Chevrel Phase Mo₆T₈ (T = S, Se) as Electrodes for Advanced Energy Storage

Abstract

With the large-scale applications of electric vehicles in recent years, future batteries are required to be higher in power and possess higher energy densities, be more environmental friendly, and have longer cycling life, lower cost, and greater safety than current batteries. Therefore, to develop alternative electrode materials for advanced batteries is an important research direction. Recently, the Chevrel phase Mo T (T = S, Se) has attracted increasing attention as electrode candidate for advanced batteries, including monovalent (e.g., lithium and sodium) and multivalent (e.g., magnesium, zinc and aluminum) ion batteries. Benefiting from its unique open crystal structure, the Chevrel phase Mo T cannot only ensure rapid ion transport, but also retain the structure stability during electrochemical reactions. Although the history of the research on Mo T as electrodes for advanced batteries is short, there has been significant progress on the design and fabrication of Mo T for various advanced batteries as above mentioned. An overview of the recent progress on Mo T electrodes applied in advanced batteries is provided, including synthesis methods and diverse structures for Mo T , and electrochemical mechanism and performance of Mo T . Additionally, a briefly conclusion on the significant progress, obvious drawbacks, emerging challenges and some perspectives on the research of Mo T for advanced batteries in the near future is provided.

Emerging Nonaqueous Aluminum‐Ion Batteries: Challenges, Status, and Perspectives

“…In addition to chloroaluminate anions, Al cations can also be deintercalated by certain types of materials. Vanadium oxide (V 2 O 5 , VO 2 , Li 3 VO 4 , Mo 2.48 VO 9.93 ), Chevrel phase (Mo 6 S 8 ), layered disulfide (TiS 2 ), and even cubic sulfide (CuTi 2 S 4 ) contain sites where Al 3+ can intercalate into these lattices, and the proposed reactions can be summarized as followswhere M represents the cathode materials, and the specific reactions in each type of material are presented in Figure .…”

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

“…4,5 These ionic liquid based Al batteries are proposed to work in two distinctive reversible energy storage mechanisms depending upon the applicability of the cathode materials, one is intercalation reaction and another is conversion reaction. As the chloroaluminate ionic liquid electrolyte consists of Al ion in the form of both cation and anions, so both Al 3+ and AlCl 4can undergo intercalation in rocking chair type Al batteries [6][7][8][9][10][11][12][13][14][15][16] and Al dual-ion batteries, [17][18][19][20][21][22][23][24][25][26][27][28][29][30] respectively. The rocking chair Al batteries are reported to furnish high capacity (~300 mAh/g) but are limited by their small cycle life (<20 cycles), coulombic efficiency and cell voltage range (~0.6 V), whereas Al dual-ion batteries can deliver higher voltage (~2.0 V) with fast charge/discharge rates, but have low storage capacity (<120 mAh/g) and involve large volume expansion due to the involvement of large sized anion, 31 which can cause irreversible damage to the battery.…”

A Salt‐Templated Strategy toward Hollow Iron Selenides‐Graphitic Carbon Composite Microspheres with Interconnected Multicavities as High‐Performance Anode Materials for Sodium‐Ion Batteries

“…Recently, transition‐metal selenides have attracted much attention as promising anode materials for SIBs by virtue of their high capacity (attributed to the conversion reaction with Na + ), chemical stability, and low environmental impact . All these characteristics make them promising materials for SIBs.…”