journal article·2019-01-28

Mg Doped Perovskite LaNiO3 Nanofibers as an Efficient Bifunctional Catalyst for Rechargeable Zinc–Air Batteries

Juanjuan Bian, Rui Su, Yuan Yao, Jian Wang, Jigang Zhou, Fan Li, Zhong Lin Wang, Chunwen Sun

ACS Applied Energy Materials· Volume 2· Issue 1
Publisher page

Abstract

Rational design of efficient and durable bifunctional catalysts toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is important for rechargeable zinc–air batteries. Herein, Mg doped perovskite LaNiO3 (LNO) nanofibers (LNMO NFs) were prepared by a facile electrospinning method combined with subsequent calcination. LNMO NFs show a more positive half-wave potential of 0.69 V and a lower overpotential of 0.45 V at a current density of 10 mA cm–2 than those of the pristine LNO NFs. As an air electrode for zinc–air battery, the cell with LaNi0.85Mg0.15O3 NFs catalyst is able to deliver a high specific capacity of 809.9 mAh g–1 at a current density of 5 mA cm–2. It also shows an excellent cycling stability over 110 h at a current density of 10 mA cm–2. DFT calculation results demonstrate that the LNMO surface binds oxygen stronger than LNO, which contributes to enhanced OER activity as observed in our experiments. The results indicate that LNMO NFs are an efficient and durable bifunctional catalyst for zinc–air batteries.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Fuel Cells and Related Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Center for Excellence in Nanoscience, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, P. R. China

School of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China

Innovative Center for Advanced Materials, Hangzhou Dianzi University, Hangzhou 310018, China

Laboratory for Advanced Materials and Electron Microscopy, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Canadian Light Source Inc., University of Saskatchewan, Saskatoon, SK S7N 2V3, Canada

Beijing Key Laboratory for Green Catalysis and Separation, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, P. R. China

Center on Nanoenergy Research, School of Physical Science and Technology, Guangxi University, Nanning 530004, China

School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States

Funding

Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Beijing Municipal Commission of Science and Technology

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