The best hydrogen energy storage currently

How can hydrogen be stored?

Hydrogen can be stored in a variety of physical and chemical methods. Each storage technique has its own advantages and disadvantages. It is the subject of this study to review the hydrogen storage strategies and to survey the recent developments in the field. 1. Introduction

What is hydrogen energy storage?

Hydrogen energy storage utilizes electrolytic cells and fuel cells for the conversion between electricity and hydrogen energy. For hydrogen production, the proton exchange membrane electrolysis cell (PEMEC) is renowned for its high electrolysis efficiency (58 %–70 % ) and economic advantages .

Which method of hydrogen storage is most widely used?

The most widely used method of hydrogen storage is the compressed hydrogen at high pressure [2, 3]. The compression of hydrogen is not only a well-developed technology [2, , , , ], but it also offers high rates of hydrogen filling and release . Additionally, no energy is used for the release of hydrogen [8, 9].

Why do we need a large storage system for hydrogen?

application impractical. Hydrogen is frequently liquefied or compacted to improve its density since it has a low volumetric energy density (0.0899 kg/m 3) under atmospheric circumstances. However, these technologies have enormous prices, and safety concerns, and call for large storage systems.

What are the requirements for hydrogen storage?

A storage method that gives both a high gravimetric energy density and a high volumetric energy density is, therefore, a requirement. Additionally, moderate operating conditions, low enthalpy change, and fast kinetics of the hydrogen storage and release are the requirements. Safety, low cost, and public acceptance are the other important factors.

What is liquid hydrogen storage?

Similar to compression of hydrogen, liquid hydrogen storage is a well-established technology . Liquefied hydrogen offers high rates of hydrogen release similar to compressed hydrogen and low adiabatic expansion energy at cryogenic condition [13, 27, 28].