Iron oxyfluorides as lithium-free cathode materials for solid-state Li metal batteries

High energy density storage systems can be achieved by utilizing a lithium metal anode in solid-state Li secondary batteries. Herein, we report for the first time the use of a lithium-free cathode coupled with lithium metal for solid-state Li metal batteries. This lithium-free cathode composed of ir...

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Published inJournal of materials chemistry. A, Materials for energy and sustainability Vol. 5; no. 35; pp. 18464 - 18468
Main Authors Wang, Li-Ping, Wang, Tai-Shan, Zhang, Xu-Dong, Liang, Jia-Yan, Jiang, Li, Yin, Ya-Xia, Guo, Yu-Guo, Wang, Chun-Ru
Format Journal Article
LanguageEnglish
Published 2017
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Summary:High energy density storage systems can be achieved by utilizing a lithium metal anode in solid-state Li secondary batteries. Herein, we report for the first time the use of a lithium-free cathode coupled with lithium metal for solid-state Li metal batteries. This lithium-free cathode composed of iron oxyfluoride (FeOF) nanorods can not only reduce the consumption of lithium resources, but also provide a good electrochemical performance. After being encapsulated by a highly conductive poly(3,4-ethylenedioxythiophene) (PEDOT) nanolayer, the coated FeOF nanorods exhibit a superior cycling stability ( ca. 75% capacity retention after 200 cycles at 100 mA g −1 ) at 60 °C in a PEA solid electrolyte. This performance demonstrates the great potential of lithium-free cathodes for application in solid-state Li metal batteries.
ISSN:2050-7488
2050-7496
DOI:10.1039/C7TA05138G