Superbattery polar plate containing vacuum puffed grapheme, preparation method thereof and lead acid superbattery assembled thereby
A vacuum puffing and super battery technology, which is applied to battery electrodes, lead-acid battery electrodes, lead-acid batteries, etc., can solve the problems of small specific capacitance and poor rate performance, and achieve the effects of improved rate performance, developed pores, and sufficient separation
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specific Embodiment approach 1
[0048] Embodiment 1: The super battery pole plate comprising vacuum expanded graphene of this embodiment is composed of a current collector and an electrode material coated on the current collector, and the electrode material includes a capacitive electrode active material and a battery electrode active material The capacitive electrode active material includes vacuum expanded graphene, and the mass of the vacuum expanded graphene accounts for 0.01% to 20% of the mass of the battery electrode active material.
[0049] In the super battery pole plate comprising vacuum expanded graphene of the present embodiment, the vacuum expanded graphene in the electrode paste is used as a capacitive electrode active material, and a capacitive current is provided through the charge and discharge process of the electric double layer on the rich surface of the vacuum expanded graphene; In the electrode paste, there is also an electrode active material of the battery that stores electrical energ...
specific Embodiment approach 2
[0050] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the preparation method of vacuum expanded graphene is carried out according to the following steps:
[0051] 1. Oxidize graphite into graphite oxide;
[0052] 2. Put the graphite oxide obtained in step 1 into a vacuum heating furnace, first evacuate to -0.07MPa~-0.1MPa, then raise the temperature to 100℃~800℃ at a rate of 5℃ / min~100℃ / min and keep 1min to 3h to obtain vacuum-expanded graphene. Others are the same as in the first embodiment.
specific Embodiment approach 3
[0053] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the preparation method of vacuum expanded graphene is carried out according to the following steps:
[0054] 1. Oxidize graphite into graphite oxide;
[0055] 2. Put the graphite oxide obtained in step 1 into a vacuum heating furnace, first evacuate to -0.07MPa~-0.1MPa, then raise the temperature to 100℃~800℃ at a rate of 5℃ / min~100℃ / min and keep 1min~3h;
[0056] 3. Put the graphite oxide treated in step 2 in an atmosphere-protected heating furnace, and in an inert gas atmosphere, raise the temperature to 200-900°C at a rate of 1°C / min-100°C / min and keep it for 10min-3h. Vacuum expanded graphene is obtained. Others are the same as in the first embodiment.
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