7results about How to "Reduce complexation" patented technology

In order to solve the problems of acidity increase and lithium salt consumption in the cycle process of an existing lithium ion battery, the invention provides a non-aqueous electrolyte and a lithium ion battery, the non-aqueous electrolyte comprises a non-aqueous organic solvent, a first lithium salt, a second lithium salt and a first additive, the first lithium salt is lithium hexafluorophosphate, and the second lithium salt is lithium hexafluorophosphate. The second lithium salt comprises at least one of lithium bis (fluorosulfonyl) imide and lithium bis (trifluoromethylsulfonyl) imide, the first additive comprises a compound shown in a structural formula 1: # imgabs0, and the non-aqueous electrolyte meets the following conditions: 45 < = sigma * (b + c) < = 220, 0.01 < = a / c < = 0.8, 0.001 < = a < = 1, 2 < = b < = 19, 1 < = c < = 10, and 6 < = sigma < = 13. The non-aqueous electrolyte provided by the invention can keep a low-acidity state after long-term circulation, and can effectively prolong the cycle life of a lithium ion battery when being applied to the lithium ion battery.

This invention discloses an acid-triggered hydrogel plugging agent and its preparation method, comprising polyacrylamide, carboxylated tannic acid, and slow-release iron, wherein the mass ratio of polyacrylamide, carboxylated tannic acid, and slow-release iron is 10:0.03-0.06:0.005-0.01. This invention solves the problems of existing gel plugging agents being unable to remain stable in acidic environments for extended periods and being difficult to inject.

The invention relates to the technical field of wastewater treatment, in particular to a heavy metal capturing agent and a preparation method and application thereof. The heavy metal capturing agent provided by the invention comprises a compound with a structure as shown in a formula (I) and ferrous sulfide, and in the formula (I), R1 is C1-C6 alkylene. The heavy metal capturing agent is formed by using a compound of double-active sulfur atoms and acrylamide groups with strong chelating property and ferrous sulfide, heavy metals are chelated by using the double-active sulfur atoms, and the chelated heavy metals are flocculated by using good flocculability of the acrylamide groups; meanwhile, ferrous sulfide is oxidized in water to form ferric hydroxide with a coagulation effect, heavy metal is further flocculated and settled, the settling rate and removal efficiency of the heavy metal are improved, meanwhile, hydroxyl free radicals generated by the ferrous sulfide can degrade organic complexing ligands, the complexing property of wastewater is reduced, and the heavy metal removal efficiency is improved. The complexing agent is prevented from being continuously complexed with subsequent heavy metal.

This invention discloses a pH-responsive slow-release calcium fertilizer compatible with potassium dihydrogen phosphate and its preparation method, belonging to the field of agricultural fertilizer technology. Each liter of the slow-release calcium fertilizer comprises the following components: 1000-1200 g of calcium nitrate tetrahydrate; 50-100 g of small peptide amino acid solution, wherein the free amino acid content in the small peptide amino acid solution is not less than 100 g / kg, and the small peptide amino acid content is not less than 330 g / kg; 60-100 g of erythritol; 3-10 g of sodium alginate; 10-50 g of citric acid; 10-40 g of mannitol; appropriate amount of triethanolamine for adjusting the pH value to 4.5-5.8; and water to a final volume of 1 L. This invention also provides a method for preparing the calcium fertilizer. This calcium fertilizer, through a unique synergistic stabilizing system of erythritol-small peptide-weak acid, not only can be mixed with potassium dihydrogen phosphate without precipitation, solving the problem of calcium-phosphorus antagonism, but also possesses pH-responsive release characteristics, intelligently releasing calcium ions in the acidic environment of plant rhizosphere, significantly improving calcium absorption and utilization.

The invention provides an amorphous carbon material modified by an artificial SEI membrane as well as a preparation method and application of the amorphous carbon material, and belongs to the field of electrode material interface modification methods and material preparation. The preparation method of the amorphous carbon material modified by the artificial SEI membrane comprises the following steps: adding amorphous carbon into a nitric acid solution for heat treatment to obtain heat-treated amorphous carbon; mixing the heat-treated amorphous carbon with water to obtain a turbid liquid, and then adding a polymeric monomer and an alkali metal compound into the turbid liquid for dispersion treatment to obtain a dispersion system; and raising the temperature of the dispersion system, and then carrying out heat preservation treatment, so that the polymeric monomers are subjected to polymerization reaction to obtain the artificial SEI membrane modified amorphous carbon material. After the artificial SEI film is adopted for pre-modification, the sodium ion conducting capacity of the amorphous carbon material is improved, so that the capacity, the first coulombic efficiency and the rate capability of the sodium ion battery are improved.

This application relates to the field of batteries, providing a battery cell and its preparation method, a battery device, an electrical device, and an energy storage device. The preparation method of the battery cell includes: providing a cell assembly, wherein the cell assembly is formed by stacking or winding a positive electrode sheet, a separator, and a negative electrode sheet; providing a housing, and placing the cell assembly inside the housing; providing an electrolyte and injecting the electrolyte into the housing; and performing a formation step; wherein the negative electrode sheet includes a current collector, a negative electrode active material, a conductive agent, and a binder, and the binder includes a functional polymer, wherein the functional polymer is formed by chemically bonding a first reaction unit, a second reaction unit, and a third reaction unit to form a molecular network structure. This application can significantly improve the cycle life of the negative electrode, significantly improve the cycle stability and structural integrity of the silicon negative electrode, and provide effective technical support for the practical application of high-capacity lithium-ion batteries.

A functional fiber diaphragm, a preparation method thereof and an application thereof in a polymer solid-state lithium battery, which relates to a fiber diaphragm and a preparation method and application thereof. It aims to solve the problems of poor rate performance, low capacity and short cycle life of polymer solid-state lithium batteries. The functional fiber diaphragm is formed by electrostatic spinning and thermal micro-crosslinking of a polymer / inorganic salt mixed solution dispersed with electronic conductor nanorod fillers. Preparation method: electrostatic spinning and calcining a mixed solution of metal salt and polymer powder to obtain an electronic conductor nanorod powder; then electrostatic spinning and thermal micro-crosslinking of the mixed solution with a polymer and an inorganic salt to obtain a functional fiber diaphragm; applying a polymer electrolyte precursor liquid on the fiber diaphragm and then polymerizing and curing to obtain a solid polymer electrolyte; assembling a positive electrode, a functional fiber diaphragm and a negative electrode into a solid-state lithium battery, the capacity retention rate of the battery after 800 cycles at room temperature is 76.1% to 82.3%, and can be used in the field of lithium batteries.