A high-safety lithium-ion battery composite pole piece and its preparation method, lithium-ion battery
A lithium-ion battery, high-safety technology, applied in the direction of battery electrodes, electrode manufacturing, electrode collector coating, etc., can solve the problems of difficulty in controlling the consistency of lithium-ion batteries, achieve large specific surface area, increase transmission rate, The effect of improving safety performance
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Embodiment 1
[0058] The high-safety lithium-ion battery composite pole piece of the present embodiment, as figure 1 As shown, a current collector 1 is included, and both sides of the current collector 1 are sequentially provided with an undercoat layer 2 , an active material layer 3 and a ceramic layer 4 along a direction away from the current collector 1 . The current collector is an aluminum mesh with a thickness of 25 μm, a porosity of 50%, and a pore diameter of 20 μm; the primer layer is composed of a binder, polyacrylonitrile polymer microspheres and graphene, and the binder, polyacrylonitrile polymer microspheres The mass ratio of balls and graphene is 15:50:20; the active material layer is made of LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , carbon black conductive agent and binder composition, LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , The mass ratio of carbon black conductive agent and binder is 92:4:4; the ceramic layer is made of Al 2 o 3 Composition of ceramic particles and binder, Al 2 o 3 Th...
Embodiment 2
[0069] The high-safety lithium-ion battery composite pole piece of this embodiment includes a current collector, and the two sides of the current collector are sequentially provided with an undercoat layer, an active material layer and a ceramic layer along a direction away from the current collector. The current collector is an aluminum mesh with a thickness of 25 μm, a porosity of 40%, and a pore size of 10 μm; the primer layer is composed of a binder, polystyrene polymer microspheres, and the binder, polystyrene polymer microspheres and graphite The mass ratio of alkenes is 10:30:30; the active material layer is made of LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , carbon black conductive agent and binder composition, LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , The mass ratio of carbon black conductive agent and binder is 90:5:5; the ceramic layer is made of TiO 2 Composition of ceramic particles and binder, TiO 2 The mass ratio of ceramic particles and binder is 60:40, TiO 2 The average particle...
Embodiment 3
[0080] The high-safety lithium-ion battery composite pole piece of this embodiment includes a current collector, and the two sides of the current collector are sequentially provided with an undercoat layer, an active material layer and a ceramic layer along a direction away from the current collector. The current collector is an aluminum mesh with a thickness of 25 μm, a porosity of 60%, and a pore size of 30 μm; the primer layer is composed of a binder, polyvinyl alcohol polymer microspheres and graphene, and the binder, polyvinyl alcohol polymer microspheres The mass ratio of balls and graphene is 20:70:30; the active material layer is made of LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , carbon black conductive agent and binder composition, LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 , the mass ratio of carbon black conductive agent and binding agent is 95:2:3; Ceramic layer is made up of MgO ceramic particle and binding agent, and the mass ratio of MgO ceramic particle and binding agent is 90:10, and...
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Abstract
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