Improvement of electronic conductivities by nao-junction interface control and its application to cathode materials of rechargeable lithium batteries
| Project/Area Number |
24360405
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Energy engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
TANIGUCHI Izumi 東京工業大学, 理工学研究科, 准教授 (00217126)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2014: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Keywords | リチウム二次電池 / 正極材料 / ナノ構造材料 / 珪酸マンガンリチウム / 珪酸鉄リチウム / 噴霧熱分解法 / ナノ複合化 / ピロ燐酸鉄リチウム / ピロ燐酸マンガンリチウム / リチウムイオン二次電池 / ボールミル粉砕法 / ナノ接合界面 / ケイ酸マンガンリチウム / ナノ複合体 / ナノ複合材料 |
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| Outline of Final Research Achievements |
Synthesis of Li2MSiO4 and Li2MP2O7 (M=Fe and Mn) was carried out from a combination of low temperature spray pyrolysis and ball-milling at various synthesis conditions, such as spray pyrolysis temperatures, synthesis atmospheres, annealing temperatures, ball-milling times rotational speeds and milling times. The effect of process conditions on their physical and electrochemical properties was discussed. Field-emission scanning electron microscopy and transmission electron microscopy with energy-dispersive spectroscopy verified that the final samples are agglomerates of Li2MSiO4 or Li2MP2O7 primary particles with less than 100 nm and that the carbon was well-distributed on the surface of the agglomerates. Li2MSiO4/C or Li2MP2O7 nanocomposite samples were used as an electrode material for rechargeable lithium batteries, and electrochemical measurements were carried out at room temperature. These cells showed good electrochemical properties.
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Report
(4 results)
Research Products
(5 results)
