Composite anode material LiMnPO4-Li3V2(PO4)3/C for lithium ion battery and preparation method of material
A composite positive electrode material and lithium-ion battery technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of aggravated electrolyte decomposition, battery cost increase, capacity attenuation, etc., to achieve improved electronic conductivity, low material cost, The effect of structural stability
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Embodiment 1
[0029] Dissolve 0.154mol lithium nitrate, 0.112mol manganese nitrate, 0.154mol phosphoric acid, and 0.014mol vanadium pentoxide in deionized water and stir to form a blue transparent solution. Then the solution was spray-dried in a spray dryer, the inlet temperature was 200°C, the carrier gas pressure was 0.4Mpa, and the feed flow rate was 20mL.min -1 . The precursor powder collected by the cyclone was put into a tube furnace and heat-treated at 300 °C for 1 h in air. The heat-treated product was mixed with 15% sucrose and milled in a ball mill for 6 hours at a rotational speed of 350r.min -1 . The ball-milled slurry was dried at 85 °C and then pre-fired at 350 °C for 4 h in an argon atmosphere, then calcined at 800 °C for 6 h, and then naturally cooled to obtain a composite cathode material 8LiMnPO 4 -Li 3 V 2 (PO 4 ) 3 / C. During the charge-discharge test at 0.1C and 25℃, the discharge specific capacity of the material reaches 135mAh.g -1 , the capacity retention ra...
Embodiment 2
[0032] Dissolve 0.14mol lithium acetate, 0.08mol manganese acetate, 0.14mol phosphoric acid, and 0.04mol ammonium metavanadate in deionized water and stir to form a blue transparent solution. Then the solution was spray-dried in a spray dryer, the inlet temperature was 220°C, the carrier gas pressure was 0.3Mpa, and the feed flow rate was 25mL.min -1 . The precursor powder collected by the cyclone was put into a tube furnace and heat-treated at 350 °C for 4 h in air. The heat-treated product was mixed with 4% acetylene black and 5% sucrose, and ball milled in a ball mill for 2 hours, and the speed of the ball mill was 400r.min -1 . The ball-milled slurry was dried at 100 °C and then pre-fired at 400 °C for 2 h in an argon atmosphere, then calcined at 600 °C for 12 h, and naturally cooled to obtain a composite cathode material 4LiMnPO 4 -Li 3 V 2 (PO 4 ) 3 / C. The particle size of the composite material is about 100-250 nm.
[0033] figure 2 For the lithium ion batte...
Embodiment 3
[0035] Dissolve 0.15mol lithium nitrate, 0.06mol manganese nitrate, 0.15mol phosphoric acid, and 0.03mol vanadium pentoxide in deionized water and stir to form a blue transparent solution. Then the solution was spray-dried in a spray dryer, the inlet temperature was 210°C, the carrier gas pressure was 0.6Mpa, and the feed flow rate was 80mL.min -1 . The precursor powder collected by the cyclone was put into a tube furnace and heat-treated at 400 °C for 2 h in air. The heat-treated product was mixed with 3% acetylene black and 5% glucose, and ball milled in a ball mill for 8 hours at a speed of 200 r.min -1 . The ball-milled slurry was dried at 70 °C and then pre-fired at 300 °C for 4 h in an argon atmosphere, then calcined at 750 °C for 8 h, and then naturally cooled to obtain a composite cathode material 2LiMnPO 4 -Li 3 V 2 (PO 4 ) 3 / C. The particle size of the composite material is about 100-350 nm.
[0036] image 3 For the lithium ion battery composite positive ...
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