Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries
文献类型：CNKI期刊论文
| 作者 | Ruo Wang; Jiawei Li; Bing Han; Qingrong Wang; Ruohong Ke; Tong Zhang; Xiaohu Ao; Guangzhao Zhang; Zhongbo Liu; Yunxian Qian |
| 发表日期 | 2023-12-22 |
| 出处 | Journal of Energy Chemistry
 |
| 关键词 | Lithium metal batteries High-voltage layered oxides Fluorinated ether-based electrolytes Solid electrolyte interphase Cathode electrolyte interphase |
| 英文摘要 | Li metal batteries using high-voltage layered oxides cathodes are of particular interest due to their high energy density. However, they suffer from short lifespan and extreme safety concerns, which are attributed to the degradation of layered oxides and the decomposition of electrolyte at high voltage, as well as the high reactivity of metallic Li. The key is the development of stable electrolytes against both highvoltage cathodes and Li with the formation of robust interphase films on the surfaces. Herein, we report a highly fluorinated ether, 1,1,1-trifluoro-2-[(2,2,2-trifluoroethoxy) methoxy] ethane(TTME), as a cosolvent, which not only functions as a diluent forming a localized high concentration electrolyte(LHCE), but also participates in the construction of the inner solvation structure. The TTME-based electrolyte is stable itself at high voltage and induces the formation of a unique double-layer solid electrolyte interphase(SEI) film, which is embodied as one layer rich in crystalline structural components for enhanced mechanical strength and another amorphous layer with a higher concentration of organic components for enhanced flexibility. The Li||Cu cells display a noticeably high Coulombic efficiency of 99.28% after 300 cycles and Li symmetric cells maintain stable cycling more than 3200 h at 0.5 m A/cm~2 and 1.0m Ah/cm~2. In addition, lithium metal cells using LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 and Li CoO_2 cathodes(both loadings ～3.0 m Ah/cm~2) realize capacity retentions of >85% over 240 cycles with a charge cut-off voltage of 4.4 V and 90% for 170 cycles with a charge cut-off voltage of 4.5 V, respectively. This study offers a bifunctional ether-based electrolyte solvent beneficial for high-voltage Li metal batteries. |
| 文献子类 | CNKI期刊论文 |
| 资助机构 | the financial supports from the KeyArea Research and Development Program of Guangdong Province (2020B090919001) ; the National Natural Science Foundation of China (22078144) ; the Guangdong Natural Science Foundation for Basic and Applied Basic Research (2021A1515010138 and 2023A1515010686) |
| 卷 | v.88期:01页:549-559 |
| 语种 | 英文; |
| 分类号 | TM912;O646.1 |
| ISSN号 | 2095-4956 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/186933]  |
| 专题 | 中国科学院海洋研究所 |
| 作者单位 | 1.CALBGroupCo.,Ltd. 2.DepartmentofMaterialsScience&Engineering,SchoolofInnovationandEntrepreneurship,SouthernUniversityofScienceandTechnology 3.SchoolofGeography,EarthandEnvironmentalSciences,UniversityofBirmingham 4.KeyLaboratoryofMarineEnvironmentalCorrosionandBio-Fouling,InstituteofOceanology,ChineseAcademyofSciences 5.ShenzhenCAPCHEMTechnologyCo.,Ltd. |
| 推荐引用方式 GB/T 7714 | Ruo Wang,Jiawei Li,Bing Han,et al. Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries. 2023. |
入库方式： OAI收割
来源：海洋研究所
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