32results about How to "Reduce decomposition voltage" patented technology

The invention provides a positive electrode lithium supplementing method of a lithium ion battery, a product of the positive electrode lithium supplementing method and an application of the product. The positive electrode lithium supplementing method comprises the steps that a positive electrode active substance, auxiliary materials and a positive electrode lithium supplementing agent are mixed through a dry method, a mixed powder is obtained, then a lithium supplementing positive electrode pole piece is prepared, and the positive electrode lithium supplementing agent comprises Li3N. Accordingto the method, an operation process is simplified, and consumption of a side reaction between Li3N in the positive electrode lithium supplementing agent and a solvent is avoided by dry mixing so thata lithium supplementing effect is improved, the lithium supplementing positive plate with correspondingly improved porosity is obtained, and a first effect, the energy density, the cycle performanceand the rate capability of a battery cell are improved; and after lithium supplementation, byproduct nitrogen of the positive electrode lithium supplementation agent Li3N is removed by negative pressure in a formation stage so that the structure and the performance of the battery are not influenced. The positive electrode lithium supplementing method has the characteristics of low cost, simplicityand convenience in operation and a good lithium supplementing effect.

The invention provides an electrochemical synthesis method of a thiazoles compound and belongs to the technical field of thiazoles compound preparation. According to the method, in a single-chamber electrolytic tank, 2,5-thiazoline is used as a raw material, in an electrolytic solution, bromide and tetrachlorohydroquinone serve as catalysts, electrolysis is carried out on the condition without adding supporting electrolyte and additive, the reaction temperature ranges from 40 DEG C to 80 DEG C, current density ranges from 1 mA/cm2 to 5 mA/cm2, and after 3.0-4.0 F/mol of electric quantity is introduced, the 1,3-thiazole compound is obtained. According to the method, the electrochemical catalysis indirect electrolysis method easy to operate is adopted firstly to synthesize the 1,3-thiazole compound, the single-chamber electrolytic tank is used, constant-current electrolysis is adopted, a graphite flake electrode is used as a working electrode, use of chemometry oxidizing agents is avoided, atom economy is achieved beneficially, the cost is reduced greatly, operation is easy, and industrialized production is achieved beneficially.

The invention relates to an ionic membrane electrolytic bath device for preparing alkali through an oxygen cathode, which mainly comprises an anode of the ionic membrane electrolytic bath and a cathode of the ionic membrane electrolytic bath, wherein a cathode gas chamber and a cathode liquid chamber are arranged on the side of the cathode of the ionic membrane electrolytic bath; and an oxygen cathode diffusion electrode (17) is arranged between the cathode gas chamber and the cathode liquid chamber and consists of a waterproof layer (24), a catalyst layer (25) and a conductive net (26) in turn. Oxygen is introduced into the cathode gas chamber (7) and is converted into OH- together with H2O to enter the cathode liquid chamber (2) under the action of the oxygen cathode diffusion electrode(17); therefore, NaOH is generated in the cathode liquid chamber (2), and H2 is not separated out of the cathode of the ionic membrane electrolytic bath. Due to a chemical reaction of 2H2O+1/2O2+2e=2OH- at the cathode of the alkali-preparing device, the decomposition voltage is reduced by 1.22V, and electricity can be saved by over 56 percent on the basis of standard potential estimation.

The invention belongs to the field of water electrolysis, and particularly relates to a composite membrane for acid-base water electrolysis as well as preparation and application thereof. The raw materials are polybenzimidazole and C3N4, wherein the mass fraction of the C3N4 is 0.1-1.5 wt.%. The preparation method comprises the steps of preparing polybenzimidazole and C3N4 nanosheets, respectivelydispersing PBI and C3N4 nanosheets in a solvent to obtain a PBI solution S1 and a C3N4 nanosheet dispersion solution S2, uniformly mixing S1 and S2, stirring to obtain a membrane casting solution S3,casting the membrane casting solution S3 on plate glass with a groove, and carrying out vacuum drying to obtain the composite membrane for acid-base water electrolysis. The composite membrane has good mechanical properties, can significantly reduce the decomposition voltage of water electrolysis and reduce energy consumption when applied to acid-base water electrolysis, and shows good battery performance.

The invention provides a lithium supplement method of a lithium ion battery, which comprises the following steps: charging the lithium ion battery by using a first voltage to decompose a first lithium supplement material, performing first lithium supplement on the lithium ion battery, and charging the lithium ion battery by using a second voltage when the capacity of the lithium ion battery is reduced to a preset threshold value, the lithium supplement materials in the two active material layers are decomposed at different time, so that the purpose of secondary lithium supplement is achieved, the addition amount of the lithium supplement materials is improved, and the defects that in the prior art, the lithium supplement materials are too high, so that lithium precipitation of a negative electrode is easily caused, and the lithium supplement efficiency is high are overcome. And the expected effect cannot be achieved due to too few lithium supplementing materials, and the service life of the lithium ion battery is greatly prolonged.

The invention provides an electrolyte additive capable of catalyzing decomposition of a lithium supplement agent and application thereof, the electrolyte additive capable of catalyzing decomposition of the lithium supplement agent comprises crown ether, linear ether, a nitrogen-containing polydentate coordination compound and fluorobenzene, when the electrolyte additive is applied to a battery system containing the lithium supplement agent, decomposition of the lithium supplement agent can be promoted, decomposition voltage of the lithium supplement agent can be reduced, and the lithium supplement agent can be effectively prevented from being decomposed. Meanwhile, the cycling stability of the battery can be improved.