| Autor: |
Won-Il Cho, Dong-Myung Jang, Jeunghee Park, Cang-Hyun Kim, Hyungsoon Im, Yong-Jae Cho, Hansung Kim, Yoon Myung, Min-Seob Song, Chan-Su Chung, EunHee Cha, Young-Rok Im, Seung-Hyuk Back |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Journal of the Korean Electrochemical Society. 15:181-189 |
| ISSN: |
1229-1935 |
| DOI: |
10.5229/jkes.2012.15.3.181 |
| Popis: |
We developed a new high-yield synthesis method of free-standing germanium nanocrystals (Ge NCs) by means of the gas-phase photolysis of tetramethyl germanium in a closed reactor using an Nd-YAG pulsed laser. Size control (5-100 nm) can be simply achieved using a quenching gas. The Ge1-xSix NCs were synthesized by the photolysis of a tetramethyl silicon gas mixture and their composition was controlled by the partial pressure of precursors. The as-grown NCs are sheathed with thin (1-2 nm) carbon layers, and well dispersed to form a stable colloidal solution. Both Ge NC and Ge-RGO hybrids exhibit excellent cycling performance and high capacity of the lithium ion battery (800 and 1100 mAh/g after 50 cycles, respectively) as promising anode materials for the development of high-performance lithium batteries. This novel synthesis method of Ge NCs is expected to contribute to expand their applications in high-performance energy con- version systems. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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