Lai Chenglong, Wang Jie, Lei Wen, Xuan Cuijuan, Xiao Weiping, Zhao Tonghui, Huang Ting, Chen Lingxuan, Zhu Ye, Wang Deli
Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering , Huazhong University of Science and Technology , Wuhan 430074 , China.
Department of Applied Physics , The Hong Kong Polytechnic University , Hung Horn, Kowloon , Hong Kong 999077 , China.
ACS Appl Mater Interfaces. 2018 Nov 7;10(44):38093-38100. doi: 10.1021/acsami.8b13751. Epub 2018 Oct 29.
Exploring bifunctional oxygen electrode catalysts with efficient and stable oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) performance is one of the limitations for high-performance zinc-air battery. In this work, NiFe alloy nanoparticles incorporated in three-dimensional (3D) carbon nanotube (CNT)/graphene nanosheet composites with N and S codoping (NiFe/N-S-CNTs) as bifunctional oxygen electrode electrocatalysts for zinc-air battery. The main particle size of NiFe nanoparticles could be well restricted because of the unique 3D structure of carbon nanotube/graphene nanosheet composites (N-S-CNTs). The large specific area of N-S-CNTs is conducive to the uniform dispersion of NiFe nanoparticles. On the basis of the synergistic effect of NiFe nanoparticles with N-S-CNTs, and the sufficient exposure of reactive sites, the synthesized NiFe/N-S-CNTs catalyst exhibits excellent OER performance with a low overpotential of 215 mV at 10 mA cm, and efficient ORR activity with a half-wave potential of 0.877 V. When used as an electrocatalyst in zinc-air battery, the device exhibits a power density of 180.0 mW cm and long term durability for 500 h.
探索具有高效稳定氧还原反应（ORR）/析氧反应（OER）性能的双功能氧电极催化剂是高性能锌空气电池面临的限制之一。在这项工作中，将镍铁合金纳米颗粒掺入具有氮和硫共掺杂的三维（3D）碳纳米管（CNT）/石墨烯纳米片复合材料（NiFe/N-S-CNTs）中，作为锌空气电池的双功能氧电极电催化剂。由于碳纳米管/石墨烯纳米片复合材料（N-S-CNTs）独特的3D结构，镍铁纳米颗粒的主要粒径能够得到很好的限制。N-S-CNTs的大比表面积有利于镍铁纳米颗粒的均匀分散。基于镍铁纳米颗粒与N-S-CNTs的协同效应以及反应位点的充分暴露，合成的NiFe/N-S-CNTs催化剂表现出优异的OER性能，在10 mA cm下过电位低至215 mV，以及高效的ORR活性，半波电位为0.877 V。当用作锌空气电池的电催化剂时，该装置表现出180.0 mW cm的功率密度和500 h的长期耐久性。
