MXene-Stabilized VS₂ Nanostructures for High-Performance Aqueous Zinc Ion Storage

MXene-Stabilized VS₂ Nanostructures for High-Performance Aqueous Zinc Ion Storage

2024 | Liping Zhang, Yeying Li, Xianjie Liu, Ruping Yang, Junxiao Qiu, Jingkun Xu, Baoyang Lu, Johanna Rosen, Leiqiang Qin, Jianxia Jiang
This study presents a high-performance aqueous zinc-ion battery (AZIB) using a composite of vanadium disulfide (VS₂) and MXene (Ti₃C₂Tₓ) nanosheets. The composite structure, formed by integrating VS₂ nanosheets into MXene interlayers, creates a stable 2D heterogeneous layered structure that enhances ion transport and structural stability. The resulting VS₂/Ti₃C₂Tₓ composite film serves as both anode and cathode in AZIBs, demonstrating excellent electrochemical performance. The VS₂/Ti₃C₂Tₓ cathode exhibits a high specific capacity of 285 mAh g⁻¹ at 0.2 A g⁻¹ and maintains 76.7% capacity retention after 5000 cycles at 2 A g⁻¹. A flexible, zinc-free AZIB using the composite as anode and MnO₂/CNT as cathode achieves a high operating voltage of 2.0 V and 97% capacity retention after 5000 cycles at 2 A g⁻¹. The composite also shows good mechanical durability and is suitable for wearable devices. The study highlights the potential of VS₂/Ti₃C₂Tₓ as a promising material for Zn²⁺ storage due to its enhanced structural stability and electrochemical performance. The results demonstrate that the composite structure effectively improves the stability and performance of AZIBs, offering a new strategy for the development of high-performance aqueous batteries.This study presents a high-performance aqueous zinc-ion battery (AZIB) using a composite of vanadium disulfide (VS₂) and MXene (Ti₃C₂Tₓ) nanosheets. The composite structure, formed by integrating VS₂ nanosheets into MXene interlayers, creates a stable 2D heterogeneous layered structure that enhances ion transport and structural stability. The resulting VS₂/Ti₃C₂Tₓ composite film serves as both anode and cathode in AZIBs, demonstrating excellent electrochemical performance. The VS₂/Ti₃C₂Tₓ cathode exhibits a high specific capacity of 285 mAh g⁻¹ at 0.2 A g⁻¹ and maintains 76.7% capacity retention after 5000 cycles at 2 A g⁻¹. A flexible, zinc-free AZIB using the composite as anode and MnO₂/CNT as cathode achieves a high operating voltage of 2.0 V and 97% capacity retention after 5000 cycles at 2 A g⁻¹. The composite also shows good mechanical durability and is suitable for wearable devices. The study highlights the potential of VS₂/Ti₃C₂Tₓ as a promising material for Zn²⁺ storage due to its enhanced structural stability and electrochemical performance. The results demonstrate that the composite structure effectively improves the stability and performance of AZIBs, offering a new strategy for the development of high-performance aqueous batteries.
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Understanding MXene%E2%80%90Stabilized VS2 Nanostructures for High%E2%80%90Performance Aqueous Zinc Ion Storage