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Aligned sulfur-deficient ZnS1−x nanotube arrays as efficient catalyzer for high-performance lithium/sulfur batteries
Nano Energy ( IF 17.6 ) Pub Date : 2021-02-15 , DOI: 10.1016/j.nanoen.2021.105891
Jiayi Wang , Yan Zhao , Gaoran Li , Dan Luo , Jiabing Liu , Yongguang Zhang , Xin Wang , Lingling Shui , Zhongwei Chen

Lithium/sulfur (Li/S) battery has been regarded as promising candidate for next-generation energy storage systems due to the high energy density. The big obstacle to realize the practical application of Li/S battery is to synchronously accelerate the redox kinetics and restrain the dissolution of polysulfides into the electrolyte. On this account, ZnS nanotubes with abundant sulfur vacancies (ZnS1−x) are constructed and deposited onto a freestanding carbon cloth electrode for Li/S batteries. The combination of architectural and sulfur-vacancy engineering regulates the electronic structure of ZnS as well as its interactions with active sulfur, thus by facilitates ion/electron transfer, immobilizes lithium polysulfide, and accelerates sulfur reaction kinetics. As a consequence, a capacity of 1043 mAh g−1 is obtained under a low current density of 0.2 C, as well as a capacity retention of 524 mAh g−1 over 500 cycles at 1 C. This work presents a convenient and effective material design strategy to improve the performance of Li/S batteries and promote the practical process.



中文翻译:

对齐的缺硫ZnS 1-x纳米管阵列作为高性能锂/硫电池的高效催化剂

锂/硫(Li / S)电池由于具有高能量密度而被认为是下一代储能系统的有希望的候选者。实现Li / S电池实际应用的最大障碍是同步加速氧化还原动力学并抑制多硫化物在电解质中的溶解。因此,构造了具有大量硫空位的ZnS纳米管(ZnS 1-x),并将其沉积在用于Li / S电池的独立式碳布电极上。建筑与硫空位工程的结合调节了ZnS的电子结构及其与活性硫的相互作用,从而促进了离子/电子转移,固定了多硫化锂,并加速了硫的反应动力学。结果,容量为1043 mAh g-1是在0.2 C的低电流密度下以及在1 C的500个循环中保持524 mAh g -1的容量时获得的。这项工作提出了一种方便有效的材料设计策略,以提高Li / S的性能。电池和促进实际过程。

更新日期:2021-03-02
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