Porous nickel cobalt lithium manganate ternary positive electrode material and preparation method thereof
A cathode material, lithium cobalt manganate technology, applied in the field of ternary cathode materials and their preparation, can solve the problems of poor cycle stability, side reactions, capacity loss, etc., and achieve excellent rate performance, simple synthesis process, and excellent cycle performance. Effect
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Embodiment 1
[0043] The porous nickel-cobalt lithium manganese oxide ternary positive electrode material LiNi 0.5 co 0.2 mn 0.3 o 2 Mainly made by:
[0044] (1) Add 0.1764 g of polyether F127 into 50 mL of a mixed solution of water and ethylene glycol (volume ratio 1:1), stir and dissolve for 3 h at room temperature with a stirring speed of 400 r / min to obtain 50 mL of template organic solution;
[0045] (2) Add 25 mmol nickel acetate tetrahydrate, 10 mmol cobalt acetate tetrahydrate, 15 mmol manganese acetate tetrahydrate and 100 mmol urea to 50 mL template organic solution obtained in step (1). / min, stirred and dissolved for 1h to obtain a mixed solution;
[0046] (3) Transfer the mixed solution obtained in step (2) to the lining of a 100 mL polytetrafluoroethylene reactor, place it in a stainless steel reactor, seal it, and conduct a hydrothermal reaction at 160 °C for 14 h, then cool naturally to At room temperature, filter, wash, and dry to obtain the precursor Ni of the ternar...
Embodiment 2
[0055] The porous nickel-cobalt lithium manganese oxide ternary positive electrode material LiNi 0.6 co 0.2 mn 0.2 o 2 Mainly made by:
[0056] (1) Add 0.1770 g of polyether P123 into 30 mL of a mixed solution of water and glycerol (volume ratio 2:1), stir and dissolve for 5 h at room temperature at a stirring speed of 300 r / min to obtain 30 mL of template organic solution;
[0057] (2) Add 30 mmol nickel acetate tetrahydrate, 10 mmol anhydrous cobalt acetate, 10 mmol anhydrous manganese acetate and 100 mmol urea to the 30 mL template organic solution obtained in step (1). min, stir and dissolve for 2 hours to obtain a mixed solution;
[0058] (3) Transfer the mixed solution obtained in step (2) to the lining of a 100 mL polytetrafluoroethylene reactor, place it in a stainless steel reactor, seal it, and conduct a hydrothermal reaction at 180 °C for 12 h, then cool naturally to At room temperature, filter, wash, and dry to obtain the precursor Ni of the ternary cathode m...
Embodiment 3
[0067] The porous nickel-cobalt lithium manganese oxide ternary positive electrode material LiNi 0.8 co 0.1 mn 0.1 o 2 Mainly made by:
[0068] (1) Add 0.1775 g of polyether P123 into 70 mL of a mixed solution of water and glycerol (volume ratio 0.5:1), stir and dissolve for 4 h at room temperature with a stirring speed of 500 r / min, and obtain 70 mL of template organic solution;
[0069] (2) Add 40 mmol nickel acetate tetrahydrate, 5 mmol anhydrous cobalt acetate, 5 mmol manganese acetate dihydrate and 100 mmol urea to the 70 mL template organic solution obtained in step (1). / min, stirred and dissolved for 3h to obtain a mixed solution;
[0070](3) Transfer the mixed solution obtained in step (2) to the lining of a 100 mL polytetrafluoroethylene reactor, place it in a stainless steel reactor, seal it, and conduct a hydrothermal reaction at 140 °C for 16 h, then cool naturally to At room temperature, filter, wash, and dry to obtain the precursor Ni of the ternary cathod...
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