Achieving Superior Tensile Performance in Individual Metal−Organic Framework Crystals

Abstract

Rapid advances in the engineering application prospects of metal−organic framework (MOF) materials necessitate an urgent in‐depth understanding of their mechanical properties. This work demonstrates unprecedented recoverable elastic deformation of Ni‐tetraphenylporphyrins (Ni‐TCPP) MOF nanobelts with a tensile strain as high as 14%, and a projected yield strength‐to‐Young's modulus ratio exceeding the theoretical limit (≈10%) for crystalline materials. Based on first‐principles simulations, the observed behavior of MOF crystal can be attributed to the mechanical deformation induced conformation transition and the formation of helical configuration of dislocations under high stresses, arising from their organic ligand building blocks in the crystal structures. The investigations of the mechanical properties along with electromechanical properties demonstrate that MOF materials have exciting application potential for biomechanics integrated systems, flexible electronics, and nanoelectromechanical devices.

Titanium-containing high entropy oxide (Ti-HEO): A redox expediting electrocatalyst towards lithium polysulfides for high performance Li-S batteries

“…Herein, titanium-containing high entropy oxides (Ti-HEO) with enhanced electrical conductivity are fabricated by same facile synthesis technique of low-temperature calcination of metal organic framework (MOF) templates which has been successfully applied for the formulation of HEO (Ni 0.2 Co 0.2 Cu 0.2 Mg 0.2 Zn 0.2 )O (HEO850) in our previous work [42,43]. The Ti-HEO/S/KB cathode outperforms HEO850/S/KB [42] particularly at high sulfur loadings due to its superior catalytic conversion properties over LPS and increased electrical conductivities.…”