講演情報
[20p-P07-27]Application of gel polymer electrolytes and flexible composite lithium ion conducting membranes in hybrid electrolyte lithium air batteries
〇(M1)Chang YuHsuan1, Tsai WanTing1, Yu YenHsiang1, Lu HsinChun1 (1.Chang Gung Univ.)
キーワード：
fiexible composite lithium ion conduction membranes、gel polymer electrolytes
This research focuses on the development and application of gel polymer electrolytes(GPEs) and flexible composite lithium-ion conducting membranes(FCLICMs) in hybrid electrolyte lithium-air batteries(HELABs). FCLICMs were fabricated by incorporating inorganic fillers into polymer matrices. Among the fillers tested, FCLICMs with 50 wt% nanosheets of Al2O3 exhibited superior properties, including permeability and ion conductivity. These FCLICMs possessed a permeability of 5.06×10−7 cm2/s and an ion conductivity of 6.05×10−6 S/cm, with a thickness of approximately 81 μm. Coin-type HELABs utilizing FCLICMs with 50 wt% Al2O3 achieved a specific capacity of 500 mAh/g and a cycle life of 70 h when cyclically discharged and charged for 5 h each under a self-breathing mode with a current density of 0.1 mA/cm2 in an open atmosphere. On the other hand, GPEs were prepared using poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP), lithium bis(trifluoromethane sulfonyl)imide(LiTFSI), and tetramethylene glycol dimethyl ether(TEGDME). These GPEs were designed to overcome issues related to the swelling of FCLICMs, which led to the deterioration of the lithium anode and HELAB failure. The GPEs achieved a maximum ionic conductivity of 2.43×10−3 S/cm at room temperature. Coin-type HELABs, constructed with a specific configuration, demonstrated a cycle life of 80 h when cyclically discharged and charged for 5 h each under a self-breathing mode and a current density of 0.05 mA/cm2. These findings demonstrate the successful development and application of FCLICMs and GPEs in HELABs. The GPEs addressed the swelling issues of FCLICMs, while the incorporation of inorganic fillers enhanced the properties of the FCLICMs. Coin-type HELABs exhibited promising cycle lives and specific capacities under various discharge and charge conditions. These advancements in electrolytes and membranes contribute to the potential of achieving flexible and high-energy lithium-air batteries.