Study on boron-containing electrolytes at extra-high temperatures for lithium-ion batteries | |
Yang, Li1; Wang, Peng1; Zhao, Dongni1; Wei, Yuan1; Han, Yamin1; Zeng, Shuangwei1; Wang, Chao1; Li, Shiyou1,2 | |
2020-08-01 | |
发表期刊 | Sustainable Energy and Fuels |
ISSN | 2398-4902 |
卷号 | 4期号:8页码:4126-4136 |
摘要 | Broadening the temperature range of lithium-ion batteries can be achieved by optimizing the composition of lithium salts in the electrolyte, which is currently one of the most popular methods. In this study, we report an extra-high temperature electrolyte by optimizing the proportion of mixed lithium salts (LiBOB and LiBF4) with ethylene carbonate (EC), diethyl carbonate (DEC) and ethyl methyl (EMC) as an equal volume mixture. An extra-high temperature of 75 °C is applied in a half cell with lithium iron phosphate (LFP) as the cathode and a lithium foil as the anode. The cycle stability and rate performance of the cell with various electrolytes based on mixed lithium salts are systematically investigated and a comparison of the polarization and impedance characteristics is conducted as well. The most outstanding electrolyte composition is electrolyte B (0.6 M LiBOB + 0.1 M LiBF4-EC/DEC/EMC). The optimized electrolyte not only maintains good cycle stability (the capacity retention rate is 98% after 80 cycles) and excellent rate performance at the extra-high temperature, but also minimizes the polarization during cycling, which is mainly due to the formation of a dense and smooth cathode electrolyte interface (CEI) film, as observed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The CEI film that contains B-O bonds and organic components is systematically analyzed by energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS), which shows that the components aid the extra-high temperature cycling stability of the cell. Our data indicate that the composition of lithium salts in the electrolyte is pivotal to the properties of the CEI film, which largely determines the performance of the cell at extra-high temperatures. The conclusions of this work can contribute significantly to the application of extra-high temperature electrolytes. © 2020 The Royal Society of Chemistry. |
关键词 | Boron Cathodes Cells Cytology Electrolytes Energy dispersive spectroscopy Ethylene High resolution transmission electron microscopy Iron compounds Lithium compounds Polarization Salts Scanning electron microscopy X ray photoelectron spectroscopy Electrolyte compositions Electrolyte interfaces Energy dispersive X ray spectroscopy High temperature cycling High-temperature electrolyte Impedance characteristics Lithium iron phosphates Organic components |
DOI | 10.1039/d0se00529k |
收录类别 | SCI ; SCIE ; EI |
语种 | 英语 |
WOS研究方向 | Chemistry ; Energy & Fuels ; Materials Science |
WOS类目 | Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary |
WOS记录号 | WOS:000552930600029 |
出版者 | Royal Society of Chemistry |
EI入藏号 | 20203309050040 |
EI主题词 | Lithium-ion batteries |
EI分类号 | 461.2 Biological Materials and Tissue Engineering - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 702 Electric Batteries and Fuel Cells - 741.3 Optical Devices and Systems - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds |
来源库 | Compendex |
分类代码 | 461.2 Biological Materials and Tissue Engineering - 549.3 Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals - 702 Electric Batteries and Fuel Cells - 741.3 Optical Devices and Systems - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.1 Organic Compounds |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/115336 |
专题 | 石油化工学院 马克思主义学院 |
通讯作者 | Li, Shiyou |
作者单位 | 1.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China; 2.Gansu Engn Lab Electrolyte Mat Lithium Ion Batter, Lanzhou 730050, Peoples R China |
第一作者单位 | 石油化工学院 |
通讯作者单位 | 石油化工学院 |
第一作者的第一单位 | 石油化工学院 |
推荐引用方式 GB/T 7714 | Yang, Li,Wang, Peng,Zhao, Dongni,et al. Study on boron-containing electrolytes at extra-high temperatures for lithium-ion batteries[J]. Sustainable Energy and Fuels,2020,4(8):4126-4136. |
APA | Yang, Li.,Wang, Peng.,Zhao, Dongni.,Wei, Yuan.,Han, Yamin.,...&Li, Shiyou.(2020).Study on boron-containing electrolytes at extra-high temperatures for lithium-ion batteries.Sustainable Energy and Fuels,4(8),4126-4136. |
MLA | Yang, Li,et al."Study on boron-containing electrolytes at extra-high temperatures for lithium-ion batteries".Sustainable Energy and Fuels 4.8(2020):4126-4136. |
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