43results about How to "Improve voltage hysteresis" patented technology

The invention relates to a surface finish method of a carbon fluoride material. The method comprises the following steps: (1) mixing nanometer copper and carbon fluoride, then adding a solvent for ball milling so as to form a combined pulp; (2) drying the mixed pulp so as to form a mixture; (3) screening the mixture so as to obtain the powder mixture; (4) putting the powder mixture into an atmosphere oven so as to be calcined; (5) taking out the calcined powder mixture, lowering the temperature of the calcined powder mixture to the room temperature, and then screening the calcined powder mixture of which the temperature is lowered so as to form the carbon fluoride material modifies by the nanometer copper. According to the invention, the carbon fluoride and the nanometer copper with good conductivity are mixed, and after the mixture is calcined at a high temperature in an inert atmosphere, the nanometer copper reacts on the surface of the carbon fluoride, so that the phenomenon that the voltage of carbon fluoride is delayed is obviously improved, and high-ratio discharge and low temperature performance are greatly improved. The carbon fluoride with a finished surface, prepared by the method, is used as a positive material to be made into a lithium-carbon fluoride battery system, wherein the lithium-carbon fluoride battery system has the properties of high-ratio discharge and low temperature high-current discharge, so that the application range of the lithium-carbon fluoride battery system is extended.

The present invention is lithium cell with foamed nickel material as current collector and its making process. This kind of lithium cell is obtained through the process including ultrasonic wave treatment, coating, and rolling or negative pressure adsorption to fill active matter, copper powder, PTFE emulsion, distilled water and alcohol into foamed nickel electrode. The lithium cell making process includes main steps of compounding material, filling, drying, pressurizing, etc. The present invention has obviously lowered electrochemical polarization of lithium cell, improved electron conducting path of electrode, improved heavy load work capacity, low temperature performance, lagging characteristic, etc of cell, and raised safety performance.

The invention discloses a lithium / thionyl chloride battery electrolyte which comprises thionyl chloride, electrolyte salt and additives, the additives comprise a first additive and a second additive,and the preparation method comprises the following steps: distilling thionyl chloride, collecting fractions, weighing electrolyte salt, dissolving the electrolyte salt in the thionyl chloride fraction, purifying the first additive, purifying the second additive, weighing the purified first additive and the purified second additive, and adding the first additive and the second additive into the thionyl chloride solution of the electrolyte salt to obtain the lithium thionyl chloride battery electrolyte. The first additive and the second additive in the lithium thionyl chloride battery electrolyte have a synergistic effect, so that the lithium / thionyl chloride battery obtains good discharge voltage and discharge capacity, and the voltage lag phenomenon of the lithium / thionyl chloride batteryis remarkably improved, and the lithium thionyl chloride battery prepared from the electrolyte has relatively good cycle performance and relatively high safety.