Effects of Bulky LATP in PEO-based Hybrid Solid Electrolytes

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摘要 Solid polymer electrolytes (SPEs) have been considered as the spotlight in recent years due to their high safety, non-flammability and good flexibility. Nonetheless, high crystallinity of polymer matrix leads to low ionic conductivity at ambient conditions and retards the practical applications of SPEs. Herein, we report hybrid solid electrolytes (HSE) containing bulky LATP in poly(ethylene oxide) (PEO) matrix, which significantly enhances the electrochemical properties. LATP has been easily obtained by an accessible solid-state method. The solid electrolyte based on 20 wt% LATP in PEO polymer matrix (abbreviated as PEO-20) exhibits an ionic conductivity of 2.1 ×10–5 S·cm–1 at 30 oC, an order of magnitude higher than 2.9 × 10–6 S·cm–1 of the pristine PEO solid electrolyte (abbreviated as PEO–0), mainly resulting from the decline of crystallinity in polymer matrix. The electrochemical window of PEO-20 can reach 4.84 V at room temperature, compared with 4.40 V for PEO-0, which could be compatible with high-voltage cathode materials.

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	薛熙来
	张祥昕
	林俊鸿
	陈素晶
	陈远强
	刘永川
	张易宁

关键词 ： hybrid solid electrolytes, bulky LATP, polyethylene oxide

Abstract：Solid polymer electrolytes (SPEs) have been considered as the spotlight in recent years due to their high safety, non-flammability and good flexibility. Nonetheless, high crystallinity of polymer matrix leads to low ionic conductivity at ambient conditions and retards the practical applications of SPEs. Herein, we report hybrid solid electrolytes (HSE) containing bulky LATP in poly(ethylene oxide) (PEO) matrix, which significantly enhances the electrochemical properties. LATP has been easily obtained by an accessible solid-state method. The solid electrolyte based on 20 wt% LATP in PEO polymer matrix (abbreviated as PEO-20) exhibits an ionic conductivity of 2.1 ×10–5 S·cm–1 at 30 oC, an order of magnitude higher than 2.9 × 10–6 S·cm–1 of the pristine PEO solid electrolyte (abbreviated as PEO–0), mainly resulting from the decline of crystallinity in polymer matrix. The electrochemical window of PEO-20 can reach 4.84 V at room temperature, compared with 4.40 V for PEO-0, which could be compatible with high-voltage cathode materials.

Key words： hybrid solid electrolytes bulky LATP polyethylene oxide

收稿日期: 2020-01-15 出版日期: 2020-11-09

基金资助:Financially supported from the Fujian Provincial Science and Technology Program (No. 2018H0042, 2019T3017),Putian Municipal Science and Technology Program (2019HJSTS009) and the DNL Cooperation Fund, CAS (DNL180308)

通讯作者: ynzhang@fjirsm.ac.cn E-mail: ynzhang@fjirsm.ac.cn

引用本文:

薛熙来;张祥昕;林俊鸿;陈素晶;陈远强;刘永川;张易宁. Effects of Bulky LATP in PEO-based Hybrid Solid Electrolytes[J]. 结构化学, 2020, 39(11): 1941-1948.
XUE Xi-Lai;ZHANG Xiang-Xin;LIN Jun-Hong;CHEN Su-Jing;CHEN Yuan-Qiang;LIU Yong-Chuan;ZHANG Yi-Ning. Effects of Bulky LATP in PEO-based Hybrid Solid Electrolytes. CHINESE JOURNAL OF STRUCTURAL CHEMISTRY, 2020, 39(11): 1941-1948.

链接本文:

http://manu30.magtech.com.cn/jghx/CN/ 或 http://manu30.magtech.com.cn/jghx/CN/Y2020/V39/I11/1941

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