Recent Development of Metallic (1T) Phase of Molybdenum Disulfide for Energy Conversion and Storage

Abstract

The development of a feasible and inexpensive strategy to obtain and utilize sustainable energy is an important issue for the sustainable development of human society. Over the past decade, significant progress has been made in the development of novel functional materials for energy conversion and storage. Owing to their unique physico‐chemical properties, 2D layered materials, such as graphene and transition metal dichalcogenides, have attracted great interest in energy‐related research. 1T‐MoS2 is a metallic phase of molybdenum disulfide (MoS2) with extraordinary electronic conductivity, enlarged interlayer spacing, and more electrochemically active sites along the basal plane, which offers intriguing benefits for energy‐related applications compared to its semiconducting counterpart (2H‐MoS2). This review summarizes the preparation and structure–property relationships of 1T‐MoS2, as well as the underlying relations between the metallic (1T) and semiconducting (2H) phases of MoS2. Recent progress in the preparation and stabilization of 1T‐MoS2 materials and their applications for energy conversion and storage are discussed, including water splitting to form hydrogen via photo/electrocatalysis and electricity storage in lithium‐ion batteries, sodium‐ion batteries, magnesium‐ion batteries, and supercapacitors. Optimization strategies of 1T‐MoS2 to obtain enhanced practical properties based on theoretical calculations are also presented.

1T′‐ReS2 Confined in 2D‐Honeycombed Carbon Nanosheets as New Anode Materials for High‐Performance Sodium‐Ion Batteries

“…Consequently, graphite, the commercial anode material of LIBs, cannot be directly used in SIBs because of suppressed electrochemical kinetics. [15][16][17][18] However the fabrication of a stable 1T-MoS 2 together with extremely weak interlayer coupling via a facile and low-cost method has not been reported.Inspiringly, ReS 2 (rhenium disulfide) is a new TMD known to exhibit both distorted 1T (1T′) phase and extremely weak interlayer van der Waals interaction. [9][10][11] MoS 2 , a typical TMD, has been widely investigated because of its layered structure with large interlayerspacing (6.15 Å) that is beneficial to insertion/extraction of Na + .…”

“…[9][10][11] MoS 2 , a typical TMD, has been widely investigated because of its layered structure with large interlayerspacing (6.15 Å) that is beneficial to insertion/extraction of Na + . [15][16][17][18] However the fabrication of a stable 1T-MoS 2 together with extremely weak interlayer coupling via a facile and low-cost method has not been reported. This results in poor electrochemical performance.…”

Hatted 1T/2H‐Phase MoS2 on Ni3S2 Nanorods for Efficient Overall Water Splitting in Alkaline Media

“…As imilar XRD pat-tern for the S-Ni@NF sample is shown in Figure S2 (Supporting Information), except for the typical MoS 2 peak, indicating that the appearanceo fM oS 2 does not interferew itht he formation of Ni 3 S 2 on the Ni foam matrix. [3] The peaks at 198, 235, 285,a nd 336 cm À1 were attributedt ot he J 1 ,J 2 ,E 1g ,a nd J 3 bands of the 1T-phase MoS 2 , [35,41,43] and the peaks at 379 and 404 cm À1 were attributed to the E 1 2g andA 1g vibrational modes, respectively, of the 2H-phase MoS 2 . [3] The peaks at 198, 235, 285,a nd 336 cm À1 were attributedt ot he J 1 ,J 2 ,E 1g ,a nd J 3 bands of the 1T-phase MoS 2 , [35,41,43] and the peaks at 379 and 404 cm À1 were attributed to the E 1 2g andA 1g vibrational modes, respectively, of the 2H-phase MoS 2 .…”

“…[35][36][37] Therefore, couplingMoS 2 with Ni 3 S 2 shouldb ea ne fficientw ay to enhance the catalytic activity.Y ang has successfully prepared MoS 2 -Ni 3 S 2 heteronanorods on Ni foam (NF) as an efficient bifunctionale lectrocatalyst for overall water splitting. [40,41] Ni 3 S 2 ,a st he metal-rich form of nickel sulfide, shows better conductivity. Nevertheless, this kind of structure is not as good as the hatted nanorods because of the relatively inadequate conductivity and the lack of the 1T-MoS 2 phase.…”

Enhanced Li‐Ion‐Storage Performance of MoS2 through Multistage Structural Design

“…[10] This inspires us to consider: whether the multistage structural design concept applicable to the folded proteins can be employed herein to create the advanced electrode materials for LIBs. [13][14][15][16] In recent years, various MoS 2 composites, [17][18][19][20][21][22][23][24][25][26][27] including MoS 2 /C, [19,20,23,24] SnS 2 /MoS 2 /CFC, [21] MoO 2 @MoS 2 [22] and S-MoS 2 @α-Fe 2 O 3 [26] have been widely exploited as important anode materials for lithium ion batteries (see Table S1). [13][14][15][16] In recent years, various MoS 2 composites, [17][18][19][20][21][22][23][24][25][26][27] including MoS 2 /C, [19,20,23,24] SnS 2 /MoS 2 /CFC, [21] MoO 2 @MoS 2 [22] and S-MoS 2 @α-Fe 2 O 3 [26] have been widely exploited as important anode materials for lithium ion batteries...…”