3results about How to "Alleviate chalking problems" patented technology

This invention relates to the field of battery technology, and in particular to a lithium-ion battery anode, its preparation method, and a lithium-ion battery. The invention provides a method for preparing a lithium-ion battery anode, comprising the following steps: stacking a first composite layer and a second composite layer with the surface of an intermediate metal layer in contact with the surface of a lithium metal layer, and then pressing them to obtain a lithium-ion battery anode; wherein the first composite layer comprises a silicon-based anode layer and an intermediate metal layer; and the second composite layer comprises a lithium metal layer and a conductive substrate. The method for preparing the lithium-ion battery anode of this invention solves the problems of volume expansion of silicon anodes, dendrite growth of lithium metal anodes, and poor process safety when simply combining silicon anodes with lithium metal.

The invention discloses a low-expansion porous silicon carbon material and a preparation method thereof, and relates to the technical field of lithium ion batteries. According to the low-expansion porous silicon carbon material and the preparation method thereof, S1, porous carbon is selected, the specific surface area is 1500-2500m < 2 > / g, the particle size is 2-10mu m, and the aperture is 1-5nm; s2, feeding the porous carbon particles into a rotary kiln bed, vacuumizing a deposition area of a rotary kiln under protective gas, and introducing SiH4 for deposition to obtain a porous silicon carbon precursor; s3, FEC is selected as a coating precursor, the FEC and alkyl lithium oxide are subjected to water bath heating, the temperature is 45-80 DEG C, and the time is 2-4 h; s4, heating the purified vinylene carbonate to a melting state of 30 DEG C, adding an AIBN initiator, and heating to 50-80 DEG C for 5-10 hours to obtain poly (vinylene carbonate); and S5, uniformly mixing the obtained vinylene carbonate and the silicon carbon precursor, raising the temperature to the highest temperature, and keeping the temperature for 15-24 hours to obtain the porous silicon carbon coated with the vinylene carbonate.

The present invention relates to a preparation method of a high-nickel positive electrode material with a hollow structure and a high-nickel positive electrode material, belonging to the technical field of high-nickel positive electrode materials. A high-nickel positive electrode material precursor is prepared by a two-step coprecipitation method, the obtained high-nickel positive electrode material precursor is cleaned and dried, and the dried high-nickel positive electrode material precursor is mixed with LiOH·H2O and calcined to obtain a high-nickel positive electrode material. The present invention adopts a continuous two-step coprecipitation method and a specific calcination process, and controls the growth process and arrangement mode of the precursor by regulating the reaction conditions and doping elements to ensure the formation of a hollow structure and the uniform distribution of doping elements. It can be seen that the present invention can more accurately control the particle morphology, reduce the formation of microcracks, and thus improve the cycle stability of the high-nickel positive electrode material.