3results about How to "Increase volume capacity" patented technology

The application discloses a low-reversibility lithium iron phosphate precursor prepared by a reaction type emulsion method and a preparation method and application thereof. The lithium iron phosphate precursor material meets the following two conditions: ①2.44-2.86 g / cm 3 , and ②0.4<=<=2.5, wherein C is an average circularity, the circularity=(4*π*A) / G 2 ; wherein ρ is the density of the lithium iron phosphate precursor material measured by a gas displacement method, K 90 =(Dv90-Dv10) / Dv50, A is the projected area of a particle sample of the lithium iron phosphate precursor material, and G is the projected perimeter of the particle sample of the lithium iron phosphate precursor material. The lithium iron phosphate precursor material has a high tap density and good processing performance, the lithium iron phosphate prepared by a carbon reduction method from the lithium iron phosphate precursor material has a high tap density, thereby having a high volume specific capacity, and the prepared battery has a high energy density.

This invention discloses a perforated chip capacitor and its manufacturing method. The capacitor uses an integral aluminum plate with multiple through holes forming a perforated structure, and at least some of the through holes penetrate the aluminum plate. An oxide layer is formed on the entire surface of the aluminum plate, including the inner surface of the through holes. The manufacturing method includes: welding an anode lead plate to the aluminum plate; laser drilling the aluminum plate to form through holes; acid etching to increase the specific surface area; anodizing to form an oxide layer; and sequentially forming a polymer layer, a graphite layer, and a silver paste layer. This invention, through its integrated porous aluminum plate structure, replaces the traditional multi-layer laminated structure, effectively improving the problems of high leakage current, poor heat dissipation, and insufficient vibration resistance of multilayer capacitors. It also achieves high specific capacitance and low ESR, significantly improving the overall performance and reliability of the capacitor.

The application relates to a phosphorus-sulfur co-doped hard carbon material, a preparation method and a sodium ion battery, and belongs to the technical field of secondary batteries. In the material, the carbon layer crystal face parameter satisfies d 002 = 0.36-0.39 nm, L c = 1.20-1.40 nm, L a = 6.00-6.40 nm; the phosphorus and sulfur doped heteroatoms are in a locally enriched and overall uniform distribution mode; in the material, the content of phosphorus is 0.367%-0.457%, and the content of sulfur is 0.949%-1.183%. A three-step special process of "solvent low-speed dilution-winding reinforcement crosslinking-gradual temperature increase directional carbonization" is adopted, and the heteroatom doping and the construction of the dense carbon skeleton are realized by relying on the winding characteristics of the high-viscosity precursor molecules. The material has excellent electrochemical performance, specifically good cycle stability, high volume specific capacity and excellent rate performance.