Anti-site mixing governs the electrochemical performances of olivine-type MgMnSiO4 cathodes for rechargeable magnesium batteries

Literature Information

Publication Date 2016-05-03
DOI 10.1039/C6CP00448B
Impact Factor 3.676
Authors

Takuya Mori, Titus Masese, Yuki Orikasa, Zhen-Dong Huang, Tetsuya Okado, Jungeun Kim, Yoshiharu Uchimoto


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Abstract

Rechargeable magnesium batteries are deemed as the next-generation secondary battery systems because of their high theoretical capacity and the terrestrial abundance of magnesium, which is used as the anode in these batteries. The cathode material is an important factor to improve the energy density of the magnesium batteries. In this study, we investigate olivine-type MgMnSiO4 cathode materials owing to their high theoretical capacity (>300 mA h g−1). The low-temperature synthesis of MgMnSiO4 suppresses anti-site mixing between Mg and Mn, which drastically improves the charge–discharge capacities of the magnesium battery cathode. Our results show that the suppression of the degree of anti-site mixing between Mg and Mn enhances the diffusion of Mg2+ during magnesium (de)insertion, and therefore, it is a dominant factor that affects the electrochemical performance of olivine-type MgMnSiO4.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
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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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