Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 18, Issue 19, Pages 13524-13529Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp00448b
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Funding
- Core Research for Evolutional Science and Technology (CREST)
- Grants-in-Aid for Scientific Research [15H05500] Funding Source: KAKEN
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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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