V₂O₅/NaV₆O₁₅ nanocomposites synthesized by molten salt method as a high-performances cathode material for aqueous zinc-ion batteries

Abstract

Aqueous zinc-ion batteries (ZIBs) is a potential energy storage system due to its advantages of low cost, good safety, and high theoretical capacity (820 mAh g-1). However, the lack of cathode materials with long cycle stability severely restricts the development of ZIBs. In this paper, V2O5/ NaV6O15 nanocomposites are synthesized by molten salt method in one step and used as cathode material for ZIBs, which have good electrochemical performances. The specific capacity of the materials remain 160 mAh g-1 when the current density is 0.5 A g-1 after 1000 cycles, and the capacity retention rate is 102.03% when the current density is 5 A g-1 for 1000 cycles. This is mainly due to the large number of active sites generated by crystal defects and the synergistic interaction between the dual-phase materials, which reduces the stress of ions inserted/extracted during the Zn2+ storage process and improves the electrochemical performance.

Recovery of vanadium and nickel from heavy oil fly ash (HOFA): a critical review

“…65 NH 4 VO 3 can be directly processed to fabricate NaV 6 O 15 , which is investigated as a high-performance cathode in lithium ion batteries, sodium ion batteries, and zinc ion batteries. 66–68…”

“…Also, an increasing the amount of NH 4 Cl induces the precipitation of NH 4 VO 3 and decreases its solubility 65. NH 4 VO 3 can be directly processed to fabricate NaV 6 O 15 , which is investigated as a high-performance cathode in lithium ion batteries, sodium ion batteries, and zinc ion batteries [66][67][68].…”

Synergistic Effect of Composite V2O5/Ca0.17V2O5 Film Electrodes as High-Performance Cathodes of SIBs

“…Niu et al also prepared three-dimensional 3D V 2 O 5 /NaV 6 O 15 hierarchical heterostructures, which exhibited the best electrochemical performance compared with pure V 2 O 5 and V 2 O 5 /NaV 6 O 15 physical mixture . Ran et al obtained high performance V 2 O 5 /NaV 6 O 15 nanocomposites, whose capacity retention rate was 102.03% when the current density was 5 A g –1 for 1000 cycles . Lashari, Luo et al also improved performance by synthesizing composite materials. , Hence, it is a promising route to design and fabricate composite materials with a synergistic effect to achieve both high capacity and stable cyclic ability.…”

“…Liu , whose capacity retention rate was 102.03% when the current density was 5 A g −1 for 1000 cycles. 33 Lashari, Luo et al also improved performance by synthesizing composite materials. 34,35 Hence, it is a promising route to design and fabricate composite materials with a synergistic effect to achieve both high capacity and stable cyclic ability.…”