Interfacial engineering of transition metal dichalcogenide/carbon heterostructures for electrochemical energy applications

Abstract

This review provides a fundamental understanding of three types of interfacial engineering in TMDC/C heterostructures and provides guidance for designing interfacial engineering in TMDC/C heterostructures for electrochemical energy applications.

Integrating multiple regulatory strategies: phase, morphology and interface engineering to construct a hierarchical Ni2P–MoS2/rGO heterostructure catalyst for efficient oxygen reduction reaction

“…The vertical arrays of ultrathin 1T-MoS 2 nanosheets anchored on rGO is conducive to exposing rich edge active sites and improving the electron transport efficiency. Specifically, the growth mechanism of 1T-MoS 2 /rGO is as follows: 34–36 During the primary period, (NH 4 ) 6 Mo 7 O 24 as a Mo source dissociated Mo 7 O 24 6− , which was in situ adsorbed onto the GO surface because of the electrostatic attraction of oxygen-containing functional groups (such as –OH and –COOH). With the increase of the solvothermal reaction temperature, CS(NH 2 ) 2 as the S source thermally decomposed into strongly reducing H 2 S, and further reacted with Mo 7 O 24 6− absorbed on the GO surface to in situ obtain MoS 2 nanosheets.…”

“…Thus, owing to the weakened electrostatic repulsion between GO and Mo 7 O 24 6− in DMF, the interfacial interaction is enhanced, which is conducive to the vertical growth of MoS 2 nanosheets. 36 In DMF dispersant, the unique vertically oriented nanosheet arrays may provide a larger available surface area, facilitate exposure rich highly active edges, as well as enhance the electronic and ionic transfer. The morphology of 1T-MoS 2 /rGO (DMF) is further characterized by high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) (Fig.…”

Advancements in transition metal dichalcogenides (TMDCs) for self-powered photodetectors: challenges, properties, and functionalization strategies

“…A particular technique for surface functionalization of TMDCs is called covalent functionalization, which entails the creation of robust covalent connections between the functional groups and the TMDC surface. 142 The optimization of TMDCs' performance in self-powered photodetection can be achieved by covalent functionalization. Covalent functionalization enables exact control over the insertion of certain molecules or chemical groups on the TMDC surface for self-powered photodetectors based on TMDCs.…”

Regulating Metal Centers of MOF-74 Promotes PEO-Based Electrolytes for All-Solid-State Lithium-Metal Batteries

“…4−7 Furthermore, an adverse chemical reaction between the lithium metal and electrolytes not only results in the consumption of electrolytes but also reduces both the Coulombic efficiency and cycle life of the batteries. 8,9 Allsolid-state lithium-metal batteries (ASSLMBs) with strong security and high theoretical energy density are considered as an effective measure to solve the frequent security accidents of liquid lithium-ion batteries, and the energy density can be significantly improved. 10,11 The solid−solid interface between electrolytes and electrodes can mitigate side reactions well when the solid electrolytes replace the flammable separators and ether electrolytes.…”

“…Lithium metal is considered as one of the most promising anode materials on account of its large theoretical capacity (3860 mAh g –1 ) and low redox potential (−3.04 V vs standard hydrogen electrode). − Nevertheless, uneven Li-ion deposition on the surface of lithium metal results in the formation of dead Li and uncontrollable Li-dendrites, which may puncture the separator and then lead to short-circuit, presenting a serious safety hazard. − Furthermore, an adverse chemical reaction between the lithium metal and electrolytes not only results in the consumption of electrolytes but also reduces both the Coulombic efficiency and cycle life of the batteries. , All-solid-state lithium-metal batteries (ASSLMBs) with strong security and high theoretical energy density are considered as an effective measure to solve the frequent security accidents of liquid lithium-ion batteries, and the energy density can be significantly improved. , The solid–solid interface between electrolytes and electrodes can mitigate side reactions well when the solid electrolytes replace the flammable separators and ether electrolytes. , …”