Lithium ion battery cathode material and preparation method thereof
A technology for lithium-ion batteries and positive electrode materials, applied in the field of lithium-ion battery positive electrode materials and its preparation, can solve problems such as poor conductivity, particle aggregation, lithium-nickel mixed discharge, etc., and achieve simple and easy preparation methods, excellent rate performance, and improved The effect of conductivity
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[0028] see figure 1 and figure 2 , the preparation method of lithium ion battery cathode material provided by the invention mainly comprises the following steps:
[0029] Step 1, with the ternary precursor Ni x co y mn 1-x-y (OH) 2 and lithium salt as raw materials for mixing and roasting to obtain the ternary cathode material LiNi x co y mn 1-x-y o 2 .
[0030] Specifically, the ternary precursor Ni x co y mn 1-x-y (OH) 2 It is mixed with lithium salt according to a predetermined molar ratio, then ball milled, and then calcined under a predetermined atmosphere to obtain the ternary cathode material LiNi x co y mn 1-x-y o 2 . Among them, 0.5≤x≤0.8, 0.1≤y≤0.2.
[0031] More specifically, the Ni x co y mn 1-x-y (OH) 2and lithium salt according to the molar ratio of 1:1.5~1:1 into the ball mill for 0.5h~2h. Sintering at ~900°C for 10h~20h to obtain the ternary cathode material LiNi x co y mn 1-x-y o 2 .
[0032] In this embodiment, the lithium salt ma...
Embodiment 1
[0041] The preparation method of the lithium-ion battery cathode material provided by Example 1 of the present invention mainly includes the following steps:
[0042] S1, the Ni 6 co 2 mn 2 (OH) 2 Add lithium salt and lithium salt into the ball mill at a molar ratio of 1:1, the ball milling time is 1h, and the ball mill speed is 300r / min. After the ball milling is completed, the obtained product is put into a muffle furnace and sintered at 900°C for 10h to obtain a ternary positive electrode Material;
[0043] S2, configure the concentration of zinc nitrate and cobalt nitrate to be 50ml of methanol solution of 0.05mol / L and 0.01mol / L respectively, and pour 50ml of methanol solution of dimethylimidazole with a concentration of 0.2mol / L to obtain the mixed After standing for 24 hours, the bimetallic ZIF (BMZIF) containing metal cobalt and zinc was obtained by centrifugation, washing and drying.
[0044] In S3, the obtained ternary cathode material and the obtained BMZIF pow...
Embodiment 2
[0046] The preparation method of the lithium-ion battery positive electrode material provided by Example 2 of the present invention mainly includes the following steps:
[0047] S1, the Ni 6 co 2 mn 2 (OH) 2 Add lithium salt and lithium salt into the ball mill at a molar ratio of 1:1.3, the ball milling time is 1h, the ball mill speed is 300r / min, after the ball milling is completed, the obtained product is put into a muffle furnace and sintered at 800°C for 15h to obtain a ternary positive electrode Material;
[0048] S2, configure the concentration of zinc nitrate and cobalt nitrate to be 25ml of methanol solution of 0.04mol / L and 0.04mol / L respectively, and pour 50ml of methanol solution of dimethylimidazole with a concentration of 0.2mol / L to obtain the mixed After standing for 24 hours, the bimetallic ZIF (BMZIF) containing metal cobalt and zinc was obtained by centrifugation, washing and drying.
[0049] In S3, the obtained ternary cathode material and the obtained ...
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