33results about How to "Guaranteed covering effect" patented technology

The invention discloses a preparation method of a single-crystal-morphology lithium ion battery positive electrode material. The preparation method comprises the following steps: (1) adding a metal salt solution and a sodium hydroxide solution into a reaction kettle, and carrying out a co-precipitation reaction to prepare precursor slurry; (2) mixing a precursor slurry with a lithium source and a doping agent by a wet method, and performing spray drying to obtain a precursor mixture; (3) performing primary sintering on the precursor mixture to obtain a primary sintering product; and (4) washing the primary sintering product with water, mixing the washed product with a coating agent, and carrying out secondary sintering to obtain the single-crystal-morphology lithium ion battery positive electrode material. In the preparation method, the precursor slurry is prepared by adopting an ammonia-free process, particles formed by stacking a plurality of fine particles are formed, the specific surface area of the precursor is very large and is greater than 100m < 2 >/g, and the precursor with an ultrahigh specific surface area is easier to form a single-crystal positive electrode material with uniformly dispersed primary particles after being sintered, so that development of the capacity is facilitated.

The invention discloses a ditching type seedling planting device used in a vegetable dry land transplanting machine. A duckbilled seedling planting device is prone to soil adhesion in clayed soil. The ditching type seedling planting device used in the vegetable dry land transplanting machine comprises a rack mechanism, a planting mechanism and a soil covering wheel mechanism; the planting mechanism comprises a ditcher, a tension spring, a cam, a sliding block component, a push rod combined body, rotating cup doors, a fixed cup door and a sliding groove rod; a bearing roller hinged to the front end of the push rod combined body and the cam form a cam pair; the push rod combined body and the cam are connected through the tension spring; the fixed cup door is fixed to the rear end of the push rod combined body; the middle portion of the sliding block component is fixed to the push rod combined body, and each of the two ends of the sliding block component and a corresponding linear guide rail form a movement pair; the tops of the inner sides of the two rotating cup doors are hinged to the two sides of the fixed cup door; the sliding groove rod fixed to the rotating cup doors and a groove pin form a cylindrical pair; and the groove pin is fixed to the bottom of a groove pin fixing plate which is fixed to a reference supporting block. The ditching type seedling planting device used in the vegetable dry land transplanting machine avoids damage to pot seedlings in the seedling pushing process and is compact in structure.

The invention provides a preparation method of a metaphosphate-containing lithium ion battery positive electrode material. The preparation method of the metaphosphate-containing lithium ion battery positive electrode material comprises the following steps: mixing a lithium-containing oxide with dihydric phosphate, and calcining in an oxidizing atmosphere to obtain the lithium ion battery positiveelectrode material, wherein the general formula of the lithium-containing oxide is Li Ni Co < c > Mn < d > X < 1-b-c-d > O < 2 >, and X comprises one or more of Al, Mg and Zr. The preparation method of the metaphosphate-containing lithium ion battery positive electrode material provided by the invention is good in coating effect, few in coating impurities and simple in preparation method, and the lithium ion battery prepared from the metaphosphate-containing lithium ion battery positive electrode material is good in cycle performance and safety.