AK&M 02 November 2024 15:10
Tomsk Polytechnic University scientists have developed metal hydride hydrogen storage devices made of an alloy of titanium and iron. The cost of their production is three times lower than that of imported analogues. The accumulators are capable of sorbing and desorbing hydrogen for several thousand cycles with a loss of efficiency of no more than 5-10%.
By far the most common method of storing hydrogen is cylinders at a pressure of 150 or 350 atmospheres. However, the use of high pressure requires increased safety measures. In this regard, scientists consider the use of metal hydrides as an alternative way to accumulate and release hydrogen.
There are a large number of metal hydrides, some of them are capable of accumulating and releasing hydrogen once, others are suitable for repeated use. A team of scientists from Tomsk Polytechnic University is working towards the creation of hydrogen storage systems for reusable stationary use based on lanthanum-nickel and titanium-iron.
“The lanthanum-nickel alloy (LaNi5) is one of the most studied metal hydrides in the world for hydrogen accumulation, widely used, and, at the same time, one of the most expensive. With it, we managed to create a safe hydrogen storage system that does not require high temperatures and pressure. However, some of the raw materials for the alloy have to be purchased abroad, so TPU scientists faced the task of synthesizing metal hydrides from the domestic raw material base, — says associate professor of the Department of Experimental Physics Viktor Kudiyarov. — We have developed a laboratory hydrogen storage facility with storage devices made of titanium and iron alloy, and also created the alloy itself. The cost of such a drive is about three times lower than lanthanum and nickel-based drives.”
With the support of the federal program of the Ministry of Education and Science of the Russian Federation “Priority 2030”, equipment was purchased that allows for a full cycle of creating a storage material – from obtaining an ingot to studying the characteristics of hydrogen sorption and desorption in a laboratory installation.
Currently, scientists at Tomsk Polytechnic University are working on improving metal hydride-based storage devices. Now the drives are used in the form of fine powders, instead it is planned to create compact drives with additives to increase thermal conductivity.
“Our goal is to develop large hydrogen storage systems based on domestic raw materials, suitable for mass production,” says Andrey Leader, head of the Experimental Physics Department.
The results of the TPU scientists’ project were presented at the V All-Russian conference “Hydrogen. Technologies. The Future” in Perm.
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