Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface
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 electroc...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2024-03-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/92/3/92_24-00017/_html/-char/en |
| _version_ | 1827304596987445248 |
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| author | Dongho KANG Kotaro ITO Keisuke SHIMIZU Kenta WATANABE Naoki MATSUI Kota SUZUKI Ryoji KANNO Masaaki HIRAYAMA |
| author_facet | Dongho KANG Kotaro ITO Keisuke SHIMIZU Kenta WATANABE Naoki MATSUI Kota SUZUKI Ryoji KANNO Masaaki HIRAYAMA |
| author_sort | Dongho KANG |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-24T17:39:38Z |
| format | Article |
| id | doaj.art-753e42963fed46428b0247570b8bc4a3 |
| institution | Directory Open Access Journal |
| issn | 2186-2451 |
| language | English |
| last_indexed | 2024-04-24T17:39:38Z |
| publishDate | 2024-03-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj.art-753e42963fed46428b0247570b8bc4a32024-03-28T01:01:17ZengThe Electrochemical Society of JapanElectrochemistry2186-24512024-03-0192303700803700810.5796/electrochemistry.24-00017electrochemistryFabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte InterfaceDongho KANG0https://orcid.org/0009-0002-6453-3423Kotaro ITO1https://orcid.org/0009-0002-1344-7509Keisuke SHIMIZU2https://orcid.org/0000-0002-3021-2915Kenta WATANABE3https://orcid.org/0000-0003-0827-7381Naoki MATSUI4https://orcid.org/0000-0001-9784-6421Kota SUZUKI5https://orcid.org/0000-0002-2473-0724Ryoji KANNO6https://orcid.org/0000-0002-0593-2515Masaaki HIRAYAMA7https://orcid.org/0000-0003-4804-4208Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of TechnologyDepartment of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of TechnologyResearch Center for All-Solid-State Battery, Institute of Innovation Research, Tokyo Institute of TechnologyDepartment of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of TechnologyDepartment of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of TechnologyDepartment of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of TechnologyResearch Center for All-Solid-State Battery, Institute of Innovation Research, Tokyo Institute of TechnologyDepartment of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of TechnologyA 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.https://www.jstage.jst.go.jp/article/electrochemistry/92/3/92_24-00017/_html/-char/enall solid-state batteryolivine-type cathodeamorphous li3po4 electrolytethin-film battery |
| spellingShingle | Dongho KANG Kotaro ITO Keisuke SHIMIZU Kenta WATANABE Naoki MATSUI Kota SUZUKI Ryoji KANNO Masaaki HIRAYAMA Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface Electrochemistry all solid-state battery olivine-type cathode amorphous li3po4 electrolyte thin-film battery |
| title | Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface |
| title_full | Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface |
| title_fullStr | Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface |
| title_full_unstemmed | Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface |
| title_short | Fabrication and High-temperature Electrochemical Stability of LiFePO4 Cathode/Li3PO4 Electrolyte Interface |
| title_sort | fabrication and high temperature electrochemical stability of lifepo4 cathode li3po4 electrolyte interface |
| topic | all solid-state battery olivine-type cathode amorphous li3po4 electrolyte thin-film battery |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/92/3/92_24-00017/_html/-char/en |
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