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Homogeneous and Fast Ion Conduction of PEO-Based Solid-State Electrolyte at Low Temperature
Xu, Shengjun; Sun, Zhenhua; Sun, Chengguo; Li, Fan; Chen, Ke; Zhang, Zhihao; Hou, Guangjin; Cheng, Hui-Ming; Li, Feng
2020-12-01
Source PublicationADVANCED FUNCTIONAL MATERIALS
Volume30Issue:51
AbstractPoly(ethylene oxide) (PEO)-based electrolytes are promising for all-solid-state batteries but can only be used above room temperature due to the high-degree crystallization of PEO and the intimate affinity between ethylene oxide (EO) chains and lithium ions. Here, a homogeneous-inspired design of PEO-based solid-state electrolytes with fast ion conduction is proposed. The homogeneous PEO-based solid-state electrolyte with an adjusted succinonitrile (SN) and PEO molar ratio simultaneously suppresses the PEO crystallization and mitigates the affinity between EO and Li+. By adjusting the molar ratio of SN to PEO (SN:EO approximate to 1:4), channels providing fast Li(+)transport are formed within the homogeneous solid-state polymer electrolyte, which increases the ionic conductivity by 100 times and enables their application at a low temperature (0-25 degrees C), together with the uniform lithium deposition. This modified PEO-based electrolyte also enables a LiFePO(4)cathode to achieve a superior Coulombic efficiency (>99%) and have a long life (>750 cycles) at room temperature. Moreover, even at a low temperature of 0 degrees C, 82% of its room-temperature capacity remains, demonstrating the great potential of this electrolyte for practical solid-state lithium battery applications.
DOI10.1002/adfm.202007172
WOS IDWOS:000569824500001
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82523
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Xu, Shengjun,Sun, Zhenhua,Sun, Chengguo,et al. Homogeneous and Fast Ion Conduction of PEO-Based Solid-State Electrolyte at Low Temperature[J]. ADVANCED FUNCTIONAL MATERIALS,2020,30(51).
APA Xu, Shengjun.,Sun, Zhenhua.,Sun, Chengguo.,Li, Fan.,Chen, Ke.,...&Li, Feng.(2020).Homogeneous and Fast Ion Conduction of PEO-Based Solid-State Electrolyte at Low Temperature.ADVANCED FUNCTIONAL MATERIALS,30(51).
MLA Xu, Shengjun,et al."Homogeneous and Fast Ion Conduction of PEO-Based Solid-State Electrolyte at Low Temperature".ADVANCED FUNCTIONAL MATERIALS 30.51(2020).
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