{"title":"通过异盐添加剂策略实现竞争性溶解结构,从而实现温度适应性钠离子电池","authors":"Pei Huang, Jialin Lin, Zian Wang, Weijie Li, Yuejiao Chen, Liangjun Zhou, Libao Chen, Chunxiao Zhang, Weifeng Wei","doi":"10.1002/adfm.202413302","DOIUrl":null,"url":null,"abstract":"Sodium metal batteries (SMBs) are the ultimate choice for high-energy density sodium-based batteries. However, their practicality is still constrained by the uncontrolled side reactions and unstable solid electrolyte interface (SEI) between the electrolyte and Na-metal anode. Herein, a hetero-salt additive (Lithium difluorophosphate, LiDFP) strategy is proposed to optimize the solvation structure of pseudo gel-polymer electrolyte (pGPE) and construct robust SEI on Na metal anode, thereby enhancing Na<sup>+</sup> deposition/stripping kinetics. Detailed characterization reveals that Li<sup>+</sup> with lower binding energy to solvent molecules can steal solvent molecules from Na<sup>+</sup> coordination environment, and then push anions to further coordinate with Na<sup>+</sup>. The formed anion-enriched solvation structure can assist to restrain side reactions and form a robust inorganics-dominated SEI on Na metal anode. Consequently, such optimization effectively realizes outstanding electrochemical performance of the cells under wide operation temperature (−20 to 70 °C) and prolongs cycling life (1900 h) of Na plating/stripping. Furthermore, paired with commercial NaNi<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (NFM) cathode and hard carbon (HC) anode, the pouch cell using pGPE+0.5%LiDFP delivers a high-capacity retention of 87.5% at 45 °C after 250 cycles. It is believed that this work affords emerging chances for the rational electrolyte design of stable wide-temperate SIBs.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":null,"pages":null},"PeriodicalIF":18.5000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Competitive Solvation Structures via Hetero-Salt Additive Strategy Enables Temperature-Adaptive Sodium-Ion Batteries\",\"authors\":\"Pei Huang, Jialin Lin, Zian Wang, Weijie Li, Yuejiao Chen, Liangjun Zhou, Libao Chen, Chunxiao Zhang, Weifeng Wei\",\"doi\":\"10.1002/adfm.202413302\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Sodium metal batteries (SMBs) are the ultimate choice for high-energy density sodium-based batteries. However, their practicality is still constrained by the uncontrolled side reactions and unstable solid electrolyte interface (SEI) between the electrolyte and Na-metal anode. Herein, a hetero-salt additive (Lithium difluorophosphate, LiDFP) strategy is proposed to optimize the solvation structure of pseudo gel-polymer electrolyte (pGPE) and construct robust SEI on Na metal anode, thereby enhancing Na<sup>+</sup> deposition/stripping kinetics. Detailed characterization reveals that Li<sup>+</sup> with lower binding energy to solvent molecules can steal solvent molecules from Na<sup>+</sup> coordination environment, and then push anions to further coordinate with Na<sup>+</sup>. The formed anion-enriched solvation structure can assist to restrain side reactions and form a robust inorganics-dominated SEI on Na metal anode. Consequently, such optimization effectively realizes outstanding electrochemical performance of the cells under wide operation temperature (−20 to 70 °C) and prolongs cycling life (1900 h) of Na plating/stripping. Furthermore, paired with commercial NaNi<sub>1/3</sub>Fe<sub>1/3</sub>Mn<sub>1/3</sub>O<sub>2</sub> (NFM) cathode and hard carbon (HC) anode, the pouch cell using pGPE+0.5%LiDFP delivers a high-capacity retention of 87.5% at 45 °C after 250 cycles. It is believed that this work affords emerging chances for the rational electrolyte design of stable wide-temperate SIBs.\",\"PeriodicalId\":112,\"journal\":{\"name\":\"Advanced Functional Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.5000,\"publicationDate\":\"2024-09-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Functional Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/adfm.202413302\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Functional Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/adfm.202413302","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Sodium metal batteries (SMBs) are the ultimate choice for high-energy density sodium-based batteries. However, their practicality is still constrained by the uncontrolled side reactions and unstable solid electrolyte interface (SEI) between the electrolyte and Na-metal anode. Herein, a hetero-salt additive (Lithium difluorophosphate, LiDFP) strategy is proposed to optimize the solvation structure of pseudo gel-polymer electrolyte (pGPE) and construct robust SEI on Na metal anode, thereby enhancing Na+ deposition/stripping kinetics. Detailed characterization reveals that Li+ with lower binding energy to solvent molecules can steal solvent molecules from Na+ coordination environment, and then push anions to further coordinate with Na+. The formed anion-enriched solvation structure can assist to restrain side reactions and form a robust inorganics-dominated SEI on Na metal anode. Consequently, such optimization effectively realizes outstanding electrochemical performance of the cells under wide operation temperature (−20 to 70 °C) and prolongs cycling life (1900 h) of Na plating/stripping. Furthermore, paired with commercial NaNi1/3Fe1/3Mn1/3O2 (NFM) cathode and hard carbon (HC) anode, the pouch cell using pGPE+0.5%LiDFP delivers a high-capacity retention of 87.5% at 45 °C after 250 cycles. It is believed that this work affords emerging chances for the rational electrolyte design of stable wide-temperate SIBs.
期刊介绍:
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