An artificial sea urchin with hollow spines : improved mechanical and electrochemical stability in high-capacity Li-Ge batteries
Metallic germanium (Ge) as the anode can deliver a high specific capacity and high rate capability in lithium ion batteries. However, the large volume expansion largely restrains its further application. Herein, we constructed a three-dimensional sea urchin structure consisting of double layered Ge/TiO2 nanotubes as the spines via a ZnO template-removing method, which displays a capacity as high as 1060 mA h g-1 over 130 cycles. The robust, hollow oxide backbone serves as a strong support to accommodate the morphological change of Ge while the enhanced electron-transfer kinetics is attributed to the Ge content and the intimate contact between Ge and TiO2 during charging/discharging, which were confirmed using in situ transmission electronic microscopy observations and first-principles simulations. In addition, a high capacity retention of batteries using this hybrid composite as the anode was also achieved at low temperature.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:12 |
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| Enthalten in: |
Nanoscale - 12(2020), 10 vom: 14. März, Seite 5812-5816 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Liu, Jinyun [VerfasserIn] |
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| Anmerkungen: |
Date Revised 13.03.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1039/c9nr09107f |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM305716646 |
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| 100 | 1 | |a Liu, Jinyun |e verfasserin |4 aut | |
| 245 | 1 | 3 | |a An artificial sea urchin with hollow spines |b improved mechanical and electrochemical stability in high-capacity Li-Ge batteries |
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| 500 | |a Date Revised 13.03.2020 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status PubMed-not-MEDLINE | ||
| 520 | |a Metallic germanium (Ge) as the anode can deliver a high specific capacity and high rate capability in lithium ion batteries. However, the large volume expansion largely restrains its further application. Herein, we constructed a three-dimensional sea urchin structure consisting of double layered Ge/TiO2 nanotubes as the spines via a ZnO template-removing method, which displays a capacity as high as 1060 mA h g-1 over 130 cycles. The robust, hollow oxide backbone serves as a strong support to accommodate the morphological change of Ge while the enhanced electron-transfer kinetics is attributed to the Ge content and the intimate contact between Ge and TiO2 during charging/discharging, which were confirmed using in situ transmission electronic microscopy observations and first-principles simulations. In addition, a high capacity retention of batteries using this hybrid composite as the anode was also achieved at low temperature | ||
| 650 | 4 | |a Journal Article | |
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| 700 | 1 | |a Han, Tianli |e verfasserin |4 aut | |
| 700 | 1 | |a Lu, Qianqian |e verfasserin |4 aut | |
| 700 | 1 | |a Long, Jiawei |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Huigang |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Xi |e verfasserin |4 aut | |
| 700 | 1 | |a Niu, Junjie |e verfasserin |4 aut | |
| 700 | 1 | |a Li, Jinjin |e verfasserin |4 aut | |
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