Stabilizing Pt by Introducing TaON to Enhance the Long-Term Stability in Zinc-Air Batteries
Abstract
Abstract For many years, the application of zinc-air batteries (ZABs) has been plagued by the limited durability of platinum (Pt)-based catalysts. Here, we overcome this problem by adopting an intelligent catalyst design, introducing tantalum (oxy)nitrides (TaON) as a carrier to store oxygen species and simultaneously suppress the oxidation and dissolution of Pt. Thanks to the corrosion resistance of TaON and the strong metal-support interaction, the 10%Pt/TaON/C catalyst shows negligible activity decay after 5000 cyclic voltammetry cycles and maintains excellent charge-discharge cycling performance for 700 h in ZABs. X-ray photoelectron spectroscopy and theoretical calculations indicate that the introduction of TaON facilitates the rearrangement of interfacial charges, thereby enhancing the covalency of the Pt–C bond in 10%Pt/TaON/C.
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Authors: Jiatong Han, Zihan Wang, Qi Liu, Genqiang Zhang, Fengjiao Song, Xiaohui Ma, Yongqiang Zhang, Wenxiu He, Ping Bai
Institutions: Shanghai Jiao Tong University, Beijing Institute of Technology, Inner Mongolia University of Science and Technology, Beijing Electronic Science and Technology Institute, Beijing Research Institute of Mechanical and Electrical Technology, Mongolian University of Science and Technology, Inner Mongolia University of Technology