Mixed positive electrode material and preparation method thereof
A positive electrode material and manufacturing method technology, applied in battery electrodes, electrical components, circuits, etc., can solve the problems of poor cycle performance, poor conductivity, poor thermal stability, etc., to extend the service life, reduce the internal resistance of the battery, and improve the cycle life. Effect
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Embodiment 1
[0019] Embodiment 1: hybrid positive electrode material, including active material is 76%, conductive agent 10%, oxide 6%, binding agent 8%; Described active material comprises lithium cobaltate and lithium iron phosphate, lithium cobaltate and The stoichiometric ratio of lithium iron phosphate is 5:8.
[0020] The composition raw material of described conducting agent is graphene 65g, activated carbon 32g, monoethanolamine 3g, polyvinylpyrrolidone 5g, xanthan gum 8g and styrene 35g; Production method is as follows: first xanthan gum and styrene are mixed, place Mix evenly at a temperature of 40-45°C to obtain an organic carrier; then add other remaining constituent materials to it, heat to 50-55°C, adjust the ph to neutral, and stir mechanically; then grind on a three-roll mill Mix and grind the slurry to a particle size of 15 microns to obtain the finished product.
[0021] The oxide is a mixture of manganese oxide, ruthenium dioxide, and gallium trioxide, and the mixing ra...
Embodiment 2
[0028] Example 2: In this example, the stoichiometric ratio of lithium cobaltate and lithium iron phosphate is 1:9 as the positive electrode active material, and the other contents are the same as in Example 1.
Embodiment 3
[0029] Example 3: In this example, the stoichiometric ratio of lithium cobaltate and lithium iron phosphate is 11:2 as the positive electrode active material, and the other contents are the same as in Example 1.
[0030] After testing, this embodiment 1 is compared with the traditional battery:
[0031] When the working voltage is high (2.75V~4.2V), the electrical conductivity and high-temperature storage performance of the positive electrode material of the present invention are better than those of traditional batteries; It breaks the characteristics of traditional batteries, especially in terms of overcharge resistance.
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