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

The application provides a method for replenishing lithium for a lithium-ion battery, including charging the lithium-ion battery with a first voltage, causing the first lithium-replenishing material to decompose, and replenishing the lithium-ion battery for the first time. When the capacity of the lithium-ion battery drops to the preset threshold, the lithium-ion battery is charged with the second voltage, so that the second lithium-supplementing material decomposes, and the lithium-ion battery is supplemented with lithium for the second time, so that the supplementary lithium in the two active material layers Lithium materials are decomposed at different timings to achieve the purpose of secondary lithium supplementation, which not only increases the amount of lithium supplementation materials added, but also overcomes the lithium deposition at the negative electrode that is easily caused by excessive lithium supplementation materials in the prior art, while excessive lithium supplementation materials The problem of being less and unable to achieve the expected effect greatly prolongs the service life of the lithium-ion battery.

The invention discloses a method for synthesizing C-3 alkyl substituted quinoxalinone catalyzed by nickel under electrochemical conditions, and belongs to the technical field of compound preparation. In the method, 2-hydroxyquinoxaline and N-hydroxyphthalimide ester are used as raw materials in a single-chamber electrolytic cell, in an electrolyte, nickel chloride hexahydrate is used as a catalyst, and 4,4' -Di-tert-butyl-2,2'-dipyridine as ligand, electrolyzed under the condition of lithium perchlorate as supporting electrolyte, the reaction temperature is 60℃, and the current density is 8mA / cm 2 , the reaction 3h can obtain C-3 substituted alkylated quinoxalinone compounds with different structures. The method is mild in reaction, uses cheap and readily available nickel metal catalysts, and has good functional group compatibility. In addition, this electrochemical method provides a green and efficient method for the synthesis of various alkyl-substituted quinoxalinone compounds, which contributes to atom economy, greatly reduces the cost and makes the operation simpler. It is more conducive to the realization of industrialized production.

The invention relates to an electrochemical catalyzed synthesis method for an acyl substituted electron-deficient nitrogen-containing heterocyclic compound, and belongs to the technical field of acyls nitrogen-containing aromatic heterocyclic compounds. The method comprises the following steps: taking alpha-ketonic acid and an electron-deficient nitrogen-containing heterocyclic compound as raw materials in an electrolytic cell; taking halide ions as an electrocatalyst in electrolyte; carrying out electrolysis in the presence of additives, wherein the reaction temperature is 25-70 DEG C, and the current density is 1-5 mA / cm<2>; and consuming 2.0-3.5 F / mol of quantity of electric charge to obtain an acyls nitrogen-containing aromatic heterocyclic compound. According to the method, the acyls nitrogen-containing aromatic heterocyclic compound is synthesized by an electrochemical catalyzed indirect electrolyzing method which is simple to operate for the first time, use of expensive metal compounds such as silver nitrate and peroxide such as stoichiometric (NH4)2S2O8 is avoided, therefore, the atom economy can be realized, the cost is greatly reduced, operation is simplified, and the acyls nitrogen-containing aromatic heterocyclic compound is suitable for being produced industrially.

The invention relates to a synthetic method of a medium-ring lactam compound. The synthetic method comprises the following step that an amide compound with the structure shown in the formula (I) is electrolyzed to obtain the medium-ring lactam compound with the structure shown in the formula (II). The lactam compound can be directly electrolyzed through an electrochemical method, so that the medium-ring lactam compound can be obtained. Application of a transition metal catalyst and a stoichiometric oxidizing agent is avoided, generation of chemical waste is avoided, and the atom economy is facilitated. The method is simple to operate, the product purity is high, purification is easy, the efficiency and yield are high, and the production cost is low; besides, reaction conditions are mild, inert gas protection is not needed, a reaction system is greener, environmentally friendly, safe, economical, capable of saving energy and protecting the environment, and more beneficial to industrial production.