Composite material preparation method, battery positive electrode, battery and preparation method thereof
A composite material and cathode technology, which is applied in the field of batteries, can solve the problems of low specific energy of lithium-ion batteries, complex production process of cathode materials, and strict production conditions, and achieve the effects of simple manufacturing, improved cruising range, and low cost
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Embodiment 1
[0043] Such as figure 1 Shown, a kind of lithium-rich-nickel-cobalt lithium manganese oxide composite material preparation method, described lithium-rich-nickel cobalt lithium manganate composite material preparation method, comprises the following steps:
[0044] The lithium-rich material accounting for 50% by mass and the nickel-cobalt-lithium manganese oxide material accounting for 50% by mass are mixed with a double planetary mixer, the speed of the double planetary mixer is 20r / min-60r / min, and the stirring time is 1h-3h ; Preferably, the speed of the double planetary mixer is set to 40r / min, and the stirring time is 2h.
[0045] The lithium-rich material and the nickel-cobalt-lithium-manganese-oxide material are dry-based materials. The direct mixing of dry-based materials saves the preparation of solution gel process steps, and at the same time can more accurately control the lithium content of the introduced materials, the process is simpler, and the material quality ...
Embodiment 2
[0057] combine figure 1 , a positive electrode of a lithium ion battery, the positive electrode of the battery comprises the following components in mass percentage: 95%-97% of lithium-rich-nickel-cobalt lithium manganese oxide, 0.5%-3% of a conductive agent and 1%-2% of a binder ;
[0058] Wherein, the lithium-rich-nickel-cobalt lithium manganese oxide is adopted such as figure 1 The preparation method of the lithium-rich-nickel-cobalt lithium manganese oxide composite material is shown.
[0059] Specifically, the conductive agent includes 0.5%-2% of Super-P and 0-1% of carbon nanotubes, and the binder is polyvinylidene fluoride.
[0060] A method for making a positive electrode of a lithium ion battery, comprising the following steps:
[0061] Weigh active material particles rich in lithium-nickel cobalt lithium manganate 95%, Super-P conductive agent 2%, carbon nanotube conductive agent 1% and binding agent polyvinylidene fluoride 2% by the mass percentage of each materi...
Embodiment 3
[0068] combine figure 1 , a lithium-ion battery, including a positive electrode and a negative electrode, the positive electrode of the battery includes the following components in mass percentage: 95-97% of lithium-rich-nickel-cobalt lithium manganese oxide, 0.5%-3% of conductive agent, and binder 1 %-2%;
[0069] Wherein, the lithium-rich-nickel-cobalt lithium manganate is adopted figure 1 The preparation method of the composite material is obtained.
[0070] Such as figure 2 and image 3 Shown, a kind of preparation method of lithium ion battery comprises the following steps:
[0071] Weigh 95% of active material particles rich in lithium-nickel cobalt lithium manganese oxide, 2% of Super-P conductive agent, 1% of carbon nanotube conductive agent and 2% of binder polyvinylidene fluoride according to the mass percentage of each substance; prepare positive electrode Slurry and make battery positive electrode sheet;
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