Metal-Ion Coupling in Metal–Organic Framework Materials Regulating the Output Performance of a Triboelectric Nanogenerator

Abstract

Metal–organic frameworks (MOFs) as friction nanopower generation materials have attracted more and more research and attention because of the inherent three-dimensional framework structure and large aperture. In this work, the ZUT-75­(Mn) with a one-dimensional pore structure was synthesized by using electron-rich benzimidazole carboxylic acid ligands, and isomorphic offspring MOF materials were obtained by single crystal–single crystal solvent-assisted metal-ion exchange. The exchange process was monitored by liquid UV–vis spectroscopy, atomic absorption spectrometry, and energy-dispersive X-ray spectroscopy. The metal–oxygen coordination energy, X-ray photoelectron spectroscopy binding energy, and hard–soft acid–base principle verified the spontaneity of the central-metal-exchange reaction. The four materials were applied to a triboelectric nanogenerator (TENG), and the output performance law of ZUT-75 was Co-MT > Zn-MT > Cu-MT > Mn-MT. Among them, the charge and power densities of Co-MT were up to 127.05 μC m–2 and 3280.50 mW m–2. When the density functional theory calculation and variable-temperature magnetic susceptibility test results were combined, it was concluded that low metal-ion-coupling degree promoted the formation and transfer of contact electrifications, which greatly improved the output performance of the TENG. This work provided a new idea for improving the output performance of the TENG.

Triboelectric Nanogenerators Assembled by Cobalt(II) Coordination Polymer Incorporated Composite Films and their Application for Self‐Powered Anticorrosion

“…Zn 2 + , Cu 2 + ), which is closely related to its unique electronic structure and shielding effect of Co 2 + . [45,46] However, it is difficult to prepare large-sized, uniform and stable pure CP films. As a result, we are inclined to combine CP with organic polymers to form composite films, which could improve film uniformity on the one hand, and on the other, modify the surface of CP simply and regularly, so that the charge density can accumulate a higher initial value in a short time and have a larger stable current in the process of contact electrification, thereby providing an improvement scheme for the general low current of TENG.…”

Application of Metal–Organic Framework in Diagnosis and Treatment of Diabetes

“…Postsynthesis modification by the metal-exchange approach can be accomplished by the charge-balanced substitution of cations present in the pores or more complex processes to form co-mixed metal MOF (MM-MOF) materials of multiple metals in a single MOF crystal [ 87 , 88 ]. Some engineered MOFs exhibit excellent luminescent properties [ 89 ], exploiting the uncoordinated oxygen atoms of the terephthalate linker present in Zn-BDCs to interact with the Ag cations in a silver nitrate (AgNO 3 ) solution, resulting in Zn-BDCs converted to Ag-BDC that exhibited a selective reaction to acetone and a strong green luminescence, with emission quantum yields as high as 22% in the solid-state (powder) form [ 56 ].…”

Cationic metal–organic framework with charge separation effect as a high output triboelectric nanogenerator material for self-powered anticorrosion

“…The porosity of the frame material during friction can generate an additional potential difference on the pore surfaces, effectively improving the TENG's output performance. 26–28 In addition, owing to the rich metal interactions and precise structural features of the metal nodes, we can study the relationship between the structures of MOF cathode materials and their frictional power-generation performance. 29–33…”