Remarkably improved hydrogen storage properties of NaAlH4 doped with 2D titanium carbide

Development of Catalyst‐Enhanced Sodium Alanate as an Advanced Hydrogen‐Storage Material for Mobile Applications

“…The catalytic functions of TiC‐, TiN‐, TiB 2 ‐, and Ti‐based metal–organic frameworks (MOFs) have also been studied and evaluated . Xiao et al.…”

“…X‐ray diffraction (XRD) analysis indicates that TiC retains its original phase structure after different de/hydrogenation cycles. Recently, a novel 2 D titanium carbide, Ti 3 C 2 , obtained by selective etching of the Al element from the Ti 3 AlC 2 MAX phase by using aqueous HF, has been introduced into NaAlH 4 . Approximately 4.7 wt % hydrogen is released from the 7 wt % Ti 3 C 2 ‐NaAlH 4 sample within 100 min at 140 °C, and the dehydrogenated sample absorbs 4.6 wt % hydrogen within 60 min at 120 °C; by contrast, dehydrogenated pristine NaAlH 4 absorbs only 0.4 wt % hydrogen under otherwise identical conditions.…”

MXene‐Based Composites: Synthesis and Applications in Rechargeable Batteries and Supercapacitors

“…In addition to metals, carbon-based materials, metal oxides, metal sulfides, and polymers, many other materials have been used to compound with MXene, such as metal-organic frameworks, [223] metal organics, [224,225] metal hydrides, [226,227] sulfur, [228] glass fibers, [229] graphene-like carbon nitride (g-C 3 N 4 ), [230] etc.…”

“…Because both surfaces of the Ti 3 C 2 T x and g-C 3 N 4 carry different potential, they do not aggregate or precipitate, but form a stable colloidal solution. [226,227] Lin et al filtered a Ti 3 C 2 T x suspension through a glass fiber (GF) membrane to form a Ti 3 C 2 T x /GF membrane, which acts as a separator for lithium-sulfur batteries. Moreover, the hydrophilic or oxygen-terminated groups are firmly attached to the surface of the composite giving it a contact angle of 14.1°, which is an advantageous reserve of transformational energy in inorganic electrolyte.…”

“…Moreover, the hydrophilic or oxygen-terminated groups are firmly attached to the surface of the composite giving it a contact angle of 14.1°, which is an advantageous reserve of transformational energy in inorganic electrolyte. [228] In summary, in addition to metals, carbon-based materials, metal oxides, metal sulfides, and polymers, many other materials have been used to compound with MXene, such as metal-organic frameworks, [223] metal organics, [224,225] metal hydrides, [226,227] sulfur, [228] glass fibers, [229] graphene-like carbon nitride (g-C 3 N 4 ), [230] etc., in rechargeable batteries system and have shown remarkable electrical performance. [232] Both MgH 2 and NaAlH 4 have a reversible hydrogen storage property, so Liu et al and Wu et al combined Ti 3 C 2 T x with these metal hydrides by ball milling to obtain a composite material with excellent hydrogen storage properties.…”