Effect of Buffer Size around Nanosilicon Anode Particles for Lithium-Ion Batteries
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- Shinichiroh Iwamura
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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- Hirotomo Nishihara
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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- Takashi Kyotani
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai, 980-8577, Japan
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説明
Si nanoparticle/carbon composites in which each Si nanoparticle was embedded in a spherical nanospace were synthesized by a newly established hard-template pathway. A series of composites having different nanospace sizes were prepared, and their lithium insertion/extraction behaviors as an anode for lithium-ion batteries were examined. The nanospace which surrounds each Si nanoparticle can be a buffer against the Si expansion during its lithiation. By using the series of composites, the effect of the buffer size around nanosilicon was systematically investigated. The cyclability became better with increasing the buffer size up to about 3 times larger than the Si volume, i.e., the size which allows Si to expand up to 4 times larger than its original volume. Indeed, the structure of the porous carbon matrix was well retained even after 20 charge–discharge cycles in the Si/carbon composite with this appropriate buffer size, whereas a composite with a smaller buffer size was totally destroyed. The further inc...
収録刊行物
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- The Journal of Physical Chemistry C
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The Journal of Physical Chemistry C 116 (10), 6004-6011, 2012-03-02
American Chemical Society (ACS)
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詳細情報 詳細情報について
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- CRID
- 1360567183188145024
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- ISSN
- 19327455
- 19327447
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- 資料種別
- journal article
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- データソース種別
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- Crossref
- KAKEN
- OpenAIRE