Inside Cover: Synthesis of Carbon/Sulfur Nanolaminates by Electrochemical Extraction of Titanium from Ti₂SC (Angew. Chem. Int. Ed. 16/2015)

Abstract

An electrochemical method … …has been developed to selectively extract Ti from the MAX phase Ti2SC to give C/S nanolaminates composed predominantly of amorphous and some graphene-like nanoflakes.Int heir Communication on page 4810 ff., Y. Gogotsi et al. demonstrate the C/S nanolaminates to be promising cathode candidates for Li/S batteries.T hey also show that it is possible to electrochemically selectively extract Ti from an umber of other MAX phases to create anew class of "A X" phases,most of which should be nanolayered.

Synergistic Overview and Perspectives of Two-Dimensional Heterostructures for Cathodes and Separators in Flexible Li–S Batteries

“…Different types of 2D materials, such as graphene and its derivatives, − transition metal oxides (TMOs), − dichalcogenides (TMDs), − carbides and carbonitrides (MXenes), − black phosphorus, and hexagonal boron nitride (HBN), have been investigated recently in lithium sulfur batteries. Since 2D materials are atomically stacked, they often display superior electrical, optical, and mechanical characteristics that show considerable promise for use in both basic research and practical applications. − In lithium–sulfur battery cathode and separator applications, 2D hybrid material electrodes demonstrated intrinsic value. The electron transfer of isolated sulfur and Li 2 S was enhanced by using the high electric conductivity of 2D materials like graphene and MXenes (Ti 3 C 2 X, where X = F, OH) and the abundant functional groups of hydroxyls, pyridine nitrogen, and pyrrole nitrogen on 2D materials.…”