Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte
Silicon oxide–graphite is a promising high-capacity anode material for next-generation lithium-ion batteries (LIBs). However, despite using a small fraction (≤5%) of Si, it suffers from a short cycle life owing to intrinsic swelling and particle pulverization during cycling, making practical applica...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-06-01
|
| Series: | Batteries |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2313-0105/11/7/250 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849714406779256832 |
|---|---|
| author | Kihun An Yen Hai Thi Tran Dong Guk Kang Seung-Wan Song |
| author_facet | Kihun An Yen Hai Thi Tran Dong Guk Kang Seung-Wan Song |
| author_sort | Kihun An |
| collection | DOAJ |
| description | Silicon oxide–graphite is a promising high-capacity anode material for next-generation lithium-ion batteries (LIBs). However, despite using a small fraction (≤5%) of Si, it suffers from a short cycle life owing to intrinsic swelling and particle pulverization during cycling, making practical application challenging. High-nickel (Ni ≥ 80%) oxide cathodes for high-energy-density LIBs and their operation beyond 4.2 V have been pursued, which requires the anodic stability of the electrolyte. Herein, we report a nonflammable multi-functional fluorinated ester–based liquid electrolyte that stabilizes the interfaces and suppresses the swelling of highly loaded 5 wt% SiO–graphite anode and LiNi<sub>0.88</sub>Co<sub>0.08</sub>Mn<sub>0.04</sub>O<sub>2</sub> cathode simultaneously in a 3.5 mAh cm<sup>−2</sup> full cell, and improves cycle life and battery safety. Surface characterization results reveal that the interfacial stabilization of both the anode and cathode by a robust and uniform solid electrolyte interphase (SEI) layer, enriched with fluorinated ester-derived inorganics, enables 80% capacity retention of the full cell after 250 cycles, even under aggressive conditions of 4.35 V, 1 C and 45 °C. This new electrolyte formulation presents a new opportunity to advance SiO-based high-energy density LIBs for their long operation and safety. |
| format | Article |
| id | doaj-art-fa07a3a789104573835b5bc0f18e6948 |
| institution | DOAJ |
| issn | 2313-0105 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj-art-fa07a3a789104573835b5bc0f18e69482025-08-20T03:13:43ZengMDPI AGBatteries2313-01052025-06-0111725010.3390/batteries11070250Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based ElectrolyteKihun An0Yen Hai Thi Tran1Dong Guk Kang2Seung-Wan Song3Department of Chemical Engineering & Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Chemical Engineering & Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Chemical Engineering & Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Chemical Engineering & Applied Chemistry, Chungnam National University, Daejeon 34134, Republic of KoreaSilicon oxide–graphite is a promising high-capacity anode material for next-generation lithium-ion batteries (LIBs). However, despite using a small fraction (≤5%) of Si, it suffers from a short cycle life owing to intrinsic swelling and particle pulverization during cycling, making practical application challenging. High-nickel (Ni ≥ 80%) oxide cathodes for high-energy-density LIBs and their operation beyond 4.2 V have been pursued, which requires the anodic stability of the electrolyte. Herein, we report a nonflammable multi-functional fluorinated ester–based liquid electrolyte that stabilizes the interfaces and suppresses the swelling of highly loaded 5 wt% SiO–graphite anode and LiNi<sub>0.88</sub>Co<sub>0.08</sub>Mn<sub>0.04</sub>O<sub>2</sub> cathode simultaneously in a 3.5 mAh cm<sup>−2</sup> full cell, and improves cycle life and battery safety. Surface characterization results reveal that the interfacial stabilization of both the anode and cathode by a robust and uniform solid electrolyte interphase (SEI) layer, enriched with fluorinated ester-derived inorganics, enables 80% capacity retention of the full cell after 250 cycles, even under aggressive conditions of 4.35 V, 1 C and 45 °C. This new electrolyte formulation presents a new opportunity to advance SiO-based high-energy density LIBs for their long operation and safety.https://www.mdpi.com/2313-0105/11/7/250SiO–graphite anodeswellinghigh-nickel cathodenonflammable high-voltage electrolytesolid electrolyte interphase (SEI) |
| spellingShingle | Kihun An Yen Hai Thi Tran Dong Guk Kang Seung-Wan Song Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte Batteries SiO–graphite anode swelling high-nickel cathode nonflammable high-voltage electrolyte solid electrolyte interphase (SEI) |
| title | Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte |
| title_full | Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte |
| title_fullStr | Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte |
| title_full_unstemmed | Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte |
| title_short | Enhancing the Cycle Life of Silicon Oxide–Based Lithium-Ion Batteries via a Nonflammable Fluorinated Ester–Based Electrolyte |
| title_sort | enhancing the cycle life of silicon oxide based lithium ion batteries via a nonflammable fluorinated ester based electrolyte |
| topic | SiO–graphite anode swelling high-nickel cathode nonflammable high-voltage electrolyte solid electrolyte interphase (SEI) |
| url | https://www.mdpi.com/2313-0105/11/7/250 |
| work_keys_str_mv | AT kihunan enhancingthecyclelifeofsiliconoxidebasedlithiumionbatteriesviaanonflammablefluorinatedesterbasedelectrolyte AT yenhaithitran enhancingthecyclelifeofsiliconoxidebasedlithiumionbatteriesviaanonflammablefluorinatedesterbasedelectrolyte AT donggukkang enhancingthecyclelifeofsiliconoxidebasedlithiumionbatteriesviaanonflammablefluorinatedesterbasedelectrolyte AT seungwansong enhancingthecyclelifeofsiliconoxidebasedlithiumionbatteriesviaanonflammablefluorinatedesterbasedelectrolyte |