| Budget Amount *help |
¥50,830,000 (Direct Cost: ¥39,100,000、Indirect Cost: ¥11,730,000)
Fiscal Year 2016: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2015: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2014: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2013: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2012: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
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| Outline of Final Research Achievements |
The electronic properties of organic materials are understood in terms of their charge and spin. Since organic radical species can undergo fast charge transfer, they are expected to be applied to active battery materials. We developed new anode materials of the secondary batteries to store energy using heavy group 14 element radicals. Si radical battery showed remarkable cycle stability without significant loss of power density. Utilizing the reversible redox process between hypervalent sulfur radicals and the corresponding anions, we also developed bipolar radical battery with high output voltage of 2 V. We also found that dendritic Li formation on the anode surface is avoided up to a practical current density of 10 mA/g at 5 °C when the three-dimensional amorphous polysilynes (RSi)n (R = Me, Ph) are used as anode materials, affording reversible capacities of 244 mAh/g and 180 mAh/g, respectively.
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