Three-dimensional Composite Catalysts for Al-O-2 Batteries Composed of CoMn2O4 Nanoneedles Supported on Nitrogen-Doped Carbon Nanotubes/Graphene
作者：
Liu, Yisi*;Zhan, Faqi;Wang, Biqiong;Xie, Bo;Sun, Qian;...
期刊：
ACS Applied Materials & Interfaces,2019年11(24):21526-21535 ISSN：1944-8244
通讯作者：
Liu, Yisi;Sun, Xueliang
作者机构：
[Xie, Bo; Liu, Yisi] Hubei Normal Univ, Inst Adv Mat, Huangshi 415000, Hubei, Peoples R China.;[Zhan, Faqi] Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China.;[Wang, Biqiong; Sun, Qian; Sun, Xueliang] Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada.;[Jiang, Hao] Hunan City Univ, Coll Mat & Chem Engn, Yiyang 413000, Peoples R China.;[Li, Jie] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Liu, Yisi] H;[Sun, Xueliang] U;Hubei Normal Univ, Inst Adv Mat, Huangshi 415000, Hubei, Peoples R China.;Univ Western Ontario, Dept Mech & Mat Engn, London, ON N6A 5B9, Canada.
关键词：
3D graphene;aluminum-air coin cells;chemical vapor deposition;nitrogen-doped carbon nanotubes;oxygen reduction reaction
摘要：
Great efforts have been focused on studying high-efficiency and stable catalysts toward oxygen reduction reaction (ORR) in metal-air batteries. In view of synergistic effects and improved properties, carbon nanotubes and three-dimensional graphene (CNTs-3D graphene) hybrid catalysts developed via a well-controlled route are urgently required. Herein, a CoMn2O4 (CMO) nanoneedle-supported nitrogen-doped carbon nanotubes/3D graphene (NCNTs/3D graphene) composite was prepared by in situ chemical vapor deposition (CVD) along with hydrothermal methods over a Ni foam substrate. The cyclic voltammetry and linear sweep voltammograms results indicate that the CMO/NCNTs/3D graphene hybrid possesses remarkable electrocatalytic performance toward ORR in alkaline conditions compared with NCNTs/3D graphene, CMO/3D graphene, and 3D graphene catalysts, even outperforming the commercial 20 wt % Pt/C catalyst. Moreover, the Al-air coin cell employing CMO/NCNTs/3D graphene as cathode catalysts obtains an open circuit voltage of 1.55 V and a specific capacity of 312.8 mA h g-1, which are superior to the Al-air coin cell with NCNTs/3D graphene as catalysts. This work supplies new insights to advanced electrocatalysts introducing NCNTs/3D graphene as a catalyst support to develop scalable transition-metal oxide/NCNTs/3D graphene hybrids with excellent catalytic activity toward ORR in Al-air systems. © 2019 American Chemical Society.
语种：
英文
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