Modified nickel-cobalt lithium aluminate positive electrode material and preparation method thereof

A technology of lithium nickel cobalt aluminate and positive electrode materials, which is applied to battery electrodes, electrical components, electrochemical generators, etc., can solve the problems of poor electrical properties of products, poor uniformity of electrical properties of products, and numerous processes, etc., and achieve reduction The degree of mixing and the effect of improving electrochemical performance
CN103972499AActive Publication Date: 2014-08-06ZHEJIANG MEIDARUI NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
ZHEJIANG MEIDARUI NEW MATERIAL TECH CO LTD
Publication Date
2014-08-06

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Abstract

The invention relates to a modified nickel-cobalt lithium aluminate positive electrode material and a preparation method of the material. The chemical general formula of the material is LiNi(1-a-b)CoaAlbO2 / TiO2, wherein a is greater than 0.1 and less than 0.3; b is greater than 0.01 and less than 0.2; 1-a-b is greater than 0 and less than 1; the TiO2 layer is a coating layer; the preparation method of the material comprises the following steps: preparing soluble metal nickel salt, cobalt salt and aluminium salt into a mixed salt solution, preparing the mixed salt solution, NaOH and ammonia water into a mixed alkali solution for reacting, filtering, washing, drying and then roasting the mixed alkali solution for 5-10 hours at the temperature of 400-600 DEG C in the oxygen atmosphere, then carrying out ball milling and uniformly mixing with lithium salt, roasting the mixed alkali solution for 6-16 hours at the high temperature of 800-1000 DEG C in the oxygen atmosphere, coating the mixed alkali solution by titanium dioxide to prepare the modified nickel-cobalt lithium aluminate positive electrode material. The prepared modified ternary positive electrode material of the lithium ion battery is good in electrochemical performance; the dry coating process is free of waste liquid and high-temperature sintering, so that the energy consumption and the cost are reduced.
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Description

technical field

[0001] The invention relates to the technical field of lithium ion battery cathode materials, in particular to a modified nickel-cobalt lithium aluminate cathode material and a preparation method thereof. Background technique

[0002] Compared with other traditional secondary batteries, the new green high-energy lithium-ion battery has many advantages such as good voltage platform, good cycle performance, large specific capacity and high energy density, so it is widely used in 3C electronic products. The cathode material is an important part of lithium-ion batteries, and it is also a bottleneck restricting the development of lithium-ion batteries. It determines the performance, cost and development of lithium-ion batteries. Therefore, the development of high-performance cathode materials is imminent.

[0003] In recent years, nickel-cobalt-lithium manganese oxide ternary materials have developed rapidly. Due to the synergistic effect of nickel-cobalt-manganes...

Claims

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