Cell and its preparing method

Abstract

The disclosed battery includes a positive pole, a negative pole and barrier membrane between positive pole and negative pole. Surfaces of positive pole and negative pole faced to the said barrier membrane are as inner surfaces. There are multiple cascaded grooves or zigzag structure on inner surface. The preparation method includes steps: providing positive and negative poles; fabricating multiple cascaded grooves or zigzag structure on inner surface by using photo-etching technique. The disclosed battery increases energy density of battery remarkably, being suitable to lithium cell or macromolecule lithium cell.

Description

【Technical field】 [0001] The invention relates to a battery and its preparation method. 【Background technique】 [0002] A battery is a device that converts chemical energy into electrical energy. Because it has the advantages of portability, multiple combinations, high energy density, and no emission of noise and exhaust gas, it is widely used in many fields, especially computers (Computing), communications ( Communication) and the 3C industry of consumer electronics (ConsumerElectronics). [0003] The battery is mainly composed of four parts: electrodes (including positive and negative electrodes), electrolyte, separator and tank. Generally, there are two ways to increase the energy density of batteries: one is to increase the energy density of batteries by developing electrode materials with high load capacity, such as lithium battery negative electrodes from natural graphite to carbon nanotubes; the other is to increase the reaction contact area of ​​battery electrodes s...

AI Technical Summary

Problems solved by technology

Generally, the reaction surface of a battery electrode is a flat surface or a naturally formed porous surface structure, and its effective electrode surface area (Surface Area of ​​Electrodes) is limited to a flat surface or a porous surface, such as directly increasing the battery electrode in a unit space or using a coil Although the battery electrode method can increase the energy density of the battery electrode, it increases the volume or weight of the battery accordingly, which is not conducive to the development of battery miniaturization.

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