Preparation method of positive electrode post of lithium battery

Abstract

The invention relates to a preparation method of a positive electrode post of a lithium battery, which comprises: step (1) mixing and stirring solid raw materials and liquid materials according to a certain ratio to prepare the raw material of a positive electrode, wherein the solid raw material is powder; step (2) preparing the raw material of the positive electrode into granules, wherein the diameter of the granules is 1 mm to 3 mm; step (3) firing the granules; and step (4) molding and forming the product. The method adopts granulation technique to process the raw material of the positive electrode, and then molds the granules for formation to prepare the positive electrode post of the lithium battery. The method can enlarge and increase the space inside the positive electrode post, thus the products inside the lithium battery do not block the space inside the positive electrode post easily. The method is more beneficial for electrolyte absorption, ion exchange and utilization rate of the positive electrode of the lithium battery, and guarantees the electricity conduction effect of the positive electrode of the lithium battery. Therefore, with the adoption of the positive electrode post, prepared by the method, of the lithium battery, the discharging capacity and the overall performance of the lithium battery can be effectively increased.

Description

technical field [0001] The invention relates to a lithium battery, in particular to a lithium battery positive pole, in particular to a preparation method for the lithium battery positive pole. Background technique [0002] Lithium batteries include positive poles. At present, the positive poles of lithium batteries are prepared by the following methods: [0003] Mix and stir acetylene black, polytetrafluoroethylene, copper powder, water, isopropanol and other raw materials (wherein the solid raw material is powdery) to make positive electrode raw materials, burn them, and then extrude them through a molding machine to obtain the desired Dimensional lithium battery positive pole. [0004] The positive pole column of lithium battery prepared by the above-mentioned method (such as image 3 As shown), it is a porous acetylene black mixture with small internal voids. During the discharge process of the lithium battery, the internal products of the lithium battery will block the...

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Problems solved by technology

[0004] The positive pole column of lithium battery prepared by the above-mentioned method (such as image 3 As shown), it is a porous acetylene black mixture with small internal voids. During the discharge process of the lithium battery, the internal products of the lithium battery will block the internal voids of the positive pole, resulting in a decrease in the conductivity of the positive pole of the lithium battery. As a result, the discharge capacity of lithium batteries is low, and the battery performance indicators required by high-capacity lithium batteries cannot be met.

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