Interfacial Designs of MXenes for Mild Aqueous Zinc-Ion Storage
Rui Guo (TU Delft - RST/Storage of Electrochemical Energy, Shaanxi Normal University)
Chaofan Chen (TU Delft - RST/Storage of Electrochemical Energy)
Lars J. Bannenberg (TU Delft - RID/TS/Instrumenten groep)
Hao Wang (TU Delft - RST/Storage of Electrochemical Energy, Donghua University)
Haozhe Liu (Student TU Delft, Shaanxi Normal University)
Minghao Yu (Technische Universität Dresden)
Zdenek Sofer (University of Chemistry and Technology Prague)
Zhibin Lei (Shaanxi Normal University)
Xuehang Wang (Donghua University)
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Abstract
Limited Li resources, high cost, and safety risks of using organic electrolytes have stimulated a strong motivation to develop non-Li aqueous batteries. Aqueous Zn-ion storage (ZIS) devices offer low-cost and high-safety solutions. However, their practical applications are at the moment restricted by their short cycle life arising mainly from irreversible electrochemical side reactions and processes at the interfaces. This review sums up the capability of using 2D MXenes to increase the reversibility at the interface, assist the charge transfer process, and thereby improve the performance of ZIS. First, they discuss the ZIS mechanism and irreversibility of typical electrode materials in mild aqueous electrolytes. Then, applications of MXenes in different ZIS components are highlighted, including as electrodes for Zn2+ intercalation, protective layers of Zn anode, hosts for Zn deposition, substrates, and separators. Finally, perspectives are put forward on further optimizing MXenes to improve the ZIS performance.
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