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Rational synthesis of carbon-coated hollow Ge nanocrystals with enhanced lithium-storage properties.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Zhang, Wei Chu, Xiaoqing Chen, Chaoji Xiang, Jingwei Liu, Xiaoxiao Huang, Yunhui Hu, Xianluo |
| Copyright Year | 2016 |
| Abstract | High-capacity anode materials based on alloy-type group IV elements always have large volume expansion during lithiation when they are used in lithium-ion batteries. Designing hollow structures is a well-established strategy to accommodate the volume change because of sufficient internal void space. Here we report a facile template-free route to prepare hollow Ge nanospheres without using any templates through a quasi-microemulsion method. Ge nanocrystals are preferably self-assembled along the interface of liquid vesicles between water and tetrahydrofuran, and well-defined hollow architectures of ∼50 nm in diameter are formed. Both the wall thickness and hollow interiors can be easily tuned. After subsequent carbon coating via pyrolysis of acetylene, the as-formed Ge@C nanocomposite with hollow interiors exhibits a highly reversible capacity of about 920 mA h g(-1) at 200 mA g(-1) over 50 cycles, and excellent rate capability. The small size and the high structural integrity of hollow Ge@C structures contribute to the superior lithium-storage performances. |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/c6nr00937a |
| Alternate Webpage(s) | http://or.nsfc.gov.cn/bitstream/00001903-5/444664/1/1000019475659.pdf |
| Alternate Webpage(s) | http://www.rsc.org/suppdata/c6/nr/c6nr00937a/c6nr00937a1.pdf |
| PubMed reference number | 27253080 |
| Alternate Webpage(s) | https://doi.org/10.1039/c6nr00937a |
| Journal | Medline |
| Volume Number | 8 |
| Issue Number | 24 |
| Journal | Nanoscale |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
