Chloride ion doped modified lithium-rich layered anode material and preparation method thereof
A lithium-rich positive electrode material and a technology for positive electrode materials, which are applied in the field of chloride ion-doped modified lithium-rich layered positive electrode materials and their preparation, can solve the problems of poor rate performance and low first-time Coulombic efficiency, and achieve improved rate performance and raw materials. Rich reserves, smooth surface effect
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Embodiment 1
[0029] (1) Weigh lithium acetate, nickel acetate, manganese acetate, and cobalt acetate according to the molar ratio of 1.236:0.1:0.5:0.2 and add 5mL of deionized water to make the mixed raw materials into a paste, ball mill for 2~5h, Until the entire reaction system forms a rheological phase.
[0030] (2) Dry the rheological phase in a blast drying oven at 80-120°C for 10-15 hours to remove the solvent by evaporation to obtain a solid-phase product;
[0031] (3) Put the solid-phase product in a muffle furnace for calcination at a heating rate of 5°C / min, raise the temperature to 400-600°C, and calcine for 6-9 hours to obtain the precursor;
[0032] (4) After the precursor is cooled to room temperature, grind it in a mortar for 0.5-1 hour, compact the ground precursor and place it in a muffle furnace, and then calcine it under oxygen-enriched conditions or in an air atmosphere. The heating rate is 3-8°C / min, heating up to 800-950°C, calcining for 12 hours, and cooling to room...
Embodiment 2
[0038] (1) Weigh lithium acetate, nickel acetate, manganese acetate, cobalt acetate, and lithium chloride according to the molar ratio of 1.211:0.1:0.5:0.2:0.025 and add 5mL of deionized water to make the mixed raw materials into a paste , ball milling for 2~5h, until the entire reaction system forms a rheological phase.
[0039] (2) Dry the rheological phase in a blast drying oven at 80-120°C for 10-15 hours to remove the solvent by evaporation to obtain a solid-phase product;
[0040] (3) Put the solid-phase product in a muffle furnace for calcination at a heating rate of 5°C / min, raise the temperature to 400-600°C, and calcine for 6-9 hours to obtain the precursor;
[0041] (4) After cooling the precursor to room temperature, grind it in a mortar for 0.5 to 1 hour, compact the ground precursor and place it in a muffle furnace, and calcine it under oxygen-enriched conditions or in an air atmosphere. The heating rate is 3-8°C / min, heating up to 800-950°C, calcining for 12 ho...
Embodiment 3
[0044] (1) Weigh lithium acetate, nickel acetate, manganese acetate, cobalt acetate, and lithium chloride according to the molar ratio of 1.186:0.1:0.5:0.2:0.05 and add 5mL of deionized water to make the mixed raw materials into a paste , ball milling for 2~5h, until the entire reaction system forms a rheological phase.
[0045] (2) Dry the rheological phase in a blast drying oven at 80-120°C for 10-15 hours to remove the solvent by evaporation to obtain a solid-phase product;
[0046] (3) Put the solid-phase product in a muffle furnace for calcination at a heating rate of 5°C / min, raise the temperature to 400-600°C, and calcine for 6-9 hours to obtain the precursor;
[0047] (4) After cooling the precursor to room temperature, grind it in a mortar for 0.5 to 1 hour, compact the ground precursor and place it in a muffle furnace, and calcine it under oxygen-enriched conditions or in an air atmosphere. The heating rate is 3-8°C / min, heating up to 800-950°C, calcining for 12 hou...
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