Ali Zeeshan, Asif Muhammad, Zhang Teng, Huang Xiaoxiao, Hou Yanglong
Beijing Innovation Centre for Engineering Science and Advanced Technology (BIC-ESAT), Beijing Key Laboratory for Magnetoelectric Materials and Devices (BKLMMD), Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, China.
School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), H-12, Islamabad, 44000, Pakistan.
Small. 2019 Aug;15(33):e1901995. doi: 10.1002/smll.201901995. Epub 2019 Jun 6.
Multiple transition metals containing chalcogenides have recently drawn boosted attraction as anodes for sodium ion batteries (SIBs). Their greatly enhanced electrochemical performances can be attributed to the superior intrinsic conductivities and richer redox reactions, comparative to mono metal chalcogenides. To employ various binary metals comprising selenides (B-TMSs) for SIBs, discovery of a simplistic, scalable and universal synthesis approach is highly desirable. Herein, a simple, facile, and comprehensive strategy to produce various combinations of nanostructured B-TMSs is presented. As a proof of concept, optimized, high surface area bearing, and hierarchical nanosheets of iron-nickel selenide (FNSe), iron-cobalt selenide, and nickel-cobalt selenide are produced and employed in SIBs. These B-TMSs exhibit adequately high energy capacities, excellent rate capabilities, and an extraordinarily stable life of 2600 cycles. As far as it is known, it is the first work to discuss sodium storage of FNSe, so various in situ and ex situ battery analyses are carried out to probe the sodium storage mechanism. When employed in sodium full batteries, these B-TMSs present reasonably high reversible specific capacities even after 100 cycles. Overall, the presented strategy will pave the way for facile synthesis of numerous binary transition metal chalcogenides that are the potential materials for energy storage and conversion systems.
最近，含多种过渡金属的硫族化物作为钠离子电池（SIBs）的负极受到了更多关注。与单金属硫族化物相比，它们显著增强的电化学性能可归因于其优异的本征电导率和更丰富的氧化还原反应。为了将各种包含硒化物的二元金属（B-TMSs）用于SIBs，非常需要发现一种简单、可扩展且通用的合成方法。在此，我们提出了一种简单、便捷且全面的策略来制备纳米结构B-TMSs的各种组合。作为概念验证，制备了具有优化的高表面积和分级结构的铁镍硒化物（FNSe）、铁钴硒化物和镍钴硒化物纳米片，并将其用于SIBs。这些B-TMSs表现出足够高的能量容量、优异的倍率性能以及长达2600次循环的极其稳定的寿命。据我们所知，这是第一篇讨论FNSe储钠性能的工作，因此进行了各种原位和非原位电池分析以探究储钠机制。当用于钠全电池时，即使经过100次循环，这些B-TMSs仍具有相当高的可逆比容量。总体而言，所提出的策略将为简便合成众多二元过渡金属硫族化物铺平道路，这些材料是储能和转换系统的潜在材料。
