期刊
JOURNAL OF POWER SOURCES
卷 489, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.229431
关键词
Pouch-type; Hybrid Li-air battery; Flexible composite lithium-ion conducting membrane; LATP; PVDF-HFP
资金
- Ministry of Science and Technology, Taiwan, R.O.C [MOST 108-2221-E-182 -037, MOST 109-2221-E-182-011-MY3]
The use of a flexible composite lithium-ion conducting membrane enables the realization of a flexible pouch-type hybrid Li-air battery, overcoming the difficulties of assembling traditional Li-air batteries into flexible devices.
Pouch-type hybrid Li-air batteries with an air-breathing ability and lightweight packaging provide improved specific energy compared with commercial Li-ion batteries and Li-O-2 batteries that require oxygen supply equipment. Because ceramic Li-ion conductors, used to separate aprotic and aqueous electrolytes, are brittle and inflexible, hybrid Li-air batteries are difficult to assemble into pouch cells for use in flexible device applications. A flexible pouch-type hybrid Li-air battery is realized by utilizing a flexible composite lithium-ion conducting membrane (FCLICM). This FCLICM, consisting of sol-gel-derived Li1+xAlxTi2-x(PO4)(3) (LATP) as a Li-ion conductor and a chemically compatible poly (vinylidene fluoride-co-hexafluompropylene) (PVDF-HFP) polymer matrix, is produced by the tape-casting technique and applied in hybrid Li-air batteries. An assembled pouch-type hybrid Li-air battery containing a lithium foil anode, an aprotic electrolyte, an FCLICM, an aqueous electrolyte and a platinum air cathode is operated in ambient air, exhibiting a high capacity of 200 mAh g(-1) with a cycle life of 12 cycles (48 h). This pouch cell shows an open-circuit voltage of 3.16 V regardless of being flat or bent, demonstrating its flexibility and electrochemical stability and its potential for use in wearable technology.
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