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Single Lithium‐ion Solid Conductors Based on Tetrazolate Anion and −Si−O− Species with Polyethylene Glycol Chains
Author(s) -
Fei Yuqing,
Liu Shimin,
Long Yan,
Lu Liujin,
He Yude,
Ma Xiangyuan,
Deng Youquan
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900274
Subject(s) - electrochemistry , materials science , polyethylene glycol , x ray photoelectron spectroscopy , fourier transform infrared spectroscopy , ion , lithium (medication) , chemical engineering , electrode , inorganic chemistry , polymer chemistry , chemistry , organic chemistry , medicine , engineering , endocrinology
New organic‐inorganic hybrid single lithium‐ion (Li + ) conductors (SLICs) based on tetrazolate anion and −Si−O− species with polyethylene glycol (PEG) chains were developed using isocyanate as interim connection. The key design strategy is that the longer and freely movable wirelike PEG chain can improve Li + transfer in the presence of a high charge delocalized tetrazolate anion, and the −Si−O− species might improve the interfacial stability at the Li anode. FTIR, solid‐state NMR, XPS, XRD, BET, TGA, and DSC experiments were performed and the electrochemical properties were tested. The chemical structure and basic physicochemical properties were confirmed and revealed preliminarily. At 30 °C, a high enough conductivity (3.3×10 −6 S cm −1 ), Li + transference number (0.86), and wide electrochemical window (4.5 V) were obtained from the pure SLIC based on PEG with molecular weight of 600 g mol −1 . Besides, the developed SLICs displayed good interfacial compatibility with the Li metal electrode, as expected.