Wang Chunlei, Zhao Chunyu, Pu Xiangjun, Zeng Yubin, Wei Yingjin, Cao Yuliang, Chen Zhongxue
Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China.
Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China.
ACS Appl Mater Interfaces. 2024 Apr 10;16(14):17637-17648. doi: 10.1021/acsami.4c01311. Epub 2024 Mar 28.
Aqueous zinc-ion batteries (ZIBs) are competitive among the elective candidates for electrochemical energy storage systems, but the intrinsic drawbacks of zinc metal anodes such as dendrites and corrosion severely hinder their large-scale application. Developing alternative anode materials capable of high reversibility and stability for storing Zn ions is a feasible approach to circumvent the challenge. Herein, a sulfur-defect-induced TiS (D-TiS) as a promising intercalation anode material for ZIBs is designed. The abundant Zn-storage active sites and lower Zn migration barrier induced by sulfur defects endow D-TiS with a high capacity for Zn-storage (219.1 mA h g at 0.05 A g) and outstanding rate capability (107.3 mA h g at 5 A g). In addition, a slight volume change of 8.1% is identified upon Zn storage, which favors a prolonged cycling life (50.3% capacity remaining in 1500 cycles). More significantly, the D-TiS||ZnMnO full battery demonstrates a high discharge capacity of 155.7 mA h g with a capacity retention of 59.8% in 400 cycles. It has been estimated that the high-capacity, low-operation voltage, and long-life D-TiS can be a promising component of the ZIB anode material family, and the strategy proposed in this work will provide guidance to the defect engineering of high-performance electrode materials toward energy storage applications.
水系锌离子电池（ZIBs）在电化学储能系统的备选方案中具有竞争力，但锌金属负极的固有缺点，如枝晶和腐蚀，严重阻碍了它们的大规模应用。开发能够实现高可逆性和稳定性来存储锌离子的替代负极材料是应对这一挑战的可行方法。在此，设计了一种硫缺陷诱导的TiS（D-TiS）作为一种有前景的ZIBs嵌入负极材料。硫缺陷诱导产生的丰富的锌存储活性位点和较低的锌迁移势垒，赋予了D-TiS高的锌存储容量（在0.05 A g时为219.1 mA h g）和出色的倍率性能（在5 A g时为107.3 mA h g）。此外，在存储锌时，D-TiS的体积仅轻微变化8.1%，这有利于延长循环寿命（在1500次循环中仍保留50.3%的容量）。更重要的是，D-TiS||ZnMnO全电池在400次循环中表现出155.7 mA h g的高放电容量和59.8%的容量保持率。据估计，高容量、低工作电压和长寿命的D-TiS有望成为ZIB负极材料家族的一员，并且本工作中提出的策略将为高性能电极材料用于储能应用的缺陷工程提供指导。
