具有高功率密度和長循環壽命的高性能可充電式水性鋅-離子電池是很有前景的，並且有著它獨特的優點，包括價格便宜以及高安全性等等，但是為了更進一步的發展，目前他們正在積極的尋找具有良好倍率能力與足夠循環壽命的合適陰極材料。

此研究表明，首次使用不同釩元素前驅物以及表面活性劑來調控不同酸鹼度的二碲化釩形貌，除此之外，發現到在具有單一步驟的鋅離子嵌入/脫嵌到層狀的二碲化釩奈米片機制可以經由非原位X光繞射(Ex-situ XRD)材料分析來證明鋅-離子的優異存儲性能，層狀二碲化釩奈米片在0.6 V展現出一個平的放電平台，在電流密度為0.1 A g-1有著高的比電容量(246.9 mA h g-1)，而且在幾乎沒有任何活化的狀況下，在電流密度為2 A g-1循環200圈可以看到電容量保留率是93.9 %，如此有潛力的循環穩定性應該歸功於快速的鋅離子擴散(鋅離子擴散係數大約是8･10-7 cm2s-1)。

目前的研究表明，層狀二碲化釩是對於水性鋅-離子電池而言是一種非常有前途的陰極材料，具有優於其他二維過度金屬硫化物(TMDs)的電池性能，而層狀結構也提供了與電解質的大量接觸，並且縮短了離子擴散的路徑，促進了快速動力學和長期穩定性。

關鍵字: 水性鋅離子電池、層狀的二碲化釩、平的放電平台、快速鋅-離子擴散、陰極

The realizing of high performances rechargeable aqueous zinc-ion batteries (AZIBs) with high power density and long cycle life is promising because of their good points (low costs and high safety, etc.). But for further development, while they seek for the suitable cathode materials with both good rate capability and adequate cycle life span. In this study, different vanadium precursors and surfactants were used for the first time to adjust the morphology of VTe2 with different pH values. Furthermore, It was discovered that the mechanism of intercalation/deintercalation of zinc ions with a single step into the layered vanadium ditelluride nanosheets can be demonstrated by ex-situ XRD material analysis to prove the superiority of zinc-ions. Storage performance The VTe2 nanosheets exhibits a flat discharge plateau at 0.6 V, a high specific capacity of 246.9 mA h g-1(at 0.1 A g-1). More importantly, outstanding cycle stability (capacity retention of 93.9%) after 150 cycles (at 2 Ag-1) without any activation process is achieved. Such a promising cyclic stability should be attributed to its fast Zn diffusion kinetics (Dzn2+=8･10-6 cm2s-1). The present finding implies that layered VTe2 is a very promising cathode material in AZIBs with outstanding battery performance superior to other layered transitional metal dichalcogenides. In the end, the layered structure provides abundant contact with electrolyte, shortens ion diffusion path, facilitating both fast kinetics and long-term stability.
Key words: aqueous zinc-ion batteries, VTe2 nanosheets, flat discharge plateau, fast Zn diffusion kinetics, cathode

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