A method for preparing lithium battery cathode material based on in-situ composite and recombination
A technology for positive electrode materials and lithium batteries, applied in the direction of lithium batteries, battery electrodes, positive electrodes, etc., to achieve stable material structure, avoid pole piece preparation process, and good crystallization performance
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Embodiment 1
[0030] A method for preparing a lithium battery positive electrode material based on in-situ compounding and recombination, comprising the following steps:
[0031] (1) Mn-Co-Ni ternary composite lithium-rich manganese-based cathode material was prepared by co-precipitation method, and the selected raw material was MnSO 4 , CoSO 4 , NiSO 4 , the MnSO 4 , CoSO 4 and NiSO 4 The molar ratio is 4.2:1:1; then constant temperature stirring for 4 hours in an oil bath at 80 °C forms such as figure 2 The pink precipitate shown in (a); the washed and dried precursor was sintered at 850 °C for 24 hours in an air atmosphere, and finally a pure-phase LMR material was obtained. The microstructure of the sintered product is as follows figure 2 (b);
[0032] (2) Combine the pure phase LMR obtained in step (1) with LiMnO 2 , Li 2S and Super-P are mixed by high-energy liquid phase ball milling, acetone is selected as the medium, and the ball is milled for 24 hours under the condition ...
Embodiment 2
[0040] A method for preparing a lithium battery positive electrode material based on in-situ compounding and recombination, comprising the following steps:
[0041] (1) Mn-Co binary composite lithium-rich manganese-based cathode material was prepared by hydrothermal method, and the selected raw material was MnSO 4 , CoSO 4 , the MnSO 4 , CoSO 4 The molar ratio of the reaction vessel is 4:1, and the reaction solution is prepared by stirring at room temperature until it is completely dissolved; then the reaction solution is transferred to a 100ml reactor liner, and it is placed in a 150°C oven for 24 hours at a constant temperature , a pink precipitate was obtained; the washed and dried precursor was first sintered at 400 °C for 4 hours in an air atmosphere, and then heated to 800 °C for 20 hours, and finally a pure-phase LMR material was obtained;
[0042] (2) the pure phase LMR, MnO obtained in step (1) 2 , MnCl 2 , Carbon black were pressed to make sputtering targets;
...
Embodiment 3
[0045] A method for preparing a lithium battery positive electrode material based on in-situ compounding and recombination, comprising the following steps:
[0046] (1) Mn-Ti binary composite lithium-rich manganese-based cathode material was prepared by co-precipitation method, and the selected raw material was MnSO 4 , Ti(SO4) 2 ·9H 2 O, the MnSO 4 , Ti(SO4) 2 ·9H 2 The molar ratio of O was 5:2; then the mixture was stirred at a constant temperature in an oil bath at 70°C for 3 hours; the washed and dried precursor was sintered at 850°C for 24 hours in an air atmosphere, and finally a pure-phase LMR material was obtained;
[0047] (2) combining the pure phase LMR obtained in step (1) with MnO 2 , Li 2 S. The asphalt is mixed by high-energy liquid phase ball milling, and acetone is selected as the medium, and the ball is milled for 20 hours under the condition of 700 r / min.
[0048] (3) Pressing the primary target obtained in step (2) into a sputtering target, fixing th...
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