Нанокомпозит LiFePO4/C як катодний матеріал для літій-іонних акумуляторів високої потужності
Using a citric acid route, precursors have been synthesized and nanocomposites LiFePO4/C have been obtained by means of heat treatment having the particle size ca. 20 nm, specific surface area of more than 60 m2/g and the regulated content of carbon (7.6 to 12.5 wt. %). The properties of materials h...
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| Date: | 2014 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2014
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| Subjects: | |
| Online Access: | https://www.cpts.com.ua/index.php/cpts/article/view/268 |
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| Journal Title: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Summary: | Using a citric acid route, precursors have been synthesized and nanocomposites LiFePO4/C have been obtained by means of heat treatment having the particle size ca. 20 nm, specific surface area of more than 60 m2/g and the regulated content of carbon (7.6 to 12.5 wt. %). The properties of materials have been studied by thermal analysis, thermally programmed destruction, porosimetry, electronic microscopy; electrochemical characteristics have been evaluated in potentiodynamic and galvanostatic regimes. The composites obtained have specific capacity up to 134 mAh/g and demonstrate a capability of high rate discharge. In particular, upon loading with the current of 8500 mA/g (50 С), the sample containing 12.5% of carbon completely recovers its specific capacity. This signifies good prospects for the use of this material in high-rate electrochemical devices. |
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