期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 39, 页码 22462-22471出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ta05015j
关键词
-
资金
- Swedish Foundation for Strategic Research (project SOLID ALIBI) [139501338]
- Batteries Sweden (BASE)
- STandUP for Energy
- Swedish Research Council [2018-05336]
- Swedish Research Council [2018-05336] Funding Source: Swedish Research Council
This study investigates the stability of three different solid polymer electrolytes (PEO, PCL, and PTMC) with lithium metal (LiTFSI), identifying a competing degradation phenomenon under different polymer hosts with the PTMC:LiTFSI system showing the most severe decomposition. The movement of lithium species through the decomposed interface also shows significant variation depending on the polymer electrolyte system.
Development of functional and stable solid polymer electrolytes (SPEs) for battery applications is an important step towards both safer batteries and for the realization of lithium-based or anode-less batteries. The interface between the lithium and the solid polymer electrolyte is one of the bottlenecks, where severe degradation is expected. Here, the stability of three different SPEs - poly(ethylene oxide) (PEO), poly(epsilon-caprolactone) (PCL) and poly(trimethylene carbonate) (PTMC) - together with lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) salt, is investigated after they have been exposed to lithium metal under UHV conditions. Degradation compounds, e.g. Li-O-R, LiF and LixSyOz, are identified for all SPEs using soft X-ray photoelectron spectroscopy. A competing degradation between polymer and salt is identified in the outermost surface region (<7 nm), and is dependent on the polymer host. PTMC:LiTFSI shows the most severe decomposition of both polymer and salt followed by PCL:LiTFSI and PEO:LiTFSI. In addition, the movement of lithium species through the decomposed interface shows large variation depending on the polymer electrolyte system.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据