Interlayer Nanoarchitectonics of Two‐Dimensional Transition‐Metal Dichalcogenides Nanosheets for Energy Storage and Conversion Applications

Abstract

Lamellar transition‐metal dichalcogenides (MX2) have promising applications in electrochemical energy storage and conversion devices due to their two‐dimensional structure, ultrathin thickness, large interlayer distance, tunable bandgap, and transformable phase nature. Interlayer engineering of MX2 nanosheets with large specific surface area can modulate their electronic structures and interlayer distance as well as the intercalated foreign species, which is important for optimizing their performance in different devices. In this review, a summary on recent progress of MX2 nanosheets and the significance of their interlayer engineering is presented firstly. Synthesis of interlayer‐expanded MX2 nanosheets with various strategies is then discussed in detail. Emphasis is focused on their applications in rechargeable batteries, pseudocapacitors, hydrogen evolution reaction (HER) catalysis and treatments of environmental contaminants, demonstrating the importance of interlayer engineering on controlling performance of MX2. The current challenges of the interlayer‐expanded MX2 and outlooks for further advances are finally discussed.

Facile Synthesis of Ultra‐Small Few‐Layer Nanostructured MoSe2 Embedded on N, P Co‐Doped Bio‐Carbon for High‐Performance Half/Full Sodium‐Ion and Potassium‐Ion Batteries

“…In recent years, transitionm etal dichalcogenides (TMDs) have been broadly exploreda sp romisinga node candidates for energy storage devices owing to their admirable rate capability and widespreada vailability. [30][31][32][33][34][35][36][37][38][39][40] Particularly,a sat ypical TMD,m olybdenum diselenide( MoSe 2 )h as al ayered sandwich structure (Se-Mo-Se) with an interlayer distance of 0.65 nm, whichi sn otably larger than that of graphite (0.335nm), and possesses ar elatively high theoretical capacity of 422 mAh g À1 , making MoSe 2 stand out in the vast range of anode materials. [41][42][43][44][45] However,t he weak van der Waals interactionb etween adjacent Se-Mo-Se layers,high surfaceenergy of 2D layers, and inherently low electronic conductivity of bulk MoSe 2 give rise to aggregation of MoSe 2 layers easily and immense volume expansion/contraction, which makes it difficult to function as SIB/PIB electrode materials with satisfactory performance.…”

Recent Advances of Two‐Dimensional Nanomaterials for Electrochemical Capacitors

“…TMDCs, consisting of graphene-like MX 2 sheets( in which M can be anym etal ions of Groups IV,V ,a nd VI;a nd Xc an be S, Se, and Te elements [28,54,55] )d isplay high electrical conductivity, large surfacea reas, and multivalent oxidation states of transition-metal ions, making them viable for electrode materials of ECs. To date, severalt echniques have been developed for the preparation of TMDCn anosheets, such as CVD growth, chemical exfoliation, and liquid-phases ynthesis.…”

Hierarchical Tubular‐Structured MoSe2 Nanosheets/N‐Doped Carbon Nanocomposite with Enhanced Sodium Storage Properties

“…[6][7][8] Var-ious strategies have been proposed to address these issues. [4,[9][10][11] The incorporation of MoSe 2 into conductive carbon materials has been demonstrated as an effective method to address the aforementioned disadvantages; [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26] this enhances the electrical conductivity and inhibits volumec hange of the electrode materials and stackingb etween interlayers. In addition, the introduction of nitrogen into the carbon materialc an modulate the electronic structure and increase chemical activity,w hich can further enhancet he sodium storage properties of the electrode materials.…”