Synergy Effect of High-Stability of VS4 Nanorods for Sodium Ion Battery

Abstract

Sodium-ion batteries (SIBs) have attracted increasing interest as promising candidates for large-scale energy storage due to their low cost, natural abundance and similar chemical intercalation mechanism with lithium-ion batteries. However, achieving superior rate capability and long-life for SIBs remains a major challenge owing to the limitation of favorable anode materials selection. Herein, an elegant one-step solvothermal method was used to synthesize VS4 nanorods and VS4 nanorods/reduced graphene oxide (RGO) nanocomposites. The effects of ethylene carbonate/diethyl carbonate(EC/DEC), ethylene carbonate/dimethyl carbonate(EC/DMC), and tetraethylene glycol dimethyl ether (TEGDME) electrolytes on the electrochemical properties of VS4 nanorods were investigated. The VS4 nanorods electrodes exhibit high specific capacity in EC/DMC electrolytes. A theoretical calculation confirms the advance of EC/DMC electrolytes for VS4 nanorods. Significantly, the discharge capacity of VS4/RGO nanocomposites remains 100 mAh/g after 2000 cycles at a large current density of 2 A/g, indicating their excellent cycling stability. The nanocomposites can improve the electronic conductivity and reduce the Na+ diffusion energy barrier, thereby effectively improving the sodium storage performance of the hybrid material. This work offers great potential for exploring promising anode materials for electrochemical applications.

V3S4/PPy nanocomposites with superior high-rate capability as sodium-ion battery anodes

“…[1][2][3][4][5][6] Sodium-ion batteries (SIBs), with the advantages of low cost, resource abundance and an analogical operating mechanism to that of lithium-ion batteries (LIBs), are considered as a promising alternative to LIBs for large-scale energy storage applications. [7][8][9][10][11] However, the sluggish diffusion kinetics and severe volume variation of anode materials cause inferior rate performance, degraded capacity and poor cycle stability of SIBs because of the larger radius of sodium ions (1.02 Å versus 0.76 Å of Li). [12][13][14][15][16][17] Therefore, exploring advanced anode materials that can reversibly store sodium ions is the key to developing SIBs.…”

Rational Conversion of V2CTx MXene into VS4-Carbon Composites as Superior Anode Materials for High-Rate and Durable Potassium/Sodium Storage

“…Moreover, the sodium storage performance of the V 2 CT x -derived hollow VS 4 /C/rGO was also verified as an SIB anode. Seen from the CV curves under 0.2 mV/s in Figure a, several redox pairs were observed within the range of 1.0 and 2.8 V, assigning to the Na + insertion into the interlayer of VS 4 to form Na x VS 4 and its further reduction to generate metallic V and Na 2 S in the cathodic scan, as well as their reverse desodiation process, during the anodic process. − In Figure b,c, hollow VS 4 /C/rGO provided a primary charge capacity of 754 mA h/g at 0.1 A/g and sustained a value of 432 mA h/g after 100 cycles. Excellent rate behavior was observed in Figure d,e, from which hollow VS 4 /C/rGO delivered high capacities of 96, 556, 510, 476, 432, and 352 mA h/g at various rates of 1.0, 2.0, 4.0, 6.0, 10, and 20 A/g, surpassing the rate capacities of hollow VS 4 /C without rGO.…”

Research Progress on Vanadium Sulfide Anode Materials for Sodium and Potassium‐Ion Batteries

“…For instance, Chen et al and Li et al also anchored VS 4 nanorods onto graphene to obtain composite materials, which exhibited excellent sodium storage performance in SIB. [121,122] For instance, Chen et al successfully prepared VS 4 nanorods with an average diameter of 30 nm through a fast and simple one pot solvothermal process. In order to further improve the conductivity and electron transfer performance of VS 4 materials, small VS 4 nanorods were uniformly anchored in the conductive network of large-sized RGO nanosheets to obtain VS 4 /RGO nanocomposites.…”

“…also anchored VS 4 nanorods onto graphene to obtain composite materials, which exhibited excellent sodium storage performance in SIB. [ 121,122 ] For instance, Chen et al. successfully prepared VS 4 nanorods with an average diameter of 30 nm through a fast and simple one pot solvothermal process.…”