30results about How to "Reduce the difficulty of coating" patented technology

The invention relates to the field of a semiconductor laser, in particular to a wavelength beam combining mirror device realizing Brewster angle incidence, which comprises a first laser, a first collimation system, a wavelength beam combining mirror, a second collimation system and a second laser, wherein one surface of a wavelength beam combining mirror is a film coating surface, the other side of the wavelength beam combining mirror is not the film coating surface, the non-film-coating surfaces of the first laser, the first collimation system and the wavelength beam combining mirror are positioned at the same side, the film coating surfaces of the second laser, the second collimation system and the wavelength beam combining mirror are positioned at the same side, an included angle theta B1 between the optical axis of the first collimation system and the normal line of the wavelength beam combining mirror is the same as the included angle theta B2 between the optical axis of the second collimation system and the normal line of the wavelength beam combining mirror. The wavelength beam combining mirror device has the advantages that the film coating difficulty is low, the film layer number is small, the corresponding stress is small, the transmission light realizes the Brewster angle incidence, the plating of any film is not needed at the incidence side, in addition, the transmission rate is theoretically 100 percent when the P light realize the Brewster angle incidence, the processing cost is reduced, and simultaneously, the beam combining efficiency is improved.

A fast-charging positive electrode sheet with high specific energy and its preparation method and application, which includes a current collector, a first active material layer and a second active material layer; the first active material layer is coated on the current collector, and the first active material layer is coated on the current collector. Two active material layers are coated on the surface of the first active material layer; the first active material layer includes the first active material and a first binder selected from oily binders, and the second active material layer includes the first active material layer Two active materials and a second binder selected from aqueous binders; wherein the aqueous binder includes water-soluble lithium cellulose and / or lithium polyacrylate; the second active material includes lithium iron phosphate. Furthermore, the first active material layer contains more conductive agents, which can directly function as a carbon-coated current collector, reduce the cost of the manufacturing process, and simultaneously improve the dynamic performance of the oily slurry. Lithium iron phosphate with good rate performance is used in the second active material layer, which can significantly improve the energy density and rate performance of the battery.