Three-electrode battery capable of detecting lithium dendritic crystal growth and method

Abstract

The invention provides a three-electrode battery capable of detecting lithium dendritic crystal growth, which comprises a battery body, a positive electrode column, a negative electrode column and a detection electrode column, the battery body is respectively provided with the positive electrode column and the negative electrode column, the battery body is internally provided with an electrolyte,and the detection electrode column is arranged between the positive electrode column and the negative electrode column; a liquid injection hole is formed between the positive electrode column and thedetection electrode column, an isolating membrane is arranged on the outer layer of the detection electrode column, and the isolating membrane is used for preventing the detection electrode column from being in contact with the positive electrode column and the negative electrode column to cause short circuit. The invention has the beneficial effects that the design of the detection electrode column does not change the internal positive and negative electrode cell structure of the original battery; the normal work of the battery is not influenced, the change of the internal resistance among the three electrode columns can be more conveniently and accurately detected, more importantly, the lithium dendritic crystal growth progress of the lithium battery is accurately detected by detecting the change of the internal resistance of the electrode columns and the negative electrode columns, and the normal service life of the battery is accurately predicted in advance.

Description

【Technical field】 [0001] The invention relates to the technical field of lithium battery production, in particular to a three-electrode battery capable of detecting lithium dendrite growth and a method thereof. 【Background technique】 [0002] Due to the incomparable advantages of other batteries such as light weight, high efficiency and high energy density, lithium batteries have made great progress in the past ten years and have been widely used in various modern mobile devices, such as mobile phones, notebook computers, electric vehicles, One of the most sought-after energy storage systems for many devices, such as electric vehicles. Although it has been very successful commercially, it still has obvious disadvantages: the inherent defects in the structural design of traditional lithium batteries make lithium batteries have inevitable safety hazards, which are easy to cause explosions or fires. In recent years, there have been a series of incidents related to the combusti...

AI Technical Summary

Problems solved by technology

Although it has been very successful commercially, it still has obvious disadvantages: the inherent defects in the structural design of traditional lithium batteries make lithium batteries have inevitable safety hazards, which are easy to cause explosions or fires, etc.

However, there is another fatal defect in the battery that chooses metal lithium as the negative electrode. During the deposition process of the negative electrode, lithium ions will spontaneously form dendrites. To solve this problem, scientists have proposed a variety of solutions. Physical methods try to suppress the generation or growth of dendrites, but they cannot completely eliminate the formation of dendrites.

So far, the problem of dendrite growth of lithium metal during cycling has not been solved. Therefore, stable lithium deposition and inhibition of lithium dendrite growth are the most urgent key issues that need to be solved in rechargeable lithium metal batteries.

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