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DOI	10.1039/d0ee00342e
	Determining the limiting factor of the electrochemical stability window for PEO-based solid polymer electrolytes: Main chain or terminal -OH group?
	Yang X.; Jiang M.; Gao X.; Bao D.; Sun Q.; Holmes N.; Duan H.; Mukherjee S.; Adair K.; Zhao C.; Liang J.; Li W.; Li J.; Liu Y.; Huang H.; Zhang L.; Lu S.; Lu Q.; Li R.; Singh C.V.; Sun X.
发表日期	2020
ISSN	17545692
起始页码	1318
结束页码	1325
卷号	13 期号:5
英文摘要	Due to higher energy density, high-voltage all-solid-state lithium batteries (ASSLBs) have attracted increasing attention. However, they require solid-state electrolytes (SSEs) with wide electrochemical stability windows (ESW, typically >4.2 V) and high-stability against the Li anode. Nevertheless, poly(ethylene oxide) (PEO), the most widely used solid polymer electrolyte (SPE), can't tolerate a high-voltage over 4 V. Whether the main chain (-C-O-C-) or the terminal hydroxide group (-OH) is the limiting factor for the narrow ESW remains unknown. Herein, poly(ethylene glycol) (PEG) and poly(ethylene glycol)dimethyl ether (PEGDME) with different terminal groups are selected to answer this question. The results show that the reactive terminal -OH group is the limiting factor towards applicability against high voltage and the Li anode. Replacing -OH with more stable -OCH3 can significantly extend the ESW from 4.05 to 4.3 V, while improving the Li-anode compatibility as well (Li-Li symmetric cells stably run for 2500 h at 0.2 mA cm-2). Its practical application is further proved by developing PEGDME-based ASSLB pouch cells. The 0.53 mA cm-2 Li-LiFePO4 and 0.47 mA h cm-2 Li-LiNi0.5Mn0.3Co0.2O2 cells demonstrated high capacity retention of 97% and 90% after 210 cycles and 110 cycles, respectively. This work offers a new strategy for PEO-based high-voltage ASSLB development by changing the unstable terminal groups. © The Royal Society 2020 of Chemistry.
英文关键词	Aliphatic compounds; Anodes; Binary alloys; Cobalt compounds; Ethylene; Ethylene glycol; Fuels; Iron compounds; Lithium; Lithium batteries; Lithium compounds; Manganese compounds; Nickel compounds; Polyelectrolytes; Polyethylene glycols; Polyethylene oxides; Polyols; Solid-State Batteries; All-solid-state lithium battery; Electrochemical stabilities; Higher energy density; Hydroxide groups; Poly (ethylene oxide) (PEO); Poly(ethylene glycol) dimethyl ethers (PEGDME); Solid polymer electrolytes; Solid-state electrolyte; Solid electrolytes; chemical bonding; electrochemical method; electrochemistry; electrolyte; hydroxyl radical; polymer
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189721
作者单位	Department of Mechanical and Materials Engineering, University of Western Ontario, London, ON N6A 5B9, Canada; Department of Materials Science and Engineering, University of Toronto, Toronto, ON M5S 3E4, Canada; Glabat Solid-State Battery Inc., 700 Collip Circle, London, ON N6G 4X8, Canada; China Automotive Battery Research Institute, Beijing, 100088, China
推荐引用方式 GB/T 7714	Yang X.,Jiang M.,Gao X.,et al. Determining the limiting factor of the electrochemical stability window for PEO-based solid polymer electrolytes: Main chain or terminal -OH group?[J],2020,13(5).
APA	Yang X..,Jiang M..,Gao X..,Bao D..,Sun Q..,...&Sun X..(2020).Determining the limiting factor of the electrochemical stability window for PEO-based solid polymer electrolytes: Main chain or terminal -OH group?.Energy & Environmental Science,13(5).
MLA	Yang X.,et al."Determining the limiting factor of the electrochemical stability window for PEO-based solid polymer electrolytes: Main chain or terminal -OH group?".Energy & Environmental Science 13.5(2020).