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FM: Fachverband Funktionsmaterialien

FM 2: Energy Materials

FM 2.1: Vortrag

Montag, 9. März 2026, 09:30–09:45, BEY/0138

Fundementals of elctrochemical hydrogen charging of MAX phases and their storage potential — •Rebeca Miyar, Adam C. Miles, Manoj Prabhakar, Lilian Vogl, Gerhard Dehm, Yug Joshi, Barak Ratzker, and Maria Jazmin Duarte — Max Planck institute for Sustainable Materials, Düsseldorf, Germany

Hydrogen storage remains a central challenge in the transition to renewable energy systems, as current technologies face limitations in scalability, safety, and efficiency. MAX phases, a class of nanolaminated carbides and nitrides composed of an early transition metal, an A-group element, and carbon or nitrogen, are perspective candidates for solid-state hydrogen storage due to their layered structure, which provides potential interstitial trapping sites. Although many theoretical studies discuss their hydrogen trapping behaviour, experimental evidence remains limited and previous work has focused only on gas-phase hydrogenation. Here, we present the first systematic study of electrochemical hydrogen charging and desorption in Ti2AlC and Ti3AlC2, which differ in their metal/ceramic layer ratio. Hydrogen trapping and release were analysed using thermal desorption spectroscopy, Kelvin probe measurements, and electrochemical methods. Two dominant trap types were identified in both materials, with their relative contributions reflecting the layer ratio. These results provide new insight into hydrogen permeation and trapping in MAX phases.

Keywords: Hydrogen storage; Nanolaminated materials; Thermal desorption analysis; Hydrogen trapping