Three-electrode lithium ion battery and manufacturing method thereof

Abstract

The invention provides a three-electrode lithium ion battery and a manufacturing method thereof. The reference electrode of the three-electrode lithium ion battery is a lithium iron phosphate pole piece. The lithium iron phosphate material is stable, and is less likely to be oxidized in the air, and is not necessary to be carried out in a glove box as a reference electrode. The lithium iron phosphate is cheaper than precious metal three-electrode materials such as metal platinum and the like. A polarization curve of the lithium iron phosphate is an approximate vertical line, and has stable potential and high test accuracy as a reference electrode.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a three-electrode lithium ion battery and a manufacturing method thereof. Background technique [0002] With the development of the lithium-ion battery industry, the research on the battery is getting more and more in-depth. The normal lithium-ion battery can only study the overall electrochemical performance of the battery, which cannot satisfy the separate research on the positive and negative electrodes of the battery. Therefore, it is necessary to introduce the first The three electrodes, namely the reference electrode, are used to study the positive and negative performance of the battery separately. The materials of the reference electrode of existing lithium-ion batteries are basically copper, lithium, stainless steel or platinum, but copper and stainless steel will disturb the electrical signal and affect the test accuracy. Lithium is easy to oxidize and the operation...

AI Technical Summary

Problems solved by technology

[0002] With the development of the lithium-ion battery industry, the research on the battery is getting more and more in-depth. The normal lithium-ion battery can only study the overall electrochemical performance of the battery, which cannot satisfy the separate research on the positive and negative electrodes of the battery. Therefore, it is necessary to introduce the first Three electrodes, that is, reference electrodes, are used to study the positive and negative performance of the battery separately

The materials of the reference electrode of existing lithium-ion batteries are basically copper, lithium, stainless steel or platinum, but copper and stainless steel will disturb the electrical signal and affect the test accuracy. Lithium is easy to oxidize and the operation steps are complicated, while platinum is more expensive. high

At present, there is still a lack of a three-electrode lithium-ion battery with stable test, high precision, simple operation and low cost.

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