3results about How to "Efficient manufacturing" patented technology

The present invention relates to a positive electrode active material in which the particle size of primary particles is uniform, so that the amount of fine powder is small, and the particles are rarely crushed in a fine crushing step and a rolling step for manufacturing a lithium secondary battery. The present invention relates to a positive electrode active material, a method for preparing the same, and a positive electrode and a lithium secondary battery comprising the same, in which the positive electrode active material comprises a lithium nickel cobalt manganese-based oxide having a nickel content of 50 mol% or more in all transition metals and being in the form of a single particle consisting of 10 or less primary particles, and a polydispersity index (PDI) value according to Equation 1 described in the specification is 1.0 to 1.8.

The present application relates to the technical field of moisture-permeable membrane materials, and provides a polysulfone moisture-permeable hollow fiber membrane, the average pore size of a first surface is not greater than 100 nm, and the average pore size of a second surface is not less than 0.25 μm; the content of sulfonic acid groups on the first surface is greater than the content of sulfonic acid groups on the second surface, and the difference between the content of sulfonic acid groups on the first surface and the content of sulfonic acid groups on the second surface is not less than 1X10 ‑3 -4; the water conversion efficiency of the hollow fiber membrane is 40% to 70%, and the water vapor permeation rate of the hollow fiber membrane is 0.5 to 3 g / min. The structure of the polysulfone moisture-permeable hollow fiber membrane provided by the present application shows high water conversion efficiency and water vapor permeation rate, and also has good tensile strength, so that it has a long service life.

This disclosure relates to composite wing panels and methods of manufacturing them. Wing panels having composite wing skin and longitudinal spars are produced on a moving production line. The wing panels are formed on a mandrel that moves along the production line through stations where a laminator lays the wing skin and a pick-and-place machine places longitudinal spars supplied by a longitudinal spars feeder onto the wing skin.