Vertical electrochemical cell setup for in situ photomechanical measurements

Abstract

The invention relates to a vertical electrochemical battery device for in-situ photodynamic measurement. The device comprises a battery upper cover, a battery lower cover, a quartz optical window, a fixing electrode inner bushing, an electrode part and a conductive connection part. The device is characterized in that the electrode part is composed of a research electrode, a membrane and a counter electrode. The cross sections of the electrodes are parallel to the quartz window. A counter electrode sheet is fixed to an open groove of the fixing electrode inner bushing. The electrode part is arranged between the counter electrode sheet and a research electrode sheet. The counter electrode is arranged on one side of the counter electrode sheet, and the research electrode is arranged on one side of the research electrode sheet. By means of the placement mode of the electrode sheets, the cross sections of the electrode sheets can be observed, in-situ monitoring of the diffusion process of lithium ions and interface conditions of current collectors and substrates is achieved, and the movable electrode sheets can meet substrate and constraint conditions required by different tests.

Description

technical field [0001] The invention relates to the field of new energy, in particular to the field of multidisciplinary interdisciplinary measurement such as photomechanics-electrochemistry and photoelectrochemistry. In particular, it relates to a vertical electrochemical battery device for in-situ photomechanical measurement. Background technique [0002] Lithium-ion batteries have become an ideal chemical power source for electronic communication equipment and electronic products due to their advantages such as large specific energy, long cycle life, and low environmental pollution. In the work of lithium-ion batteries, the "volume effect" will be caused by the intercalation and extraction of lithium during the charging and discharging process of electrode materials, which will eventually lead to the powdering and shedding of the active material of the electrode itself, and the damage of the electrode structure, which will affect the cycle life of the battery. At present...

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Problems solved by technology

[0003] At present, the existing simulated battery with quartz optical window can basically realize the online in-situ measurement of different optics and spectroscopy. However, the measurement for deformation is a small deformation measurement, which has extremely high requirements for the optical path. The simulated battery electrode used in it is The surface is parallel to the light-transmitting window, and only the surface information of the pole piece can be observed; for lithium-ion battery electrode materials during the charge and discharge process, for the measurement of large deformation, diffusion along the thickness direction, and the interface between the current collector and the active layer In-situ observation is very important. However, the realization of the above-mentioned observations has special requirements for the electrode structure, and the cross-section of the pole piece is required to be parallel to the light-transmitting window. Therefore, there is an urgent need for a vertical electrochemical cell whose cross-section is parallel to the window to achieve the above. Measurement purpose

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