Reshma P R, Lakshmanan C, Prasad Arun K, Dhara Sandip
Materials Science Group, Indira Gandhi Centre for Atomic Research, A CI of Homi Bhabha National Institute, Kalpakkam, 603102, Tamil Nadu, India.
Material Measurement Laboratory, National Institute of Standards and Technology (NIST), Gaithersburg, MD, 20899, USA.
Sci Rep. 2025 Aug 27;15(1):31543. doi: 10.1038/s41598-025-17294-6.
The deteriorating and unevenly distributed Li reserves lead to the quest for Li-ion battery's alternatives.Hybrid metal-ion batteries are gaining attention as they effectively address the limited diffusion of heavier ions into cathode materials, typically involving the combination of multi and mono-valent metal-ions.The unavailability of high-performance cathode materials restricts the use of heavier ion (e.g., Zn) intercalation batteries even though they offer more stable anodic behavior and good charge capacity. In the present study, bilayer VO nanosheets demonstrate exceptional performance as a cathode material for Zn-ion battery and Zn/Li hybrid metal-ion battery facilitating a faster conduit of ion diffusion. The Zn-ion battery and Zn/Lihybrid metal-ion battery showed high specific capacities of 270 and 510 mAh/g with fast charging rates of 0.77, and 0.6 A/g, respectively. Li is a lighter ion with an ionic radius of 0.76Å compared to the Zn ion that of 0.74Å and hence has shown higher diffusion into the crystal. The introduction of Li in the hybrid metal-ion battery showed good cyclic performance with high coulombic efficiency. Thus, this study presents bilayer 2D VO as a favorable cathode material for Zn-ion and Zn/Li hybrid metal-ion batteries for the first time.
锂储量的不断恶化和分布不均促使人们寻求锂离子电池的替代品。混合金属离子电池正受到关注，因为它们有效地解决了较重离子向阴极材料中扩散受限的问题，通常涉及多价和单价金属离子的组合。高性能阴极材料的缺乏限制了较重离子（如锌）嵌入电池的使用，尽管它们具有更稳定的阳极行为和良好的充电容量。在本研究中，双层VO纳米片作为锌离子电池和锌/锂混合金属离子电池的阴极材料表现出卓越的性能，促进了离子扩散的更快传导。锌离子电池和锌/锂混合金属离子电池分别显示出270和510 mAh/g的高比容量，快速充电速率分别为0.77和0.6 A/g。锂是一种较轻的离子，离子半径为0.76Å，而锌离子的离子半径为0.74Å，因此锂在晶体中的扩散更高。在混合金属离子电池中引入锂表现出良好的循环性能和高库仑效率。因此，本研究首次提出双层二维VO作为锌离子和锌/锂混合金属离子电池的优良阴极材料。
