New method and testing device for characterizing PCT curve of hydrogen absorption and desorption of hydrogen storage material

Abstract

The invention relates to a new method and a testing device for characterizing a PCT (percent) curve of hydrogen absorption and desorption of a hydrogen storage material. The testing device adopts the technical scheme that a high-pressure hydrogen cylinder and a high-pressure helium cylinder are connected with a filter by a reducing valve (3) and a reducing valve (4) and are connected with a valve (7) and a valve (14) by a valve (6) respectively; the valve (7) is connected with a mass flow control meter (8) and a valve (9); the valve (14) is connected with a pressure sensor (13) and a valve (12), is connected with a valve (10) in parallel, and is connected with a vacuum pump (11); a sample room (18) is connected with a filter (16) and a valve (15) and is connected with a gas circuit between the valve (14) and the valve (12) by a cross joint; a main body part of a testing system is placed in a thermostat (23); the sample room (18) is sheathed and connected with a heating jacket (19); a photoelectric isolation driver module (25) is connected with a data acquisition card (24); and the data acquisition card (24) is connected with a computer (26). With the adoption of the new method and the testing device, the defects such as errors, unbalance and low precision are overcome. The new method and the testing device are accurate and convenient to operate.

Description

technical field [0001] The invention relates to a method and equipment for detecting the performance of a hydrogen storage material, in particular to a new method and a testing device for characterizing the hydrogen absorption and desorption PCT curve of a hydrogen storage material. Background technique [0002] The massive exploitation and utilization of traditional fossil energy has led to tight energy supply and deterioration of the climate and environment. Therefore, alternative energy carrier schemes have gradually attracted attention. In this context, hydrogen has attracted much attention as an energy carrier. Although hydrogen is so far the only man-made energy carrier that can be produced in real time and meet our energy needs, the storage of hydrogen has not been satisfactorily solved. Especially for mobile applications, where the number of refills and energy efficiency are important factors to consider, the challenges are still considerable. At present, solid-sta...

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Problems solved by technology

[0004] Before the present invention, the hydrogen absorption and desorption PCT curve is mainly obtained by the Sieverts device, but the Sieverts device has the following disadvantages: (1) the error of the total hydrogen absorption is cumulative; (2) if the hydrogen absorption and desorption speed of the sample is not very fast , then it will be difficult to achieve a balance within the experimental time range; (3) the data points in the test curve are not dense enough, which is not conducive to accurately determine the platform pressure, and the increase in the density of test points will affect the test accuracy; The valve performs switching action, and the service life of the valve is short

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