1. A non-Newtonian fluid quasi-solid electrolyte designed for long life and high safety Li-O2 batteries.
- Author
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Zheng, Guangli, Yan, Tong, Hong, Yifeng, Zhang, Xiaona, Wu, Jianying, Liang, Zhenxing, Cui, Zhiming, Du, Li, and Song, Huiyu
- Subjects
SUPERIONIC conductors ,NON-Newtonian fluids ,LITHIUM-air batteries ,ELECTROLYTES ,SILICA nanoparticles ,LITHIUM cells ,POLYELECTROLYTES ,POLYMER networks - Abstract
The Li dendrite growth and the liquid electrolyte volatilization under semi-open architecture are intrinsic issues for Li-O
2 battery. In this work, we propose a non-Newtonian fluid quasi-solid electrolyte (NNFQSE) SiO2 -SO3 Li/PVDF-HFP, which has both shear-thinning and shear-thickening properties. The component interactions among the sulfonated silica nanoparticles, liquid electrolyte, and polymer network are beneficial for decent Li+ conductivity and high liquid electrolyte retention without volatilization. Furthermore, NNFQSE exhibits shear-thinning property to eliminate the stress of dendrite growth during repeated cycling. Meanwhile, when the force suddenly increases, such as a high current rate, the NNFQSE may dynamically turn shear-thickening to respond and mechanically stiffen to inhibit the lithium dendrite penetration. By coupling with the NNFQSE, the lithium symmetrical battery can run over 2000 h under 1 mA cm−2 at room temperature, and the quasi-solid Li-O2 battery actualizes long life above 5000 h at 100 mA g−1 . Lithium dendrite growth and liquid electrolyte volatilization limit the further development of lithium-oxygen batteries. Here, authors report a non-Newtonian fluid quasi-solid electrolyte to address those issues, which improve the life duration of the lithium-oxygen batteries. [ABSTRACT FROM AUTHOR]- Published
- 2023
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