3results about How to "Large loading capacity" patented technology

The embodiment of the invention relates to a solar cell, a preparation method thereof and a photovoltaic module. The preparation method of the solar cell comprises the following steps: providing a semiconductor substrate; forming a tunneling layer on the surface of the semiconductor substrate; sequentially forming an undoped initial intrinsic material layer and a doping layer containing a dopant on the surface of the tunneling layer; the dopant comprises any one of an N-type dopant and a P-type dopant; and performing heat treatment on the initial intrinsic material layer and the doped layer, so that the dopant in the doped layer is diffused to the initial intrinsic material layer, and the initial intrinsic material layer is at least partially crystallized, so that the initial intrinsic material layer is converted into a doped passivation layer.

The application discloses a kind of wing-body fusion layout unmanned aerial vehicle's aerodynamic shape, it is related to low-altitude economic unmanned aerial vehicle high lift-drag ratio flight technical field, including wing-body part, the rear end of the upper surface of wing-body part is equipped with V-tail, engine is installed between the opposite surface of V-tail, the wing-body part with the V-tail is equipped with control surface part on;The lower surface of wing-body part is equipped with landing gear;The wing-body part includes inner wing and outer wing, the inner wing with the outer wing is symmetrically arranged, the edge of outer wing is equipped with wing tip;The leading edge sweep angle of wing-body part is 20 °, the trailing edge sweep angle of wing-body part is 17 °.The application discloses a kind of wing-body fusion layout unmanned aerial vehicle's aerodynamic shape, has better aerodynamic performance, stronger carrying capacity and lower noise;Appearance is simple, and cruise efficiency is high, suitable for engineering practical application.

The application relates to a sodium-ion battery positive electrode material, a manufacturing method thereof, a positive electrode sheet and a battery. The positive electrode material comprises a first component material and a second component material, the first component material is a polyanion material, the second component material is one or more of a polyanion material and / or a layer oxygen material, and the discharge platform voltage of the first component material is less than that of the second component material; the second component material is coated on the surface of the first component material, or the first component material is coated on the surface of the second component material, or the second component material and the first component material coexist in a graded manner. The application also provides a positive electrode sheet, which comprises a current collector and a first coating layer and a second coating layer arranged in sequence, the first coating layer comprises the first component material, and the second coating layer comprises the second component material. The application controls the voltage, particle size and ratio of the two component materials, so that the positive electrode material has both energy density and cycle stability.