Rechargeable aluminum-ion batteries (AIBs) possess significant advantages of high energy density, safety performance and abundant natural resources, making them one of the desirable next-generation substitutes for lithium battery systems. However, the poor reversibility, short lifespan or low capacity of positive materials have limited its practical applications. In comparison with semiconductors, metallic nickel telluride (NiTe) alloy with enhanced electrical conductivity and fast electron transmission is a more favorable electrode material which could significantly decrease the kinetic barrier during battery operation for energy strorage. In this paper, the NiTe nanorods prepared through a simple hydrothermal routine enable to deliver an initial reversible capacity of approximately 570 mA h g-1 (under the current density of 200 mA g-1) on basis of the ionic liquid electrolyte, along with the average voltage platform of about 1.30 V. Moreover, the cycling performance could be easily enhanced by using a modified separator for forbidding the diffusion of soluble intermediate species to the negative electrodes side. At a high rate of 500 mA g-1, the NiTe nanorods could retain a specific capacity of about 307 mA h g-1 at the 100th cycle. The results have important implications for the research of transition metal tellurides as positive electrode materials for AIBs.

中文翻译：

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具有高容量和增强循环性能的可充电碲化镍/铝电池。

可充电铝离子电池（AIB）具有高能量密度，安全性能和丰富的自然资源的显着优势，使其成为锂电池系统理想的下一代替代产品之一。但是，正极材料的可逆性差，寿命短或容量低限制了其实际应用。与半导体相比，具有增强的导电性和快速的电子传输能力的金属碲化镍（NiTe）合金是一种更有利的电极材料，可以显着降低电池运行过程中的能量垒，从而实现能量存储。在本文中，通过简单的水热程序制备的NiTe纳米棒能够在离子液体电解质和平均电压平台的基础上提供约570 mA h g-1的初始可逆容量（在200 mA g-1的电流密度下）约为1.30V。此外，通过使用改进的隔板来禁止可溶性中间物质扩散到负极侧，可以容易地提高循环性能。NiTe纳米棒以500 mA g-1的高速率在第100个循环时可保持约307 mA h g-1的比容量。该结果对过渡金属碲化物作为AIBs正极材料的研究具有重要意义。通过使用改进的隔离层禁止可溶性中间物质扩散到负极侧，可以轻松提高循环性能。NiTe纳米棒以500 mA g-1的高速率在第100个循环时可保持约307 mA h g-1的比容量。该结果对过渡金属碲化物作为AIBs正极材料的研究具有重要意义。通过使用改进的隔离层禁止可溶性中间物质扩散到负极侧，可以轻松提高循环性能。NiTe纳米棒以500 mA g-1的高速率在第100个循环时可保持约307 mA h g-1的比容量。该结果对过渡金属碲化物作为AIBs正极材料的研究具有重要意义。