A kind of preparation method of lithium manganate battery material

A lithium manganate battery and manganese source technology, applied in the direction of manganate/permanganate, etc., can solve the problems of incomplete precipitation of lithium salt, difficulty in industrial production, and production of by-products, etc., to achieve uniform particle size and excellent performance , to avoid the effect of reunion
CN102259931AInactive Publication Date: 2011-11-30姚金翰 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
姚金翰
Publication Date
2011-11-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preparing a lithium manganese oxide battery material, which comprises the following steps of: (1) dissolving a manganese source and a doped ion source into water, then adding an alkaline medium to form ion-doped manganese oxide precipitation, filling oxidizing gas into solution, finishing filling until a pH value of the solution reaches 6 to 7 and separating to obtain ion-doped manganese oxide; (2) mixing the ion-doped manganese oxide and aqueous solution of lithium hydroxide and performing a reaction under the hydrothermal condition of 150 to 500 DEG C to obtain the lithium manganese oxide; (3) pouring a mixture of a carbon source and water, a mixture of oxide and water or precursor salt solution of the oxide which is used for cladding into the obtained reaction solution, sufficiently stirring the obtained mixture, collecting the reaction solution and drying to obtain an intermediate product; and (4) in the protective atmosphere, sintering the intermediate product at a temperature of 500 to 800 DEG C to obtain a finished product. The lithium manganese oxide material prepared by the method has uniform particle size and the high and low temperature cycle performance and the high multiplying power discharge performance of the lithium manganese oxide material are both obviously superior to those of a like product synthetized by a conventional high-temperature solid-phase method.
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Description

(1) Technical field

[0001] The invention relates to the field of chemical power sources, in particular to a method for preparing a battery material, in particular to a method for preparing a lithium manganate battery material. (2) Background technology

[0002] Promoting the industrialization of electric vehicles has become an entry point for the structural adjustment and leap-forward development of China's auto industry. One of the key technologies of electric vehicles is to develop and manufacture power batteries that meet safety and environmental protection requirements, high capacity and long life. Due to its obvious advantages in specific energy, specific power and cycle performance, lithium-ion batteries have become the first choice for power batteries for electric vehicles. The positive electrode material of the battery not only affects the performance of the battery, but also is one of the main factors affecting the price of the power battery. Therefore, the develo...

Claims

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