Abstract: The present disclosure discloses a blended ternary positive-electrode material, a preparation method thereof and a lithium ion battery, and relates to the field of lithium battery technologies. A temperature-sensitive precursor type material is taken as a raw material, a large-particle precursor, a small-particle precursor and lithium sources are presintered to obtain a first presintered material and a second presintered material, presintered materials and binders are then mixed, compacted and punctured to obtain a first to-be-sintered material block and a second to-be-sintered material block, the first to-be-sintered material block and the second to-be-sintered material block are loaded into a sagger together for primary sintering, and using a periphery-center regional mode or an upper-lower-layer distribution mode, the first presintered material is distributed at a periphery or an upper layer, and the second presintered material is distributed at a center or a lower layer.

Abstract: Provided are low-residual-alkali high-nickel ternary positive-electrode material, preparation method and application thereof. The preparation method of a low-residual-alkali high-nickel ternary positive-electrode material includes: presintering a nickel-containing precursor and a lithium salt to obtain a presintered material, and performing primary high-temperature sintering on the presintered material and a dopant, wherein the presintering is controlled to be performed under a micro-negative pressure condition, such that water of the lithium salt and carbon dioxide generated by a primary reaction of the precursor and the lithium salt can be fully discharged.