a high-current-density condition and application of the aqueous zinc battery electrolyte system. The aqueous zinc battery electrolyte system comprises zinc salt and a first organic additive, the first organic additive comprises 1, 4-butynediol. According to the electrolyte system with the 1, 4-butynediol as the main interface regulation component and the application of the electrolyte system, hydroxyl and acetylenic bonds in 1, 4-butynediol molecules can act on a water molecule hydrogen bond network and the surface of metal zinc in a synergistic mode, the crystal face orientation and interface reaction kinetics of zinc deposition are regulated and controlled, therefore, disordered growth of zinc dendrites is inhibited, and the service life of the electrolyte system is prolonged. And a uniform and compact deposition layer is obtained.

The present invention discloses a non-inductive charger with dual PWM modulation. The charger includes an MCU control circuit, a dual PWM high-frequency switching circuit, a high-frequency power transformer circuit, and a C filter output circuit; the control mode of the dual PWM high-frequency switching circuit is to add an intermittent PWM on the basis of the traditional power PWM modulation, thereby forming a dual PWM modulation. Due to the application of dual PWM, the L filter inductor may not be required in the output rectifier filter circuit, thereby saving costs and increasing the reliability of the charger. In addition, due to the application of dual PWM, intermittent charging pulses are generated, so such a charger is conducive to desulfurization, reducing hydrogen evolution, reducing water loss, controlling thermal balance, enhancing the electrochemical reaction of the battery, extending the service life of the battery, increasing the charging power to shorten the charging time, improving the battery capacity, and increasing the range of the electric vehicle.

The application discloses a kind of zinc negative electrode PVA / porous carbon array protective layer femtosecond laser preparation method, zinc negative electrode material and its application, to solve zinc negative electrode dendrite growth, corrosion passivation, hydrogen evolution side reaction highlights and the problems such as existing protective layer preparation process is complex, structure regulation precision is low.The preparation method includes three steps: S1 PVA is mixed with deionized water, heated and stirred to form a semi-thick solution;S2 the solution is uniformly coated on the surface of zinc foil, and a PVA protective layer is formed after drying;S3 PVA protective layer is decomposed by femtosecond laser, and a porous PVA / porous carbon array composite protective layer is prepared.The composite protective layer enhances the interface stability through PVA, and the synergistic effect of porous carbon guiding zinc ion uniform deposition effectively inhibits dendrite growth and corrosion reaction.The application process is simple, raw materials are environmentally friendly and cost is relatively low, suitable for mass production, and provides key technical support for commercialization of aqueous zinc ion battery.