Magnesium is expected to help the development of fuel vehicles

Fuel cell vehicles are one of the main routes of new energy vehicles. "National Innovation-driven Development Strategy Outline" and "Thirteenth Five-Year" National Strategic Emerging Industry Development Plan, etc. have all promoted the development of hydrogen energy and fuel cell technology innovation to national strategies. The height is listed as the key development direction. However, the current industrialization process of fuel vehicles is obviously later than that of pure electric vehicles. The reason is that the bottleneck of its industrial chain is mainly that hydrogen storage technology still faces major challenges.

Recently, Ding Wenjiang, academician of the Chinese Academy of Engineering and director of the Hydrogen Science Center of Shanghai Jiaotong University, attended the "2019 New Energy Vehicle Industry Development Summit Forum" hosted by the Shanghai Songjiang District Investment Promotion Service Center and hosted by Ringier Industrial Media. Magnesium is very Good hydrogen storage materials are expected to achieve high-capacity, safe and convenient hydrogen storage and transportation, thereby helping the development of fuel vehicles.

It is understood that at present, there are three main ways to store hydrogen in gaseous state, liquid state and solid state. Among them, high-pressure gaseous hydrogen storage is the most widely used, but there are problems such as low efficiency and high cost.

Ding Wenjiang said that magnesium as a functional material is an excellent choice for solid hydrogen storage materials. Magnesium-based solid hydrogen storage materials are not only high in hydrogen storage but also safe. He introduced that the hydrogen storage density of magnesium can reach 7.6 wt.%, Exceeding the ultimate goal of the vehicle-mounted hydrogen source system proposed by the US Department of Energy, and the experimental results show that there is no significant attenuation after 2,500 cycles. Magnesium-based solid-state hydrogen storage materials have a higher hydrogen production by hydrolysis, which can reach 15.2wt.%, Which is equivalent to three times that of liquid hydrogen storage. At the same time, magnesium-based solid hydrogen storage materials also have obvious cost advantages. The unit hydrogen storage and transportation cost can be reduced by 40%, by 6.48 yuan / kg.

In addition, due to the characteristics of magnesium materials, it can also realize the integration of industrial by-product hydrogen purification, storage and transportation. It has the advantages of direct filling and purification of hydrogen, storage and transportation, and lower cost. It can realize large-capacity solid-state hydrogen storage and can be loaded on a bicycle. A hydrogen storage tank and 1.2 tons of hydrogen can be transported at normal temperature and pressure, so as to achieve more pure hydrogen, longer distance, lower price and higher safety.

Hydrogen refueling station is one of the necessary prerequisites for the development of hydrogen fuel cell vehicles. According to the "Blue Book of China's Hydrogen Energy Industry Infrastructure Development (2016)", China will have 100 hydrogen refueling stations by 2020 and 1,000 by 2030. The data shows that as of 2018, the number of possessions is 23, which is much lower than that in Europe, the United States and Japan. This is largely due to the problems of high cost and long investment return period for the construction of a single domestic hydrogen refueling station.

Ding Wenjiang introduced that two magnesium-based solid-state hydrogen storage and transportation vehicles can load 2.4 tons of hydrogen, which can be directly converted into hydrogen refueling stations to hydrogenate 3,000 heavy trucks. This new type of hydrogen refueling station has the advantages of small footprint, many hydrogenation vehicles, low hydrogen cost, and large hydrogen refueling capacity, and it has a promising development prospect.

In terms of industrialization progress, Ding Wenjiang revealed that a production line with an annual output of 20 to 50 tons of magnesium hydrogen storage materials has been constructed in Shanghai ’s Lingang District, which is also the world ’s first production line to produce magnesium hydrogen materials at ton levels. .