Bronze-type vanadium dioxide holey nanobelts as high performing cathode material for aqueous aluminium-ion batteries,Journal of Materials Chemistry A

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Bronze-type vanadium dioxide holey nanobelts as high performing cathode material for aqueous aluminium-ion batteries
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020-06-06 , DOI: 10.1039/d0ta03986a
Yi Cai _{1,

2,

3} , Sonal Kumar _{1,

2,

3} , Rodney Chua _{1,

2,

3} , Vivek Verma _{1,

2,

3} , Du Yuan _{1,

2,

3} , Zongkui Kou _{3,

4,

5} , Hao Ren _{1,

2,

3} , Hemal Arora _{3,

6} , Madhavi Srinivasan _{1,

2,

3,

3,

7}

Affiliation

Aqueous rechargeable aluminium-ion batteries (AIBs) are promising post lithium-ion battery candidates. However, the capacity and cycling stability are limited by the cathode materials, hindering their widespread application. Herein, bronze-type vanadium dioxide (VO₂–B) holey nanobelts have been designed as the cathode material to improve both the capacity and cycling stability for high-performance aqueous AIBs. Benefiting from the unique shear structure and two-dimensional holey nanobelt morphology, the VO₂–B electrode delivers a superior specific capacity of up to 234 mA h g⁻¹ at 150 mA g⁻¹ and exhibits a high capacity retention of 77.2% over 1000 cycles at 1 A g⁻¹, which are among the best cathode performances reported for aqueous AIBs. Moreover, a combination of electro-kinetic analysis and ex situ structural evolution characterization experiments reveals the reaction storage mechanism underlying the superior performance. Specifically, proton and Al³⁺ ions can reversibly co-intercalate/de-intercalate into/from VO₂–B. The integration of shear structure and unique holey nanobelts may open the route to the design of high-performance cathodes for multi-valence ion batteries.

中文翻译：

青铜型二氧化钒多孔纳米带，作为水性铝离子电池的高性能阴极材料

水性可充电铝离子电池（AIB）在锂离子电池之后有望成为候选产品。但是，容量和循环稳定性受到阴极材料的限制，阻碍了它们的广泛应用。在这里，青铜型二氧化钒（VO ₂ -B）多孔纳米带已被设计为阴极材料，以提高高性能水性AIB的容量和循环稳定性。得益于独特的剪切结构和二维多孔纳米带形态，VO ₂ –B电极在150 mA g ^-1时可提供高达234 mA hg ^-1的优异比容量，在1000以上的条件下仍可保持77.2％的高容量在1 A g ^-1下循环，这是报道的水性AIB最佳阴极性能之一。此外，电动力学分析和异位结构演化表征实验的结合揭示了优异性能背后的反应存储机理。具体来说，质子和Al ³⁺离子可以可逆地共嵌入/脱出VO ₂ -B。剪切结构和独特的多孔纳米带的整合可能为多价离子电池高性能阴极的设计开辟道路。

更新日期：2020-06-30

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