2010 Fiscal Year Final Research Report
Preparation of Particles of Electroactive Transition Metal Compounds
| Project/Area Number |
20710090
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nanomaterials/Nanobioscience
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| Research Institution | Yokohama National University |
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Principal Investigator |
DOKKO Kaoru Yokohama National University, 工学研究院, 准教授 (70438117)
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| Project Period (FY) |
2008 – 2010
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| Keywords | ナノ粒子 / 水熱合成 / リチウム二次電池 |
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| Research Abstract |
The olivine-type compound LiMnPO_4 was prepared via a reaction between Li_3PO_4 and a MnSO_4 aqueous solution under hydrothermal conditions at 190℃. The specific surface area and particle morphology of LiMnPO_4 changed depending on the amount of water in the reaction mixtures, and the particle size decreased as the amount of water decreased. It was found that nanosized LiMnPO_4 particles of ca. 50nm can be prepared through the reaction between Li_3PO_4 and the molten aqua-complex of MnSO_4・nH_2O (n=4 or5). Galvanostatic charge and discharge tests revealed that the electrochemical reactivity of LiMnPO_4 at 30℃ increased as the particle size decreased. The small particle size contributes to the decrease in the overpotential for Mn^<2+/3+> redox and to the increase in the utilization of LiMnPO_4 as an active material in the cathode of lithium batteries.
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Research Products
(9 results)
