Journal
NANO ENERGY
Volume 46, Issue -, Pages 176-184Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2017.12.037
Keywords
Composite solid electrolytes; Solid-state Lithium batteries; Polyethylene oxide; Garnet; Flexible membrane
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Funding
- Beijing Natural Science Foundation [L172023]
- Natural Scientific Foundation of China [51532002]
- National Basic Research Program of China [2015CB932500]
- Office of Vehicle Technologies of the U.S. Department of Energy through the Advanced Battery Materials Research (BMR) Program (Battery500 Consortium) [DE-EE0007762]
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Composite polyethylene-oxide/garnet electrolytes containing LiTFSI as the lithium salt have a Li+ conductivity sigma(Li) > 10(-4) S cm(-1) at 55 degrees C and a low plating/stripping impedance of a dendrite-free Li-metal anode; they have been developed for a safe solid-state Li-metal rechargeable battery. Composites consisting of ceramic-in-polymer to polymer-in-ceramic that are flexible and mechanically robust are fabricated by hot-pressing. Safe pouch cells with a remarkable flexibility have been fabricated. Solid-state LiFePO4 vertical bar Li batteries with electrolytes of ceramic-in-polymer and polymer-in-ceramic deliver excellent cycling stability with high discharge capacities (139.1 mAh g(-1) with capacity retention of 93.6% after 100 cycles) and high capacity retention (103.6% with coulombic efficiency of 100% after 50 cycles) at 0.2 C and 55 degrees C. Both kinds of electrolytes can be applied to solid-state lithium batteries.
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