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

An in-situ electrochemical and scanning electron microscope technology, applied in measurement devices, scientific instruments, material analysis using wave/particle radiation, etc. problem, to achieve the effect of in-situ real-time observation and atmosphere protection

Inactive Publication Date: 2021-04-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
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Embodiment 1

[0055] Provide a sample battery, the sample battery uses a lithium sheet as the positive and negative electrodes of the battery, and uses a sample stage for in-situ electrochemical scanning electron microscope observation provided by the embodiment of the present invention, charging at 60°C and 0.1mA constant current Next, SEM was used to observe the shape change of the battery in situ, and the SEM images of the battery shape after charging 0h, 2.5h, 5h, 10h, 20h, 30h, and 44h were as follows: Figure 7-Figure 13 shown.

[0056] The embodiment of the present invention provides a sample stage for in-situ electrochemical scanning electron microscope observation, which can install a solid-state battery in the main body of the sample stage, realize the atmosphere protection of the active metal in the battery, and realize charging at a specific temperature. During the discharge process, the internal pressure change of the battery is monitored, and the change of its microstructure i...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/2251
CPCG01N23/2251
Inventor 蒋蓉蓉周冬邓伟李明卢焕明
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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