Improving room-temperature electrochemical performance of solid-state lithium battery by using electrospun La2Zr2O7 fibers-filled composite solid electrolyte
| Autor: | Chong Han, Hua Yang, Fei-yue Tu, Wei-yong Yuan, Qin Shibiao, Maoxiang Jing, Bo-wei Ju, Xiangqian Shen, Fei Chen |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology 02 engineering and technology Electrolyte engineering.material 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Lithium battery Electrospinning Surfaces Coatings and Films Electronic Optical and Magnetic Materials Anode Coating Chemical engineering 0103 physical sciences Materials Chemistry Ceramics and Composites engineering Fast ion conductor Ionic conductivity 0210 nano-technology |
| Zdroj: | Ceramics International. 45:18614-18622 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.06.085 |
| Popis: | Low ionic conductivity at room temperature and poor interfacial compatibility are the main obstacles to restrain the practical application of polymer solid electrolytes. In this work, lanthanum zirconate (LZO) fibers were prepared by electrospinning method and used for the first time as fillers in sandwich polypropylene carbonate (PPC)-based solid electrolyte. Meanwhile, a graphite coating was applied on one surface of the composite solid electrolyte (CSE) membrane. The results show that the LZO fibers significantly increases the room-temperature electrochemical performance of the CSE, and the graphite coating enhances the interfacial compatibility between electrolyte and lithium anode. Furthermore, an ultra-thin PPC-LZO CSE with a total thickness of 22 μm was prepared and used in NCM622/CSE/Li solid-state cell, which shows an initial discharge capacity of 165.6 mAh/g at the current density of 0.5C and a remaining capacity of 113.0 mAh/g after 250 cycles at room temperature. Rise to 1C, the cell shows an initial discharge capacity of 154.2 mAh/g with a remaining capacity of 95.6 mAh/g after 250 cycles. This ultra-thin CSE is expected to be widely applied in high energy-density solid-state battery with excellent room-temperature electrochemical performances. |
| Databáze: | OpenAIRE |
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