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A promising composite room temperature solid electrolyte via incorporating LLZTO into cross-linked ETPTA/PEO/SN matrix for all solid state lithium batteries
Li, Bangxing1,2,3; Yi, Xianlin1; Xie, Zhenjun4; Wu, Fei1; Kang, Xing1; Kang, Shuai5; Hu, Xiaolin1
2024-02-23
摘要Composite solid electrolyte (CSE), especially the composite room temperature solid electrolyte (CRTSE), is emerging as the promising electrolyte for all-solid-state lithium batteries (ASSLB) due to their ability to combine the desirable properties of ceramic and polymer-based electrolytes and the room temperature operation condition. In this paper, the CRTSE with polyethylene oxide (PEO), bis(fluorosulfonyl)imide (LiTFSI), succinonitrile (SN), LLZTO inorganic fillers, and cross-linked ethoxylated trimethylolpropane triacrylate (ETPTA) was proposed. With the help of lithium dendrite suppression via cross-linked microscopic pore structure, enhancement of the ionic conductivity via LLZTO fillers, and wide electrochemical window via SN, the obtained LCSE showed high ionic conductivity (2.12 x 10-4 S cm-1), high Li+ transfer number (tLi+ = 0.55), and stable electrochemical window (5.0 V vs Li/Li+) at room temperature. The Li symmetrical cell with LCSE can cycle over 500 h stably with current density of 0.1 mA cm-2 and 0.5 mA cm-2 at room temperature. The full solid-state LiFePO4 cell can successfully work over 200 cycles with capacity retention ratio of about 70% at room temperature.
关键词Composite solid electrolyte All solid-state lithium batteries UV curing Room temperature
DOI10.1007/s11581-024-05451-2
发表期刊IONICS
ISSN0947-7047
页码11
通讯作者Li, Bangxing(bangxingli@163.com) ; Yi, Xianlin(1079677826@qq.com) ; Hu, Xiaolin(huxl@cqut.edu.cn)
收录类别SCI
WOS记录号WOS:001169382100001
语种en