Boosting oxygen reaction activity by coupling sulfides for high-performance rechargeable metal–air battery

Daojin Zhou; Yin Jia; Hongbin Yang; Wenwen Xu; Kai Sun; Junming Zhang; Shiyuan Wang; Yun Kuang; Bin Liu; Xiaoming Sun

doi:10.1039/C8TA08862D

Boosting oxygen reaction activity by coupling sulfides for high-performance rechargeable metal–air battery†

Daojin Zhou,^ab Yin Jia,^ac Hongbin Yang,^bd Wenwen Xu,^a Kai Sun,^ac Junming Zhang,^b Shiyuan Wang,^ac Yun Kuang,*^a Bin Liu*^b and Xiaoming Sun

*^ac

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* Corresponding authors

^a State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, China
E-mail: kuangyun@mail.buct.edu.cn, sunxm@mail.buct.edu.cn

^b School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
E-mail: liubin@ntu.edu.sg

^c College of Energy, Beijing University of Chemical Technology, Beijing, China

^d Institute for Materials Science and Devices, Suzhou University of Science and Technology, Suzhou, China

Abstract

Sluggish oxygen electrochemistry including both oxygen evolution reactions (OER) and oxygen reduction reactions (ORR) greatly restricts the performance of rechargeable metal–air battery. Herein, we couple NiFe sulfide (NiFeS₂) with S-doped graphene oxide (S-GO) via a simultaneous sulfurization strategy to significantly improve the OER and ORR activities. The NiFeS₂/S-GO on glassy carbon yields an OER current density of 10 mA cm⁻² at 1.47 V and an ORR half-wave potential at 0.74 V (vs. RHE), giving an overvoltage difference as low as 0.73 V. When assembled in a rechargeable Zn–air battery, the battery with NiFeS₂/S-GO air electrode exhibits a steady charging potential (1.98 V) with very little decay in discharging potential (from 1.20 to 1.17 V) for 180 charging–discharging cycles at 10 mA cm⁻². Our study provides new insights for the design of efficient bifunctional oxygen electrocatalysts for high-performance energy conversion and storage devices.

Journal of Materials Chemistry A

Boosting oxygen reaction activity by coupling sulfides for high-performance rechargeable metal–air battery†

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