This study proposes using a shellular, a micro-architectured material with a triply periodic minimal surface, as a pressure vessel for hydrogen storage in green mobility applications. The shellular's unique geometry allows it to withstand internal pressure via biaxial tensile stresses, unlike other ultralow-density materials. Through finite element analysis (FEA) and experimental validation, the researchers demonstrate that a double-chambered, cold-stretched P-surface shellular with a large number of cells significantly outperforms conventional spherical and cylindrical pressure vessels in terms of internal volume per total weight. The design offers advantages such as leak-before-break safety and flexibility in shape.

Yoon Chang Jeong, Seung Chul Han, Cheng Han Wu, Kiju Kang