Metallenes: Recent Advances and Opportunities in Energy Storage and Conversion Applications

Abstract

The development of advanced energy storage and conversion technology is a significant global concern, in which the innovation in materials would feature prominently for next-generation energy devices. Graphene, as a typical two-dimensional (2D) material, is acknowledged to have a significant impact on today's energy-storage/ conversion evolution. The effectuation for future energy landscape should still enlist alternative 2D materials with high electrochemical activity and energy density. As a group of 2D nanomaterials, metallene is considered as a potential candidate because of its fantastic physicochemical properties. In this Review, the structures, synthesis strategies, and properties of various metallenes are systematically introduced. The research progress and latest achievements in the energy field are reviewed, including Li-/Na-/K-ion batteries, Li−S batteries, solar cells, and typical catalytic processes (i.e., CO 2 /N 2 /O 2 reduction reaction, hydrogen/oxygen evolution reaction, etc.). Besides, the challenges of miscellaneous energy storage/conversion devices and the advantages of applications of metallenes are discussed and compared. Finally, the development prospects are provided as suggested guidelines for future researches.

Self‐Calibrated, Sensitive, and Flexible Temperature Sensor Based on 3D Chemically Modified Graphene Hydrogel

“…FE‐SEM 7600 was employed to characterize the morphologies of samples. [ 56 ] The Raman and FTIR spectra were acquired using an alpha300 R spectrophotometer (WITec) with a 514 nm and a PerkinElmer Frontier spectrometer, respectively.…”

Review and Development of Anode Electrocatalyst Carriers for Direct Methanol Fuel Cell

“…Many metal oxides such as WO 3 , SnO 2 , TiO 2 , and CeO 2 have been used as catalyst carriers and have shown excellent catalytic effects. [77][78][79][80][81][82][83] Hameed et al deposited Pd nanoparticles on different metal oxide carriers and compared them with conventional Pt/C catalysts under alkaline environment. The metal oxides as carriers increased the active specific surface area of the catalysts, which significantly reduced the agglomeration of the Pd nanoparticles, making Pd nanoparticles smaller and able to be more uniformly distributed to the carrier.…”

Divergent Paths, Same Goal: A Pair‐Electrosynthesis Tactic for Cost‐Efficient and Exclusive Formate Production by Metal–Organic‐Framework‐Derived 2D Electrocatalysts

“…[ 12–16 ] Particularly, bismuthene (Bi‐ene)–one of the newly emerging 2D metallic materials with few‐layer thickness, namely metallenes, which afford ultrahigh atomic utilization with plentiful unsaturated sites and unique electronic structures, has sparked great interest in this field due to their unusual quantum size effect and catalytic properties. [ 17–19 ] Nevertheless, seldom of them can simultaneously achieve the high current density, selectivity, and stability in a wide potential window. [ 20,21 ] Hence, further works are still imperative to explore advanced Bi‐based electrocatalysts with satisfactory performance for electroreduction of CO 2 to formate.…”