Method for preparing laminated Li-Ni-Mn-O compoiste material and its application
A composite material, lithium-nickel-manganese-oxygen technology, is applied in the preparation of layered lithium-nickel-manganese-oxygen composite materials, and the application of layered lithium-nickel-manganese-oxygen composite materials in lithium-ion batteries can solve the problem that product performance indicators are difficult to control, The problems of uneven product composition and complex preparation process can achieve the effect of excellent cycle performance, excellent cycle performance and high reaction yield.
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Embodiment 1
[0026] Weigh 291 grams and 400 grams of analytically pure nickel nitrate and manganese nitrate respectively, dissolve them in distilled water, make a 2mol / L mixed solution, and place them in a reaction pot. Then 100 grams of analytically pure sodium hydroxide was made into a 4mol / L solution. Mix sodium hydroxide and ammonia water in a ratio of 2:1. While heating and stirring the nickel-manganese mixed solution, slowly add the prepared mixed solution of sodium hydroxide and ammonia water, control the pH in the reaction pot to 12, and continue stirring until the reaction is complete. Then, the precipitate was filtered and dried in an oven at 150° C. for 5 hours to obtain a nickel-manganese composite precursor. 50 grams of this precursor and 20 grams of lithium carbonate were mixed and ground, and then placed in a box furnace at 650 ° C for 5 hours. After natural cooling, ball mill in a ball mill for 2 hours, and then place it in a box furnace for sintering at 900°C for 10 hour...
Embodiment 2
[0028] The lithium carbonate in the embodiment 1 is replaced with lithium hydroxide, and other process conditions and tests are consistent with the embodiment 1. The test results are shown in Table 1.
Embodiment 3
[0030] In the second stage of sintering, 950°C was used instead of 900°C in Example 1, and the synthesis time was 8 hours. Other process conditions were consistent with Example 1. The test results are shown in Table 1.
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