In-situ XRD reaction chamber for testing electrochemical reaction process

Abstract

The invention discloses an in-situ XRD reaction chamber for testing an electrochemical reaction process. The in-situ XRD reaction chamber comprises a fixing seat, a negative seat, a positive seat and a test window, wherein the negative seat is arranged on the fixing seat and comprises a negative base and a negative screw cover which are connected in a threaded mode; a first through hole is formed in the negative screw cover; a negative base body is arranged in an inner cavity of the negative screw cover; more than two air holes are formed in the negative base, and a negative lead column is arranged on the negative base; a sealing plug is arranged at the bottom end of each air hole; one end of the negative lead column is in contact with the negative base body, and the other end of the negative lead column extends out of the negative base; the positive seat comprises an annular screw cover, a positive base body arranged on the annular screw cover, and a positive lead column; the positive base body is arranged in a second through hole in the annular screw cover; a gap formed by the negative base and the negative screw cover is filled with an electrolyte; the test window is formed in the top end of the annular screw cover; a clearance is reserved between the bottom end of the test window and the top end of the positive base body. The in-situ XRD reaction chamber is simple in structure and is applicable to a two-electrode system and a three-electrode system.

Description

technical field [0001] The invention relates to an in-situ XRD reaction chamber for testing an electrochemical reaction process, and belongs to the technical field of in-situ XRD testing. Background technique [0002] In-situ XRD (XRD is X-ray diffractometer) testing technology is currently the fastest-growing XRD testing technology. In situ XRD, as the name implies, is to keep the sample immobile and measure the diffraction patterns of the same sample under different conditions (such as temperature, current and voltage, atmosphere, etc.). The advantage of in-situ testing is that it can monitor the changes of the sample when the conditions change in real time, and can truly reflect the actual changes of the system under the given conditions. For the in-situ XRD test, it is possible to truly monitor the change of the internal structure of the sample with the reaction conditions (temperature, current and voltage, atmosphere). After knowing the corresponding relationship betwe...

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Problems solved by technology

[0005] For the in-situ XRD reaction chamber, the currently commercialized one is the XRK900 reaction chamber of Anton Paar Company in Austria. It is a reaction chamber specially designed for in-situ X-ray diffraction experiments, but it is expensive and inconvenient to maintain. What is remarkable is that the appearance of different reaction systems is quite different. For example, in the in-situ XRD test of battery materials during charging and discharging, there is the extraction of battery current collectors. When studying the catalytic principle of catalysts in different atmospheres, it is necessary to have atmosphere ventilation. In and out, the existing in-situ reaction chamber is difficult to meet the above-mentioned in-situ XRD test requirements for these systems

At present, some in-situ XRD reaction chambers have been designed at home and abroad, especially for electrochemical on-site analysis, but their structures are too complicated, and these in-situ XRD reaction chambers are limited to in-situ XRD electrochemical reaction chambers. , the function is relatively simple

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