Abstract
Three types of inorganic electrolytes [Li10GeP2S12 (LGPS), 75Li2S·24P2S5·1P2O5 (LPOS), Li1.5Al0.5Ge1.5(PO4)3 (LAGP)] with different particle sizes and electrochemical properties are selected as active fillers incorporated into poly(ethylene oxide) (PEO) matrix to fabricate hybrid solid electrolytes. The optimum composition of each filler is found in consideration of ionic conductivity. Their electrochemical characteristics are investigated. The optimal conductivities are 1.60 × 10−5, 1.18 × 10−5, and 2.12 × 10−5 S cm−1 at room temperature for PEO-1%LGPS, PEO-1%LPOS, and PEO-20%LAGP, respectively. The electrochemical stability windows of these hybrid solid electrolytes are all above 5 V (vs. Li+/Li). The results show that these fillers have positive effects on the ionic conductivity, lithium ion transference number, and electrochemical stability. The relationship between the type of filler and electrochemical properties has been investigated. All-solid-state cells LiFePO4/Li are fabricated and present fascinating electrochemical performance with high capacity retention and good cycling stability. This work provides promising electrolytes prepared by a simple method.
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Acknowledgements
The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 51502317), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDA09010201 and XDA09010203), the Key Scientific and Technological Innovation Team Project of Zhejiang province (Grant No. 2013PT16), and Natural Science Foundation of Ningbo (Grant Nos. 2015A610238 and 2015A610027).
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Chen, S., Zhao, Y., Yang, J. et al. Hybrid solid electrolytes with excellent electrochemical properties and their applications in all-solid-state cells. Ionics 23, 2603–2611 (2017). https://doi.org/10.1007/s11581-016-1905-9
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DOI: https://doi.org/10.1007/s11581-016-1905-9