High‐Energy‐Density Supercapacitors Based on Patronite/Single‐Walled Carbon Nanotubes/Reduced Graphene Oxide Hybrids

Abstract

Abstract:The facile hydrothermal synthesis of a patronite VS 4 / single-walled carbon nanotube/reduced graphene oxide hybrid is reported. Detailed electrochemical investigations of the hybrid revealed an exceptionally high energy density of ca. 174 W h/kg. A comparison of this value with those of other supercapacitor electrodes based on metal sulfides and also some with

Enhanced Kinetics over VS4 Microspheres with Multidimensional Na+ Transfer Channels for High‐Rate Na‐Ion Battery Anodes

“…Among all of the reported anode materials for SIBs, V‐based sulfides have attracted attention owing to their high reversible capacities resulting from the large Na + storage spacing and the polytropic valence of V ranging from +5 to 0 . VS 4 , as a cheap and environmentally benign mineral (Patronite), is a potential electrode material for application in SIBs, owing to its unique structural characteristics of large interchain distance (5.83 Å) caused by parallel 1 D chains, weak interaction between neighboring chains caused by weak van der Waals forces, and high content of S − caused by S 2 2− monomer . These characteristics can not only afford enough potential sites for Na + storage with the theoretical specific capacity of 1196 mAh g −1 for VS 4 +8 Na + +8 e − ⇄4 Na 2 S+V, but also contribute to Na + transfer in the chains.…”

“…[5][6][7][8][9] VS 4 ,a sacheap and environmentally benign mineral (Patronite), is ap otential electrode materialf or application in SIBs, owing to its uniques tructural characteristics of large interchaind istance (5.83 )c aused by parallel 1D chains, weak interaction between neighboring chains caused by weak van der Waals forces, and high content of S À caused by S 2 2À monomer. [10][11][12][13][14] These characteristicsc an not only afford enough potential sites for Na + storagew ith the theoretical specific capacity of 1196 mAh g À1 for VS 4 + 8Na + + 8e À Q4Na 2 S + V, [8,10,15] but also contributet oN a + transfer in the chains.…”

“…In the past few years, VS 4 has been successfully appliedt o lithium-ion batteries, [10,16,17] SIBs, [8,[18][19][20] magnesium-ion batteries, [14] aluminum-ionb atteries, [21] and supercapacitors, [13,22] and its electrochemical performances as an anode material has been explored. However,p oorly defined bulk VS 4 undergoes severe pulverization and sluggish kineticsi nduced by the anisotropy in diffusion and the insufficient electrode-electrolyte contact,w hich lead to the poor cycling stabilitya nd rate capability.…”

Synthesis of Photocorrosion‐Resistant VS4‐MoS2‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

“…VS 4 is made up of one dimensional (1D) linear chain of V 4 + (S 2 À 2 ) 2 molecules and each linear chain contains two S 2 À 2 dimers which are connected by two adjacent V atoms, with weak van der Waals bonding between the 1D chains and the inter chain distance is 5.83 Å. [23] VS 4 and its composites have been used as a catalyst for various applications such as sodium ion batteries, [24] lithium-ion batteries [25][26][27][28] supercapacitors, [29] photocatalysis, [30] hydrogenation reactions of ethylene. [31] Zhou.…”

“…13.8 kW kg À 1 , excluding this composite to be a potential as a high-energydensity supercapacitor electrode. [29] So, due to its higher catalytic activity it shows very wide application towards multiple directions.…”