In-situ EC-AFM and ex-situ XPS characterization to investigate the mechanism of SEI formation in highly concentrated aqueous electrolyte for Li-ion batteries
文献类型：期刊论文
| 作者 | Zhang, Haitao; Wang, Deyu; Shen, Cai |
| 刊名 | APPLIED SURFACE SCIENCE
 |
| 出版日期 | 2020 |
| 卷号 | 507 |
| 关键词 | ELECTROCHEMICAL-BEHAVIOR HIGH-ENERGY CARBONATE WATER GRAPHITE OPERANDO PROGRESS INSIGHT |
| DOI | 10.1016/j.apsusc.2019.145059 |
| 英文摘要 | The structure and chemical composition of solid electrolyte interphase (SEI) play a critical role in the performance of Li-ion batteries. However, the complexity of SEI layer and lack of relevant and efficient characterization techniques limit understanding of SEI formation mechanism and associated properties. Moreover, compared with organic electrolyte-based SEI, few studies have focused on aqueous electrolyte-based solid-electrolyte interphase (A-SEI). Herein, we present in-situ AFM images to demonstrate the morphological evolution of SEI in the presence of 21M lithium bis(trifluoromethane sulfonyl) imide (LiTFSI) aqueous electrolyte. Moreover, a combination of electrochemical-controlled atomic force microscopy (EC-AFM) and ex-situ X-ray photoelectron spectroscopy (XPS) is utilized to unveil the mechanism of SEI formation and identify its components. The results reveal that A-SEI layer is unevenly distributed and the inner and outer layers are mainly composed of Li2CO3 and LiF, respectively. The Young's modulus of 4-6 nm thick SEI layer is found to be 30 +/- 10 GPa. The current study provides novel insights into the formation of A-SEI by using in-situ AFM and provides a baseline for the future development of aqueous electrolytes for Li-ion batteries. |
| 学科主题 | Chemistry ; Materials Science ; Physics |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/19849]  |
| 专题 | 2020专题 2020专题_期刊论文 |
| 作者单位 | Shen, C (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, 1219 Zhongguan Rd, Ningbo 315201, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Zhang, Haitao,Wang, Deyu,Shen, Cai. In-situ EC-AFM and ex-situ XPS characterization to investigate the mechanism of SEI formation in highly concentrated aqueous electrolyte for Li-ion batteries[J]. APPLIED SURFACE SCIENCE,2020,507. |
| APA | Zhang, Haitao,Wang, Deyu,&Shen, Cai.(2020).In-situ EC-AFM and ex-situ XPS characterization to investigate the mechanism of SEI formation in highly concentrated aqueous electrolyte for Li-ion batteries.APPLIED SURFACE SCIENCE,507. |
| MLA | Zhang, Haitao,et al."In-situ EC-AFM and ex-situ XPS characterization to investigate the mechanism of SEI formation in highly concentrated aqueous electrolyte for Li-ion batteries".APPLIED SURFACE SCIENCE 507(2020). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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