Preparation method for nano-scale spinel nickel-doped lithium manganate material

Abstract

The invention discloses a preparation method for a nano-scale spinel nickel-doped lithium manganate material. The method comprises the following steps: accurately weighing lithium salt, manganese salt and nickel salt in a mole ratio of lithium ion to manganese ion to nickel ion of 1:1.92:0.08 in a molecular formula of LiNi0.08Mn1.82O4 and placing into a beaker; stirring and dissolving in a defined amount of distilled water at 50 DEG C and forming a uniform mixed solution, and then dropwise adding an oxidizing agent while stirring and keeping the temperature for 5-15min; heating under a constant temperature at 100 DEG C, evaporating a certain volume of water in the solution and then transferring into a porcelain crucible; placing the porcelain crucible filled with the solution into a temperature programming box type resistance furnace at 150 DEG C, keeping the temperature and heating for 5min, performing combustion reaction for 30-60 min under 400 DEG C air atmosphere, keeping the temperature at 500 DEG C for 1-2h, cooling and then grinding; secondarily roasting the ground powder at 600-700 DEG C, keeping the temperature for 3-6h and grinding again, thereby acquiring the final product. An anode material prepared according to the invention has excellent circulating stability.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material of a lithium ion battery, in particular to a nanoscale spinel-type nickel-doped lithium manganese oxide material and a preparation method thereof, which belong to the technical field of inorganic non-metallic functional materials. Background technique [0002] Lithium-ion batteries are widely used in electric vehicles, hybrid electric vehicles, and portable electronic devices due to their high energy, high power density, no memory effect, and good safety performance, thus dominating the energy supply market. [0003] Spinel-type lithium manganese oxide has a unique three-dimensional space structure for the rapid migration of lithium ions, and it has the advantages of low toxicity, low consumption, high safety, and environmental friendliness. It is most likely to replace commercial lithium cobalt oxide and become a new generation of relatively Promising cathode material. [...

AI Technical Summary

Problems solved by technology

[0015] The process steps of the above method are complicated, and the sintering temperature is too harsh, and the holding time is too long, which restricts the large-scale production of lithium manganate

Alternatively, although the method has simple process steps, the specific capacity, rate performance and cycle stability of the product cannot meet the needs of power batteries

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