Cobalt-doped Mn3O4 nanocrystals embedded in graphene nanosheets as a high-performance bifunctional oxygen electrocatalyst for rechargeable Zn–Air batteries

查看全文 作　　者：Mengyang [1]Dong;Xu [1]Liu;Lixue [1]Jiang;Zhengju [1]Zhu;Yajie [1]Shu;Shan [1]Chen;Yuhai [1]Dou;Porun [1]Liu;Huajie [1]Yin;Huijun [1]Zhao

机构地区：[1]Centre for Clean Environment and Energy,Griffith University,Gold Coast Campus,QLD 4222,Australia

出　　处：《Green Energy & Environment》索引2020年第5卷第4期,共7页

基　　金：financially supported by the Australian Research Council(ARC)Discovery Project and Griffith University Postdoctoral Fellowship. 摘　　要：A non-noble-metal bifunctional catalyst with efficient and durable activity towards both the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER)is crucial to the development of rechargeable Zn-air batteries.Herein,a facile one-step hydrothermal method is reported for the synthesis of a high-performance bifunctional oxygen electrocatalyst,cobalt-doped Mn_(3)O_(4) nanocrystals supported on graphene nanosheets(Co–Mn_(3)O_(4)/G).Compare to pristine Mn_(3)O_(4),this Co–Mn_(3)O_(4)/G exhibits greatly enhanced electrocatalytic activity,delivering a halfwave potential of 0.866 V for the ORR and a low overpotential of 275 mV at 10 mA cm^(-2) for the OER.The zinc-air battery built with Co–Mn_(3)O_(4)/G shows a reduced charge–discharge voltage of 0.91 V at 10 mA cm^(-2),an power density of 115.24 mW cm^(-2) and excellent stability without any degradation after 945 cycles(315 h),outperforming the state-of-the-art Pt/C–Ir/C catalyst-based device. 关键词：Mn_(3)O_(4) Bifunctional electrocatalysts Oxygen reduction reaction Oxygen evolution reaction Zinc air battery

相关文献

参考文献（45）
引证文献（5）
耦合文献（0）

参考文献(45)

引证文献(5)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Cobalt-doped Mn3O4 nanocrystals embedded in graphene nanosheets as a high-performance bifunctional oxygen electrocatalyst for rechargeable Zn–Air batteries

参考文献(45)

引证文献(5)

用户提示