Electrodes for lithium-ion batteries and other applications
An electrode and positive electrode technology, which is used in the field of electrodes for lithium-ion batteries and other uses, can solve the problems of inability to fully reach the battery capacity, difficulty in providing electrode materials in contact with the electrolyte, and high internal resistance of the battery.
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Embodiment 1
[0146] This example shows electrodes fabricated as follows:
[0147] Step 1. Preparation of the cathode, using NCM811 (nickel cobalt manganese 811) as the positive electrode electroactive material. The cathode was prepared as follows: (i) mixed ~3 wt% polyvinylidene fluoride (PVDF) binder in N-methyl-2-pyrrolidone (NMP) to form an NMP-binder mixture; (ii) mixed NMP - the binder mixture is mixed with positive electrode electroactive material and carbon black to form a mixture comprising 80 wt% positive electrode electroactive material, 10 wt% carbon black and 10 wt% NMP-binder mixture ("80:10:10 mixture"); (iii) Transfer the 80:10:10 mixture to a ball mill and grind the mixture at 800 rpm for 30 min with 10 zirconia balls with a diameter of 5 mm to form a slurry, where the zirconia balls are used as a medium for more efficient mixing; (iv) Prepare the current collector by spreading aluminum foil on a glass plate and spraying acetone to ensure that there are no air bubbles betw...
Embodiment 2
[0151] This example shows another electrode fabricated as follows:
[0152] Steps 1 and 2 are similar to Example 1.
[0153] Step 3. Coat the electrolyte layer on the cathode with the electrolyte prepared in step 2, then apply 15 minutes of UV exposure to the cathode. The electrolyte should solidify to form a solid electrolyte. The solvent was evaporated by exposing the cathode to a vacuum oven at 50 °C for 24 hours to form an electrode. In one embodiment, the thickness of the electrolyte may be 20 microns.
Embodiment 3
[0155] This example shows yet another electrode fabricated as follows:
[0156] Steps 1 and 2 are similar to Example 1.
[0157] Step 3. Soak the cathode prepared in step 1 into the electrolyte at 65° C. for 10 hours. The electrode material should be surrounded by the electrolyte, and the pores between the electrode material particles can be filled by the electrolyte. A 5 minute UV exposure was applied to the cathode. The electrolyte should solidify to form a solid electrolyte. The solvent was evaporated by exposing the cathode to a vacuum oven at 55°C for 48 hours to form an electrode.
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Abstract
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