Hydrogen storage material hydrogen absorption and desorption cycle life testing device and method

Abstract

The invention discloses a hydrogen storage material hydrogen absorption and desorption cycle life testing device and method. The testing method comprises a sample pretreatment process, a hydrogen absorption capacity testing process, a hydrogen desorption capacity testing process and a direct cycle charging and discharging testing process, setting and adjustment of experimental parameters by using automatic control software based on LabVIEW, acquisition of pressure and temperature data, calculation of hydrogen absorption and desorption amount, display and storage of hydrogen absorption and desorption capacity curve data, display and storage of life curve data and display and storage of capacity retention curve data. According to the invention, the testing device required by the method is simple in structure, reliable in program operation and simple and efficient in process, the testing time can be remarkably shortened on the premise that the testing effect is not affected, and the generated data volume is reduced by 70% or above.

Description

technical field [0001] The invention belongs to the technical field of hydrogen storage, and in particular relates to a hydrogen storage material hydrogen absorption and desorption cycle life testing device and a testing method thereof. Background technique [0002] Hydrogen energy is a clean and efficient new renewable energy source with a wide range of sources. The active development of hydrogen energy technology will promote the benign transformation of the energy society and reduce carbon dioxide emissions. Solid-state hydrogen storage technology has the advantages of high hydrogen storage density, high safety, and mature preparation technology, and has been widely valued by people. The key material of solid-state hydrogen storage technology is hydrogen storage material. Among them, the long-term hydrogen absorption and desorption cycle life of hydrogen storage materials is a key indicator to evaluate whether they have commercial application value. [0003] my country'...

AI Technical Summary

Problems solved by technology

For some low plateau pressure or low-temperature hydrogen storage materials, the cycle life test cannot be completed, resulting in a significant limitation of the application area

[0004] The test method of the tester requires the helium expansion method to calibrate the volume of the sample. On the one hand, it takes a lot of time, and on the other hand, the actual volume calibration error is relatively large due to various influences; it requires a high-pressure pressure relief valve and a high-pressure flow rate. The control valve limits the inflow rate of hydrogen gas to avoid hydrogen overfilling; the flow control valve is required to limit the outflow rate of hydrogen gas, which will either cause the outflow rate of initial high-pressure hydrogen gas to be too fast, or cause the outflow rate of low-pressure hydrogen gas to be too slow in the later stage, which will affect the control effect Or test efficiency; according to the actual test process, the temperature and pressure test sensors of each part are not reasonably arranged, and only one pressure sensor is used, resulting in a large error in the hydrogen absorption and desorption capacity data, which affects the accuracy of the measured life curve; Continuous capacity testing is required throughout the life testing process, resulting in low testing efficiency, and the generated data is too large to occupy a large amount of hard disk space

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