Boron-doped and phosphite-coated nickel-based positive electrode material for lithium ion all-solid-state battery and preparation method of boron-doped and phosphite-coated nickel-based positive electrode material
A technology of all-solid-state batteries and lithium-ion batteries, which is applied in phosphorous acid, battery electrodes, positive electrodes, etc., can solve the problems of low electronic conductance without too much attention, and achieve good lithium ion conductivity and good application Effect
Active Publication Date: 2020-12-04
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Abstract
The invention discloses a boron-doped and phosphite-coated nickel-based positive electrode material for a lithium ion all-solid-state battery and a preparation method of the boron-doped and phosphite-coated nickel-based positive electrode material. By utilizing the characteristics of low melting point and high boiling point of a boron compound, the uniform distribution of coating elements on the surface of a high-nickel positive electrode material is promoted to form a continuous and complete coating layer, namely a lithium ion conductor phosphite layer (LLP), and meanwhile, boron is diffusedat high temperature to enter the bulk phase of the material to be doped to play a role in stabilizing the structure of the material. According to the boron-doped and phosphite-coated nickel-based positive electrode material, the phosphite coating layer formed on the surface of the positive electrode material can effectively improve the interface compatibility between the high-nickel positive electrode material and the sulfur compound solid electrolyte, so that the rapid increase of the interface impedance between the high-nickel positive electrode material and the sulfur compound solid electrolyte due to the space charge layer effect is avoided; and the application of the high-nickel positive electrode in the lithium ion sulfur-based electrolyte all-solid-state battery is promoted.
Application Domain
Secondary cellsPositive electrodes +2
Technology Topic
Lithium ion conductorsInterface impedance +11
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