Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries
Abstract The ether-based electrolytes are acknowledged for their compatibility with a diverse array of sodium-ion battery anodes, as well as their capability to enable efficient and reversible electrochemical reactions. However, they encounter a challenge of oxidation at high voltages. We find that...
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2025-03-01
|
| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-57910-7 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849774575616786432 |
|---|---|
| author | Xingyu Wang Qi Fan Ziheng Liu Xinyue Zhu Mei Yang Zhiyuan Guo Yuting Chen Liuqi Wang Yu Jing Hui Xia |
| author_facet | Xingyu Wang Qi Fan Ziheng Liu Xinyue Zhu Mei Yang Zhiyuan Guo Yuting Chen Liuqi Wang Yu Jing Hui Xia |
| author_sort | Xingyu Wang |
| collection | DOAJ |
| description | Abstract The ether-based electrolytes are acknowledged for their compatibility with a diverse array of sodium-ion battery anodes, as well as their capability to enable efficient and reversible electrochemical reactions. However, they encounter a challenge of oxidation at high voltages. We find that a standard diglyme-based electrolyte starts to oxidize and break down at voltages exceeding 3.9 V (vs. Na+/Na). This deterioration is attributed to the nucleophilic nature of the diglyme solvent and the presence of oxygen atoms that possess two unpaired electrons. To address this issue, we incorporate foreign anions into the electrolyte system to passivate the reactive sites of terminal H on diglyme solvents, inhibiting further dehydrogenation and oxidation during battery operation. The constructed cathode electrolyte interphase, enriched with NaF and NaNxOy, substantially boosts the oxidation resistance of electrolyte to over 4.8 V (vs. Na+/Na), expanding the stability window and rendering it feasible for various high-voltage cathode materials. Our approach also ensures compatibility with either hard carbon or commercial graphite anodes, guaranteeing operation in pouch cells. This study elucidates the relationship between interfacial chemistry and oxidation tolerance at high voltages, offering an approach to the development of practical ether-based electrolytes for high-energy-density battery technologies. |
| format | Article |
| id | doaj-art-fd6464b347734261aee8aa1ac1331a9e |
| institution | DOAJ |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-fd6464b347734261aee8aa1ac1331a9e2025-08-20T03:01:39ZengNature PortfolioNature Communications2041-17232025-03-011611910.1038/s41467-025-57910-7Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteriesXingyu Wang0Qi Fan1Ziheng Liu2Xinyue Zhu3Mei Yang4Zhiyuan Guo5Yuting Chen6Liuqi Wang7Yu Jing8Hui Xia9School of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologyJiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry UniversitySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologySchool of Materials Science and Engineering, Nanjing University of Science and TechnologyJiangsu Co-Innovation Centre of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry UniversitySchool of Materials Science and Engineering, Nanjing University of Science and TechnologyAbstract The ether-based electrolytes are acknowledged for their compatibility with a diverse array of sodium-ion battery anodes, as well as their capability to enable efficient and reversible electrochemical reactions. However, they encounter a challenge of oxidation at high voltages. We find that a standard diglyme-based electrolyte starts to oxidize and break down at voltages exceeding 3.9 V (vs. Na+/Na). This deterioration is attributed to the nucleophilic nature of the diglyme solvent and the presence of oxygen atoms that possess two unpaired electrons. To address this issue, we incorporate foreign anions into the electrolyte system to passivate the reactive sites of terminal H on diglyme solvents, inhibiting further dehydrogenation and oxidation during battery operation. The constructed cathode electrolyte interphase, enriched with NaF and NaNxOy, substantially boosts the oxidation resistance of electrolyte to over 4.8 V (vs. Na+/Na), expanding the stability window and rendering it feasible for various high-voltage cathode materials. Our approach also ensures compatibility with either hard carbon or commercial graphite anodes, guaranteeing operation in pouch cells. This study elucidates the relationship between interfacial chemistry and oxidation tolerance at high voltages, offering an approach to the development of practical ether-based electrolytes for high-energy-density battery technologies.https://doi.org/10.1038/s41467-025-57910-7 |
| spellingShingle | Xingyu Wang Qi Fan Ziheng Liu Xinyue Zhu Mei Yang Zhiyuan Guo Yuting Chen Liuqi Wang Yu Jing Hui Xia Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries Nature Communications |
| title | Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries |
| title_full | Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries |
| title_fullStr | Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries |
| title_full_unstemmed | Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries |
| title_short | Anion-mediated approach to overcome oxidation in ether electrolytes for high-voltage sodium-ion batteries |
| title_sort | anion mediated approach to overcome oxidation in ether electrolytes for high voltage sodium ion batteries |
| url | https://doi.org/10.1038/s41467-025-57910-7 |
| work_keys_str_mv | AT xingyuwang anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT qifan anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT zihengliu anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT xinyuezhu anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT meiyang anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT zhiyuanguo anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT yutingchen anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT liuqiwang anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT yujing anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries AT huixia anionmediatedapproachtoovercomeoxidationinetherelectrolytesforhighvoltagesodiumionbatteries |