Apparatus and method for measuring volume resistivity of powder
A technology of volume resistivity and resistivity
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Embodiment 1
[0037] This example is used to illustrate the device and method for measuring the volume resistivity of powder provided by the present invention.
[0038] prepared as figure 1 device shown.
[0039] The material of the insulating base 4 is plexiglass, and its size is 12 centimeters (length) × 12 centimeters (width) × 0.4 centimeters (height). The conductor (ie, the lower conductor) is vertically installed on the insulating base 4 , and the lower conductor is vertically inserted into the cavity of the insulating silo 2 through the opening at one end of the insulating silo 2 . The cavity of the insulating silo 2 is cylindrical in shape with a height of 10 cm and a cross-sectional area of 0.785 cm 2 ; The part of the lower conductor inserted into the cavity of the insulating silo 2 is a cylinder with a height of 2 cm. The conductor (i.e., the upper conductor) is a cylinder with a height of 10 cm and a cross-sectional area of 0.785 cm 2 ; The scale is marked on the upper c...
Embodiment 2
[0045] This example is used to verify the measurement results of Example 1.
[0046] The electrode materials numbered 1-4 in Table 1 of Example 1 were mixed uniformly with 90 parts by weight of solvent N-methylpyrrolidone (NMP) respectively to prepare positive electrode slurry, and the positive electrode slurry was evenly coated on the surface of aluminum foil, After drying, press to a compacted density of 3.9 g / cm3 to obtain a positive electrode sheet. The electrode materials numbered 5-8 in Table 1 of Example 1 were mixed uniformly with 90 parts by weight of solvent N-methylpyrrolidone (NMP) respectively to prepare positive electrode slurry, and the positive electrode slurry was evenly coated on the surface of aluminum foil, After drying, press to a compacted density of 3.7 g / cm3 to obtain a positive electrode sheet.
[0047] Negative electrode material (100 parts by weight of negative electrode active material graphite, 5 parts by weight of binder polytetrafluoroethylene) ...
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