A kind of preparation method of cu/lif composite cathode material of lithium ion battery

A technology for composite cathode materials and lithium-ion batteries, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as complex processes, difficulty in adapting to large-scale production, and high equipment requirements, and achieve simple preparation processes and avoid corrosive electrodes. The use of strong and highly toxic hydrofluoric acid, the effect of low sintering temperature
CN108767236BActive Publication Date: 2021-01-08HUNAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUNAN UNIV OF SCI & TECH
Publication Date
2021-01-08

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Abstract

The invention discloses a preparation method of a lithium ion battery Cu / LiF composite cathode material. The method comprises the following steps: firstly, dissolving soluble copper salt and lithium salt in distilled water to be prepared into a solution I and dissolving soluble oxalate and NH4F in distilled water to be prepared into a solution II; then, adding the solution I into the solution II to perform precipitation reaction and separating a suspension to obtain solid separated matter; finally, sintering the obtained solid separated matter in an inert atmosphere furnace to obtain a Cu / LiFcomposite cathode material. Compared with the prior art, the preparation method disclosed by the invention has the advantages of simple preparation technology, low sintering temperature and the like;furthermore, a process is easy to control, and the purity of an obtained product is high; the defect of poor lithium of a CuF2 cathode material is solved, use of hydrofluoric acid with strong corrosion and poison is avoided, and the defects of complex equipment, high energy consumption and the like of a high energy ball milling method and a pulsed laser deposition method are overcome.
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Description

technical field

[0001] The invention relates to a positive electrode material of a lithium ion battery, in particular to a preparation method of a Cu / LiF composite positive electrode material. Background technique

[0002] Lithium-ion batteries with high energy density are one of the important technical directions for the development of new energy in the future. At present, the negative electrode materials of lithium-ion batteries have made great breakthroughs in silicon and alloy materials, and the reversible capacity is as high as 4200mAh·g. -1 . At present, commercialized lithium-ion batteries are mostly based on lithium deintercalation mechanism, generally using layered LiCoO 2 , spinel LiMn 2 o 4 and olivine LiFePO 4 Other lithium intercalation compounds are positive electrode materials. Since a 3d metal ion of these materials only exchanges one electron during the lithium deintercalation process, the theoretical mass specific capacity is low, such as LiCoO 2 , L...

Claims

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