Reduced mesoporous Co3O4 nanowires grown on 3D graphene as efficient catalysts for oxygen reduction and binder-free electrodes in aluminum–air batteries

doi:10.1007/s10853-020-05448-y

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	Reduced mesoporous Co3O4 nanowires grown on 3D graphene as efficient catalysts for oxygen reduction and binder-free electrodes in aluminum–air batteries
	Liu, Yisi 3; Zhan, Faqi 1; Zhao, Nian 3; Pan, Qiyun 3; Li, Zhong 3; Du, Yue 3; Yang, Yahui 2
刊名	Journal of Materials Science
	2021-02-01
卷号	56 期号:5 页码:3861-3873
关键词	Aluminum Binders Cathodes Composite structures Electric discharges Electrocatalysts Electrolysis Electrolytic reduction Foams Graphene Mass transportation Mesoporous materials Morphology Nanowires Open circuit voltage Oxygen reduction reaction Secondary batteries Sodium BorohydrideDischarge current density Electrical conductivity Electrocatalytic activity Electrocatalytic performance Half-wave potential Hierarchically porous Specific capacities Three-dimensional graphene
ISSN号	00222461
DOI	10.1007/s10853-020-05448-y
英文摘要	Abstract: In recent years, research scholars have conducted in-depth research on the efficient and stable electrocatalysts for oxygen reduction reaction (ORR) and analyzed how to reduce the polymer binders in the cathode of metal–air batteries. Although some research progress has been made, there are still many challenges. On the basis of full consideration of factors such as good electrical conductivity, unique porous structure, improved performance, surface area, and synergistic effects, composite materials (m-Co3O4/3DG) of three-dimensional graphene and mesoporous Co3O4 nanowires are prepared on a Ni foam substrate. Here, a facile solution (NaBH4) reduction method is introduced, resulting in an increase in the oxygen vacancies on the surface of the mesoporous Co3O4 nanowires, thereby improving the electrocatalytic activity of m-Co3O4/3DG ORR. The reduced m-Co3O4/3DG composite exhibits a much positive half-wave potential of 0.84 V (vs. RHE) and onset potential of 0.93 V (vs. RHE), and much higher mass activity of 0.109 A mg−1 at 0.766 V (vs. RHE) compared with m-Co3O4/3DG, m-Co3O4, and 3D graphene electrocatalysts, or even superior to the Pt/C catalyst. In addition, when reduced m-Co3O4/3DG is used as the binder-free cathode of the aluminum–air battery, showing a 422.74 mAh g−1 specific capacity and a 1.53 V open-circuit voltage under the discharge current density of 1.0 mA cm−2, which are more excellent compared with the traditional Pt/C, m-Co3O4, and m-Co3O4/3DG electrodes. The 1D and 3D morphology hierarchically porous feature leads to high-efficiency surface reduction and charge and mass transportation. This research provides a solution reduction method with a simple operation to generate more defect states on electrocatalysts and supplies valuable view into the development of reduced Co3O4/3DG with excellent ORR electrocatalytic performance as binder-free cathodes in aluminum–air battery. Graphic abstract: [Figure not available: see fulltext.] © 2020, Springer Science+Business Media, LLC, part of Springer Nature.
语种	英语
出版者	Springer
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132304]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	1.State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 2.National and Local Joint Engineering Laboratory for New Petro-Chemical Materials and Fine Utilization of Resources, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha; 410081, China 3.Institute of Advanced Materials, Hubei Normal University, Huangshi; 435000, China;
推荐引用方式 GB/T 7714	Liu, Yisi,Zhan, Faqi,Zhao, Nian,et al. Reduced mesoporous Co3O4 nanowires grown on 3D graphene as efficient catalysts for oxygen reduction and binder-free electrodes in aluminum–air batteries[J]. Journal of Materials Science,2021,56(5):3861-3873.
APA	Liu, Yisi.,Zhan, Faqi.,Zhao, Nian.,Pan, Qiyun.,Li, Zhong.,...&Yang, Yahui.(2021).Reduced mesoporous Co3O4 nanowires grown on 3D graphene as efficient catalysts for oxygen reduction and binder-free electrodes in aluminum–air batteries.Journal of Materials Science,56(5),3861-3873.
MLA	Liu, Yisi,et al."Reduced mesoporous Co3O4 nanowires grown on 3D graphene as efficient catalysts for oxygen reduction and binder-free electrodes in aluminum–air batteries".Journal of Materials Science 56.5(2021):3861-3873.