A copper tetrathiovanadate anode for ultra-stable potassium-ion storage

Abstract

Copper tetrathiovanadate (Cu3VS4) nanoparticles uniformly loaded in carbon nanofibers (CVS/CNF) are designed as a novel anode for potassium-ion batteries through electrospinning and subsequent carbonization/sulfidation treatment.

Anchoring Metal‐Organic Framework‐Derived ZnTe@C onto Elastic Ti3C2Tx MXene with 0D/2D Dual Confinement for Ultrastable Potassium‐Ion Storage

“…We also compared the long-term cycling performance of ZCT with other reported transition metal chalcogenides-based anode materials at a fixed current density of 1.0 A g −1 , as Figure 2e shows. [10][11][12][13][14][15][16][17]19] Our ZCT exhibited the highest specific capacity and the most extended cycle number, demonstrating its excellent cyclability. In addition, all the cyclability results implied the significant synergistic effect between ZC and Ti 3 C 2 T x .…”

“…[7,8] In this circumstance, developing advanced KIB anode materials with high capacity and favorable K + diffusion remains a significant challenge. Recently, transition metal dichalcogenides, such as oxides, [9] sulfides, [10][11][12][13][14][15] selenides, [16,17] and tellurides, [18][19][20][21][22] have been proposed for K + storage because they have high theoretical capacities. Compared to the oxide, sulfide, and selenide counterparts, transition metal tellurides (TMTs) exhibit several appealing advantages: higher conductivity for quick electron mobility, larger lattice spacings for enhanced K + diffusion, higher density for improved volumetric capacities, and metallic thermal conductivity for adequate joule heat transport during cycling.…”

Size-Controlled Cu3VSe4 Nanocrystals as Cathode Material in Platinum-Free Dye-Sensitized Solar Cells

“…Recently, a class of ternary copper chalcogenides, known as sulvanites (due to the parent compound, the sulvanite mineral Cu 3 VS 4 ), has emerged and gained attention in the field of optoelectronics and energy storage due to its unique crystal structure, optical, and electronic properties. , The compounds in this class, with the general formula Cu 3 MX 4 (MV, Nb, or Ta; XS, Se, or Te), possess band gaps ranging from 1.3 to 2.8 eV (depending on the chemical composition) within the range of interest for optoelectronics; in addition, several sulvanite compounds exhibit p -type conductivity, with high carrier mobility. , As a result, the sulvanite compounds have been used in various fields such as photovoltaics, hydrogen evolution catalysis, laser protection, and various battery technologies (sodium-ion, potassium-ion, and lithium-ion). − In addition to their electronic properties, sulvanites containing Cu and V benefit from the Earth abundance of these elements, making them sustainable.…”