Preparation method of lithium ion battery anode composite material and special device thereof
A technology for lithium ion batteries and composite materials is applied in the field of preparation of positive electrode composite materials for lithium ion batteries, which can solve problems such as affecting battery performance, reducing filling amount, poor mixing uniformity, etc. The effect of increasing the bulk density
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[0039] Example 1
[0040] The present invention is a preparation method of a lithium ion battery positive electrode composite material, which utilizes a plasma enhanced chemical vapor deposition method to synthesize an in-situ carbon nanotube-coated lithium ion battery positive electrode material LiFePO 4 , which includes the following steps:
[0041] (1) Mix 2.86 g (0.05 mol) of metallic iron powder, 15.1 g (0.1 mol) of iron phosphate, and 6.37 g (0.05 mol) of lithium phosphate, and put the above mixture into a ball-milling container in an argon atmosphere, and ball-mill 48 h, place the ball milled product in a plasma reaction device, and use a mechanical pump to evacuate the reaction chamber to remove impurities and water vapor. When the pressure of the reaction chamber is less than 5 Pa, a reducing gas H is introduced 2 To a pressure of 100 Pa, heat the ball milled product to 300 oC , treated at a constant temperature for 10 min to remove oxides on the surface of the bal...
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[0044] Example 2
[0045] The present invention is a preparation method of a lithium ion battery cathode composite material, which utilizes a plasma-enhanced chemical vapor deposition method to synthesize an in-situ growth carbon nanosheet-coated lithium ion battery cathode material LiFePO 4 , including the following steps:
[0046] (1) Mix 2.86 g (0.05 mol) of metallic iron powder, 15.1 g (0.1 mol) of iron phosphate, and 6.37 g (0.05 mol) of lithium phosphate, and put the above mixture into an argon-filled ball-milling container for 36 hours. , the ball-milled product is placed in a plasma reaction device, the reaction chamber is evacuated by a mechanical pump to remove impurities and water vapor, and then a reducing gas H is introduced 2 To a pressure of 500 Pa, heat the ball milled product to 200 oC , treated at a constant temperature for 20 min, to remove oxides on the surface of the ball-milled product to obtain a substrate material;
[0047] (2) Raise the temperature...
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[0049] Example 3
[0050] The present invention is a preparation method of a lithium ion battery positive electrode composite material, which utilizes a plasma-enhanced chemical vapor deposition method to synthesize an in-situ-grown graphene-coated lithium ion battery positive electrode material LiFePO 4 , including the following steps:
[0051] (1) Mix 2.86 g (0.05 mol) of metallic iron powder, 15.1 g (0.1 mol) of iron phosphate, and 6.37 g (0.05 mol) of lithium phosphate in proportion, and put the above mixture into a ball milling container in an argon atmosphere, Ball milled for 48 h, the ball milled product was placed in the plasma reaction device as a substrate, the reaction chamber was evacuated by a mechanical pump to remove impurities and water vapor, and the pressure was reduced to below 5 Pa, and then a reducing gas H was introduced 2 To a pressure of 1000 Pa, heat the ball milled product to 100 oC , treated at a constant temperature for 30 min, to remove oxides o...
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