Sample table for in-situ electrochemical scanning electron microscope observation and test system

Abstract

The invention discloses a sample table for in-situ electrochemical scanning electron microscope observation and a test system. The sample table comprises a sample table body and a sample fixing assembly, a containing cavity is formed in the sample table body, the sample fixing assembly is movably arranged in the containing cavity, the sample fixing assembly and the containing cavity form an air bin in an enclosing mode, and protective gas is pre-stored in the air bin. The protective gas can be exhausted through a one-way gas valve, and the sample fixing assembly can be driven by an external force to move between a first station and a second station. According to the sample table, the solid-state battery can be mounted in the sample table main body, so that atmosphere protection of active metal in the battery is realized, monitoring of internal pressure change of the battery can be realized in a charging and discharging process at a specific temperature, and change of a microstructure of the battery can be observed by a scanning electron microscope; and electrochemical -EM in-situ real-time observation is realized.

Description

technical field [0001] The invention particularly relates to a sample stage and a testing system for in-situ electrochemical scanning electron microscope observation, and belongs to the technical field of in-situ electrochemical scanning electron microscope observation. Background technique [0002] The observation of the internal microstructure of lithium batteries is mostly concentrated on dismantling the cycled battery under the traditional battery system, and then studying the microstructure of the pole piece through SEM, but there are not many real-time and in-situ experimental observations. In-situ observation cannot characterize the change process of the microstructure in real time, and it is difficult to evaluate the control effect of various methods on the microstructure, and the disadvantages of battery dismantling, such as exposure of the pole piece and side reactions caused by air contact, will also damage the microstructure. The surface state of the sheet, there...

AI Technical Summary

Problems solved by technology

[0006] b. The in-situ battery installation is cumbersome and easy to damage lithium;

[0007] c can only observe the morphology while charging, and cannot perform the internal pressure test of the battery;

[0008] d only tested at room temperature, no temperature control function

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