Preparation method of morphology-different lithium ion battery high-voltage cathode material

Abstract

The invention discloses a preparation method of a morphology-different lithium ion battery high-voltage cathode material. The preparation method of the morphology-different lithium ion battery high-voltage cathode material comprises the following steps of (1) dissolving a manganese source, a nickel source and a cobalt source in water to prepare a solution A, dissolving precipitator and dispersantin water to prepare a solution B, and dissolving carbon in water to prepare a mother liquor; (2) adding the solution A and the solution B into the mother liquor in a dropwise and mixed mode for precipitation reaction, regulating the pH of the reaction system through ammonium bicarbonate, and after the reaction is completed, washing and drying reaction products to obtain a precursor; (3) mixing theprecursor with lithium salt and performing calcining and annealing treatment to obtain the high-voltage cathode material with a molecular formula of LiNi0.4Co0.1Mn1.5O4. The discharge voltage platform of the morphology-different lithium ion battery high-voltage cathode material is 4.95-5.15 V; by introducing the element of cobalt, the structural stability of spinel type lithium battery cathode materials can be effectively improved, so that the spinel type lithium battery cathode materials can greatly improve the circulating performance and the rate capability and further achieve high application and promotion values.

Description

technical field [0001] The invention belongs to the field of lithium-ion battery materials, in particular to LiNi, a high-voltage cathode material for lithium-ion batteries with different shapes 0.4 co 0.1 mn 1.5 o 4 method of preparation. Background technique [0002] At present, with the ever-changing information technology innovation and the enhancement of people's awareness of environmental protection, the prospect of chemical batteries is facing great challenges. First of all, with the rapid development and maturity of electronic technology in the past two decades, people have continuously put forward new requirements for light-weight, high-energy, and adaptable power sources, and lithium batteries have gradually become an ideal high-performance energy source to meet this demand. Batteries offer the best option in terms of capacity performance and safety. Secondly, with the increasing environmental pollution, the continuous consumption of non-renewable energy such ...

AI Technical Summary

Problems solved by technology

In recent years, the spinel cathode material (LiMn 2 o 4 ) compared to the current commercial LiCoO 2 , Layered ternary materials have obvious advantages, and the spinel lithium manganese oxide LiMn developed on the basis of it 2 o 4 , lithium nickel manganese oxide LiNi 0.5 mn 1.5 o 4 It has a working voltage platform of 4.4 ~ 4.7V, but the material also has shortcomings, such as low capacity retention rate, cycle performance needs to be improved, etc.

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