| Autor: |
Dongho KANG, Kotaro ITO, Keisuke SHIMIZU, Kenta WATANABE, Naoki MATSUI, Kota SUZUKI, Ryoji KANNO, Masaaki HIRAYAMA |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Electrochemistry, Vol 92, Iss 3, Pp 037008-037008 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2186-2451 |
| DOI: |
10.5796/electrochemistry.24-00017 |
| Popis: |
A thin-film battery composed of a LiFePO4 cathode/Li3PO4 electrolyte/Li anode was fabricated on a Pt/Ti/Si (PTS) substrate via RF magnetron sputtering. The amorphous Li3PO4 film was densely stacked on a 60 nm-thick LiFePO4 film, which provided a suitable reaction field for understanding the electrochemical properties of LiFePO4 at the interface with the solid electrolyte. The LiFePO4 cathode film exhibited highly reversible lithium desertion/insertion at the interface at room temperature and 60 °C, without any side reactions. An irreversible oxidation reaction occurred during the initial charging process at 100 °C, leading to an increase in the charge-transfer resistance of the LiFePO4/Li3PO4 interface with no significant decrease in the lithium desertion/insertion capacity of LiFePO4. This result suggests the formation of a resistive interphase via the decomposition of Li3PO4 at 100 °C. A severe decrease in capacity is observed at 125 °C, which indicates the LiFePO4-side interface contributed to the side reactions. The film battery exhibits a severe decrease in capacity at 125 °C. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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