Synthesis of α-MnO2 nanowires modified by Co3O4 nanoparticles as a high-performance catalyst for rechargeable Li–O2 batteries

Literature Information

Publication Date 2015-11-27
DOI 10.1039/C5CP06815K
Impact Factor 3.676
Authors

Fan Wang, Zhaoyin Wen, Chen Shen, Xiangwei Wu, Jianjun Liu


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Abstract

The α-MnO2 nanowires uniformly coated with Co3O4 nanoparticles were prepared as a bi-functional catalyst for rechargeable Li–O2 batteries. The α-MnO2 nanowires were 5–20 nm in diameter, ranging between 5 and 10 μm in length. And the coated Co3O4 nanoparticles were around 5 nm in diameter. The α-MnO2/Co3O4 hybrid had a high specific surface area of 329.5 cm2 g−1, and showed excellent catalytic property. Both of the charge and discharge overpotentials are effectively reduced and the batteries could stably work for more than 60 cycles. It is demonstrated that the catalytic performance of the α-MnO2/Co3O4 hybrid is not only associated with the morphology and size of the catalyst, but also with their synergetic effects and the oxygen vacancies produced at the surface of MnO2. The results of charge–discharge cycling tests demonstrate that this α-MnO2/Co3O4 hybrid catalyst is a promising candidate for the Li–O2 batteries.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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