A dry method for preparing positive and negative electrodes for lithium batteries
A technology of positive and negative electrodes and lithium batteries, which is applied in the manufacture of battery electrodes, secondary batteries, and electrolyte batteries, can solve problems such as heavy pollution, high cost of solvents, and difficult recycling, so as to avoid difficult recycling, reduce specific surface area, The effect of reducing side effects
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[0060] The preparation method of the polymer composite solid electrolyte is as follows:
[0061] (1) mixing polyphenylene sulfide particles with lithium salt;
[0062] (2) adding an organic quinone electron acceptor to the above mixture, the oleyl quinone electron acceptor;
[0063] Then the mixture was placed in a sealed reactor for reaction, and then cooled to room temperature to obtain a polymer composite solid electrolyte.
[0064] The lithium salt is lithium hydroxide and / or lithium carbonate;
[0065] The mass ratio of polyphenylene sulfide and lithium hydroxide and / or lithium carbonate described in step (1) is 100:(15-50); The mixing is that the mixture is made into powder with a particle size of 0.5-2 μm by jet milling , mix well.
[0066] The mass ratio of the polyphenylene sulfide to the organic quinone electron acceptor in step (2) is 100:(40-80). The reaction condition of the reaction kettle is that the temperature is 200-350° C. and the time is 0.5-2 hours.
Embodiment 1
[0068] A dry method for preparing lithium battery positive and negative plates, the steps are as follows:
[0069] (1) Preparation of positive pole piece:
[0070] a) Weighing 2wt% of carbon black and 5wt% of PAA, using a mixer with strong shear force to mix at a speed of 300r / min for 5h, and controlling the stirring temperature to 20°C;
[0071] b) Then use the jet mill to mechanically mix the dry powder in step a), the inlet pressure reaches 0.5MPa, and the feeding pressure is 0.5MPa;
[0072] c) adding the material obtained in step b) to 90wt% active material LiMn 2 o 4 and 3wt% polymer solid electrolyte powder, using a stirrer to mix at a speed of 50r / min for 2h, and control the stirring temperature to 20°C;
[0073] d) Add the material obtained in step c) to calcium stearate accounting for 1 wt% of the total powder mass, use a mixer to mix at a speed of 50 r / min for 1 hour, and control the stirring temperature to 20° C.;
[0074] e) extruding the material obtained in ...
Embodiment 2
[0091] A dry method for preparing lithium battery positive and negative plates, the steps are as follows:
[0092] (1) Preparation of positive pole piece:
[0093] a) Weigh 2wt% of conductive agent carbon black, 1wt% of CNT, and 8wt% of PVDF binder, use a mixer with strong shear force to mix at 500r / min for 2h, and control the stirring temperature at 40°C;
[0094] b) Then use the jet mill to mechanically mix the dry powder in step a), the inlet pressure reaches 1.0MPa, and the feeding pressure is 0.8MPa;
[0095] c) adding 85 wt% active material LiCoO to the material obtained in step b) 2 Mix with 4wt% NASICON solid electrolyte powder at 100r / min for 0.75h with a stirrer, and control the stirring temperature at 40°C;
[0096] d) Add the material obtained in step c) to polyethylene wax accounting for 2wt% of the total mass of the powder, use a stirrer to mix at 100r / min for 1h, and control the stirring temperature at 30°C;
[0097] e) extruding the material obtained in step...
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