Lithium-boron-nitrogen-hydrogen hydrogen storage material

Abstract

The invention discloses a lithium-boron-nitrogen-hydrogen hydrogen storage material, which has a component of LiaBNbHc-xM(OH)n, wherein M is a metal element in transition group, a is not more than 4 and not less than 2, b is not more than 3 and not less than 1, c is not more than 10 and not less than 6, x equals to 0.01-0.2, and n is the valence state of M. When air is isolated, the mixture of metal hydroxides M(OH)n, LiBH4 and LiNH2 is put in a stainless steel pot. In the condition of vacuum, inert atmosphere and hydrogen atmosphere, the mixture is evenly mixed by using a mechanical mixing method. The lithium-boron-nitrogen-hydrogen hydrogen storage material has over 8 percent by weight of hydrogen storage capacity, low hydrogen release temperature (the initial hydrogen release temperature is about 70 DEG C) and fast hydrogen release speed (over 9.0 percent by weight of hydrogen can be released within 30 min at the temperature of 190 DEG C) and is a hydrogen storage material with goodperformance.

Description

A lithium boron nitrogen hydrogen storage material technical field The invention relates to a hydrogen storage material for a fuel cell, in particular to a lithium boron nitrogen hydrogen storage material. Background technique With the development of technology and economy, people's demand for energy is increasing day by day, leading to the depletion of traditional energy sources such as oil, and the energy crisis is becoming increasingly severe. On the other hand, environmental pollution caused by traditional fossil fuels is increasingly threatening people's lives, and the emission of greenhouse gases and the formation of acid rain are all closely related to it. The development of green alternative fuels can not only solve energy problems, but also reduce environmental pollution. Hydrogen is regarded as the most ideal energy carrier in the future due to its high efficiency, cleanness and non-pollution, and ease of production and transportation. The use of hydrogen as a ...

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Problems solved by technology

However, the dehydrogenation temperature of the lithium-boron-nitrogen-hydrogen composite hydrogen storage materials currently developed is generally high, the hydrogen desorption starting temperature is above 200°C, and the hydrogen desorption rate is slow, which is difficult to meet the requirements of practical applications.

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