Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM
This study investigated the stability of the surface film of the negative electrode by investigating how temperature affects the morphology of the surface film of the negative electrode using in-situ electrochemical atomic force microscope (AFM) in LiPF6-based electrolytes with the addition of vinyl...
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| Format: | Article |
| Language: | English |
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The Electrochemical Society of Japan
2025-06-01
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| Series: | Electrochemistry |
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| Online Access: | https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-71021/_html/-char/en |
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| author | Yasushi UEBOU Yoshihiko SATO Takeshi SASAKI |
| author_facet | Yasushi UEBOU Yoshihiko SATO Takeshi SASAKI |
| author_sort | Yasushi UEBOU |
| collection | DOAJ |
| description | This study investigated the stability of the surface film of the negative electrode by investigating how temperature affects the morphology of the surface film of the negative electrode using in-situ electrochemical atomic force microscope (AFM) in LiPF6-based electrolytes with the addition of vinylene carbonate (VC) or by replacing LiPF6 with lithium bis(fluorosulfonyl)imide (LiFSI). AFM measurements revealed that, in the case of the LiPF6-based electrolyte, blisters were generated by the reductive decomposition of the electrolyte at the step edge of the negative electrode, grew larger as the storage temperature increased up to 45 °C, and collapsed at 55 °C. The surface film with blisters was partially broken down at 65 °C. Conversely, with VC addition or LiFSI substitution, no blister collapse and film dissolution were observed, even when the temperature was raised to 65 °C. |
| format | Article |
| id | doaj-art-9ef30a9fa49d46cfb35462ca770c7f44 |
| institution | DOAJ |
| issn | 2186-2451 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | The Electrochemical Society of Japan |
| record_format | Article |
| series | Electrochemistry |
| spelling | doaj-art-9ef30a9fa49d46cfb35462ca770c7f442025-08-20T03:22:37ZengThe Electrochemical Society of JapanElectrochemistry2186-24512025-06-0193606300406300410.5796/electrochemistry.25-71021electrochemistryDirect Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFMYasushi UEBOU0Yoshihiko SATO1Takeshi SASAKI2GS Yuasa International Ltd.GS Yuasa International Ltd.GS Yuasa International Ltd.This study investigated the stability of the surface film of the negative electrode by investigating how temperature affects the morphology of the surface film of the negative electrode using in-situ electrochemical atomic force microscope (AFM) in LiPF6-based electrolytes with the addition of vinylene carbonate (VC) or by replacing LiPF6 with lithium bis(fluorosulfonyl)imide (LiFSI). AFM measurements revealed that, in the case of the LiPF6-based electrolyte, blisters were generated by the reductive decomposition of the electrolyte at the step edge of the negative electrode, grew larger as the storage temperature increased up to 45 °C, and collapsed at 55 °C. The surface film with blisters was partially broken down at 65 °C. Conversely, with VC addition or LiFSI substitution, no blister collapse and film dissolution were observed, even when the temperature was raised to 65 °C.https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-71021/_html/-char/enlithium-ion batterysurface film morphologyin-situ electrochemical afm |
| spellingShingle | Yasushi UEBOU Yoshihiko SATO Takeshi SASAKI Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM Electrochemistry lithium-ion battery surface film morphology in-situ electrochemical afm |
| title | Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM |
| title_full | Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM |
| title_fullStr | Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM |
| title_full_unstemmed | Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM |
| title_short | Direct Observation of Cycle and Temperature Effects on Surface Film Morphology of Graphite Negative Electrode by In-situ Electrochemical AFM |
| title_sort | direct observation of cycle and temperature effects on surface film morphology of graphite negative electrode by in situ electrochemical afm |
| topic | lithium-ion battery surface film morphology in-situ electrochemical afm |
| url | https://www.jstage.jst.go.jp/article/electrochemistry/93/6/93_25-71021/_html/-char/en |
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