Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.15Al0.05O2 electrode | |
Zhang, Feilong1,2; Wang, Chao1; Zhao, Dongni1; Yang, Li1; Wang, Peng1; Li, Wenbo1; Wang, Bo1; Li, Shiyou1,2 | |
2020-03-20 | |
发表期刊 | Electrochimica Acta |
ISSN | 00134686 |
卷号 | 337 |
摘要 | High nickel LiNi0.8Co0.15Al0.05O2 (NCA) cathode material has become one of the most promising cathode materials in the field of power batteries, but the side reaction between the conventional LiPF6-based electrolyte and the surface of the NCA material results in poor material interface stability. In this work, a compatible lithium difluoro(oxalate)borate (LiDFOB)-based electrolyte by the employment of sulfolane (SL) as a representative sulfur-containing solvent has been built to enhance the interfacial stability of NCA electrode. The composition, morphology and electrochemical properties are studied by X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy et al. Results show that the decomposition of LiDFOB on the surface of the positive electrode material contributes to forming a uniform cathode electrolyte interface (CEI) film, which subsequently reduces the dissolution of metal ions and hinders the structure transition of the material from the layered structure to spinel or rock-salt phases. Besides, the sulfur-containing products resulted from the decomposition of SL promote the conductivity of Li+ ions for CEI film, which makes up for shortcomings of LiDFOB. Moreover, more LiF has been formed due to the synergistic action between LiDFOB salt and SL solvent, improving the stability and density of CEI film, reducing the thickness of CEI film, and further improving the cycle performance of the battery. © 2020 Elsevier Ltd |
关键词 | Aluminum compounds Cathode materials Cathodes Electrolytes High resolution transmission electron microscopy Interfaces (materials) Lithium-ion batteries Metal ions Metals Morphology Nickel compounds Oxalic acid Scanning electron microscopy Stability Sulfur X ray photoelectron spectroscopy Electrolyte interfaces Interfacial stabilities LiNi0.8Co0.15Al0.05O2 Material interfaces Positive electrode materials Structure transitions Sulfolane Synergistic effect |
DOI | 10.1016/j.electacta.2020.135727 |
收录类别 | EI ; SCIE |
语种 | 英语 |
WOS研究方向 | Electrochemistry |
WOS类目 | Electrochemistry |
WOS记录号 | WOS:000521531700070 |
出版者 | Elsevier Ltd |
EI入藏号 | 20200608149639 |
EI主题词 | Lithium compounds |
EI分类号 | 531.1 Metallurgy - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 804.1 Organic Compounds - 951 Materials Science |
来源库 | Compendex |
分类代码 | 531.1 Metallurgy - 741.3 Optical Devices and Systems - 804 Chemical Products Generally - 804.1 Organic Compounds - 951 Materials Science |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/115235 |
专题 | 石油化工学院 马克思主义学院 图书馆 |
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 | Zhang, Feilong,Wang, Chao,Zhao, Dongni,et al. Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.15Al0.05O2 electrode[J]. Electrochimica Acta,2020,337. |
APA | Zhang, Feilong.,Wang, Chao.,Zhao, Dongni.,Yang, Li.,Wang, Peng.,...&Li, Shiyou.(2020).Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.15Al0.05O2 electrode.Electrochimica Acta,337. |
MLA | Zhang, Feilong,et al."Synergistic effect of sulfolane and lithium Difluoro(oxalate)borate on improvement of compatibility for LiNi0.8Co0.15Al0.05O2 electrode".Electrochimica Acta 337(2020). |
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