| Autor: |
Atsuo Yamada, Gosuke Oyama, Shin-ichi Nishimura, Masashi Okubo, Kazuhiko Kai, Yo Kobayashi, Hajime Miyashiro |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
ChemPhysChem. 15:2156-2161 |
| ISSN: |
1439-4235 |
| DOI: |
10.1002/cphc.201301219 |
| Popis: |
The particle-size effects on the thermodynamic properties and kinetic behavior of a Li(x)FePO(4) electrode have a direct influence on the electrode properties. Thus, the development of high-performance Li-ion batteries containing a Li(x)FePO(4) cathode requires a complete understanding of the reaction mechanism at the atomic/nano/meso scale. In this work, we report electrochemical calorimetric and potentiometric studies on Li(x)FePO(4) electrodes with different particle sizes and clarify the particle-size effect on the reaction mechanism based on the entropy change of (de)lithiation. Electrochemical calorimetry results show that a reduction in particle size shrinks the miscibility gap of Li(x)FePO(4) while potentiometric measurements demonstrate that the Li(x)FePO(4) particles equilibrate into either a kinetically metastable state or a thermodynamically stable state depending on the particle size. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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