35results about How to "Improve electrochemical reaction kinetics" patented technology

The invention belongs to the technical field of a lithium ion battery, and relates to a silicon carbon negative electrode material and a preparation method therefor, and the lithium ion battery. The preparation method for the silicon carbon negative electrode material comprises the following steps of (a), by taking silicon monoxide as the substrate material, performing heating treatment on siliconmonoxide to enable silicon monoxide to be subjected to a disproportionation reaction to generate c-SiO; (b), putting c-SiO into a chemical vapor deposition furnace, heating in protective atmosphere until a reaction temperature is reached, and pumping a carbon source to be subjected to a vapor deposition reaction to obtain c-SiO / C, wherein the carbon source is a liquid-state or solid-state compound; and (c), performing corrosion of the c-SiO / C by a corrosive liquid to obtain the silicon carbon negative electrode material c-SiO / Si / C. The preparation method is simple in process and easy to operate; and the prepared silicon carbon negative electrode material has the high lithium storage characteristic as the silicon type material and the high cycling stability as the carbon type material, aswell as high specific capacity, high conductivity and high cycling performance.

The invention belongs to the technical field of supercapacitor electrode material preparation, and discloses a photothermally enhanced supercapacitor electrode material and a preparation method. The copper foam is put into hydrochloric acid for ultrasonic treatment, and after taking it out, it is cleaned several times with deionized water, and then placed in acetone. Ultrasonic treatment in medium; ultrasonically treat the copper foam treated with acetone ultrasonic treatment with deionized water and alcohol respectively, take it out and dry it in vacuum to complete the pretreatment; put the pretreated copper foam into thiourea solution, carry out hydrothermal reaction, take out after cooling, wash and dry; soak the obtained product in ferric chloride solution, take it out, wash and dry, and then obtain the photothermally enhanced supercapacitor electrode material. The photothermally enhanced supercapacitor electrode material provided by the present invention has a three-dimensional multi-level nanosheet structure and has a large specific surface area, thereby exposing more chemical reaction active sites, achieving the effect of increasing the specific capacity, and has good flexibility and stability.

The invention relates to a lithium metal battery with a curved lithium sheet negative electrode. A cavity, a second cavity is provided between the diaphragm and the other end of the battery case, an electrode sheet is provided in the first cavity, and the electrode sheet abuts against one end of the battery case, a battery negative electrode is provided in the second cavity, and the battery The two ends of the negative electrode are respectively in contact with the diaphragm and the other end of the battery case. The negative electrode of the battery is made of a curved lithium sheet. Both the first cavity and the second cavity are filled with electrolyte, and the electrode sheet and the negative electrode of the battery are respectively soaked in the electrolyte. . The curved lithium sheet extends the area of ​​the SEI film of the negative electrode of the battery, effectively reducing the growth of dendrites, and the SEI film is not easy to break. It can always maintain the electrolyte infiltration, enhance the electrochemical reaction kinetics, increase the migration path of lithium ions, help maintain the battery capacity and cycle efficiency of lithium metal batteries, and prolong the service life.