A composite ceramic coating lithium battery positive and negative electrode sheet and lithium battery
A technology of positive and negative plates and composite ceramics, applied in non-aqueous electrolyte battery electrodes, electrode manufacturing, secondary batteries, etc., to achieve low production costs, good safety, and good conductivity
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Embodiment 1
[0030] In this embodiment, alumina ceramic coating is firstly coated on the positive and negative plates of lithium battery, and two kinds of ceramic particle powders with different shapes and particle sizes are mixed with binder and organic solvent, stirred evenly, and made into ceramic slurry. The particle sizes of these ceramic particle powders are about 350nm and 550nm respectively. After the coating is completed, put them into an oven and dry them to make a ceramic coated pole piece. Afterwards, the positive and negative pole pieces are assembled into a lithium battery. A liquid electrolyte is injected between the sheet and the negative ceramic-coated pole piece, without the use of a battery separator, and a separator-free lithium battery is assembled. Since the use of the diaphragm is eliminated, the energy density of the lithium battery in this embodiment is greatly increased. After the heat resistance test, it was found that under the condition of 400 degrees Celsius, ...
Embodiment 2
[0032] This embodiment is combined with embodiment 1. On the basis of embodiment 1, a solid electrolyte layer 3 is arranged outside the ceramic layer. The solid electrolyte layer 3 is composed of 45% by mass percentage of lithium iron phosphate, 15% of binder, and carbon nanofiber conductive agent. Composition of 40%, an adhesive layer 4 is provided between the solid electrolyte layer 3 and the ceramic layer, the adhesive layer is a polymer organic adhesive commonly used in lithium batteries, and a surface coating 5 is provided on the outside of the solid electrolyte layer 3, the surface coating 5 is composed of ceramics, 3% LiBF is added in ceramic layer 1 4 . The solid electrolyte layer 3 is an electrolyte layer, so that the lithium battery has both the excellent properties of a solid electrolyte and a liquid electrolyte. The surface coating prevents the solid electrolyte layer 3 from interacting with or affecting the electrolyte layer. A layer of surface coating is applied ...
Embodiment 3
[0034] This embodiment combines Figure 1-Figure 3 A composite ceramic coated lithium battery positive and negative pole pieces, comprising a ceramic layer 1 and a pole piece head 2, a conductor cavity 11 is arranged in the ceramic layer 1, an assembly port 12 is arranged at the end of the ceramic layer 1, and the conductor cavity 11 is filled with metal lithium , the pole piece head 2 is inserted into the assembly port 12, the pole piece head 2 and the metal lithium filled form the current collecting layer of the pole piece, the pole piece head 2 forms a seal to the assembly port 12, and the pole piece head 2 is made of copper sheet. After the heat resistance test, it was found that under the condition of 400 degrees Celsius, the pole piece of this example was intact. After 500 charge-discharge cycle tests were carried out after assembling the lithium battery, the coating did not fall off or be consumed, and the resistivity was ordinary organic adhesive. One-third of the coat...
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Abstract
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