Abstract :
[en] Batteries have become indispensable in tackling global warming and energy security. Rechargeable Li-ion battery technology (LIBs), by having the highest energy density of any such device, is considered as the battery of choice for electric vehicles and large-scale smart grids. However, Li-ion batteries cannot stand alone to fulfill all future needs. The current status of the Li-ion batteries market is very tense because the manufacturers need to secure their future supply in cobalt and lithium, which are critical components in the commercial Li-ion batteries. The development of energy storage therefore requires new battery technologies based on more abundant, cheap and more accessible materials with a lowest environmental impact. Therefore, it is urgent to develop new sustainable energy storage devices with high safety, lower cost and high energy density to realize mobiles and large-scale applications. Indeed, over the years, there have been many attempts to replace lithium mainly in the stationary energy storage sector. As alternatives, battery chemistries based on more abundant elements (e.g., Na, K, Zn, Mg, Al) have received extensive attention.
Aqueous Zn-ion battery is recently attracted an increasing attention and is considered as a sustainable, safe, low cost and ecological alternative to the lithium-ion battery. Indeed, Zn-ion battery is expected to become part of the best mix of technologies that will meet the challenges of energy storage in a future. Only a few cathode materials have been investigated as suitable hosts for divalent ion Zn2+: manganese-based, vanadium-based, prussian blue analogs, and more recently organic materials [1-2]. As the cathode is currently the limiting component of Zn-ion battery (using metallic zinc as the anode material and aqueous electrolytes) and due to high theoretical capacity of vanadium pentoxide (V₂O₅) [3]. In this work, the optimization of the V2O5 cathode material for Zn-ion batteries is reported. Different strategies were used to further stabilize its electrochemical performance.
References:
[1] D. Selvakumaran, A. Pan, S. Liang, and G. Cao, J. Mater. Chem. A, 7, 31, 18209-18236, 2019.
[2] W. Xu and Y. Wang, Nano-Micro Lett., 11, 1, 1-30, 2019.
[3] X. Wanga, Z. Zhanga, M. Huanga, J. Fengb, S. Xionga, B. Xia, Nano Lett. 22, 1, 119–127, 2022.
