Electroplating preparation method of lithium ion battery with reference electrode

Abstract

The invention relates to an electroplating preparation method of a lithium ion battery with a reference electrode, and belongs to the technical field of electrode potential detection and electrode manufacturing. A reference electrode can be inserted to a battery in advance, and then the process of electroplating a lithium ion battery to the reference electrode is completed by electroplating method; or the electroplating of the reference electrode is completed by means of an electrolytic tank and other devices; then the reference electrode is inserted to the battery to complete the manufacturing of a three-electrode battery with the reference electrode. When the metal lithium is electroplated to the surface of a base piece, the porous property of the base piece is remained, thus the small molecules in the electrolyte can pass through the hole. Meanwhile, the thickness of a plating layer of a lithium layer on the base piece is controlled, the porous property of the base piece material isremained; meanwhile, the material loads as much as lithium to meet the testing demand. The reference electrode prepared by the invention has long service life, simple manufacturing technique and canmeet the industrial production; thus the industrial production and application of the lithium ion battery with the reference electrode are possible to realize.

Description

technical field [0001] The invention relates to an electroplating preparation method of a lithium ion battery with a reference electrode, and belongs to the technical field of electrode potential detection and electrode production. Background technique [0002] Electrode potential is a very important parameter in the research technology of electrochemistry and battery. The electrode potential in a thermodynamic equilibrium state is the open circuit potential. In practical applications, the voltage-SOC curve obtained by charging and discharging with a small current can be approximately considered to be the open circuit voltage curve of the battery. When a current flows through the electrodes, the electrodes are polarized, and the electrode potential shifts due to the generation of an overpotential. By measuring the potential change curve of a single electrode, the detailed information of the internal reaction of the electrode can be obtained. For example, for lithium-ion ba...

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Problems solved by technology

However, this physical connection method is difficult to ensure that the connection between lithium and copper is firm. If the connection is poor, the ohmic resistance of the reference electrode will be extremely large, which will affect the use of the reference electrode.

[0005] In summary, the current development dilemma of the reference electrode is mainly caused by the lithium content of the electrode: in order to reduce the barrier effect of the reference on lithium ions in the electrolyte, the size of the reference electrode must be reduced as much as possible, but the overall content of the material will be reduced. The amount of lithium is less, the signal is weak, and it is easy to cause electrode loss or potential drift due to the measurement of micro current

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