Synthesis of a polyacrylonitrile/tetrachloro-1,4-benzoquinone gel polymer electrolyte for high-performance Li-air batteries

Gel polymer electrolyte (GPE) is recently attracting a significant attention for lithium air batteries (LABs) due to better reliability compared with liquid type electrolyte and higher ionic conductivity compared with solid type electrolyte. In this paper, we report a new combination of polyacryloni...

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Veröffentlicht in:Journal of membrane science Jg. 563; S. 835 - 842
Hauptverfasser: Kim, Young Bok, Kim, Il To, Song, Myeong Jun, Shin, Moo Whan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 01.10.2018
Schlagworte:
air
ambient temperature
artificial membranes
batteries
benzoquinones
electric power
electrolytes
energy
Gel polymer electrolyte
gels
Li-air battery
liquids
lithium
Polyacrylonitrile
Tetrachloro-1,4-benzoquinone
Li-air battery
Polyacrylonitrile
Gel polymer electrolyte
Tetrachloro-1,4-benzoquinone
ISSN:0376-7388, 1873-3123
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Zusammenfassung:Gel polymer electrolyte (GPE) is recently attracting a significant attention for lithium air batteries (LABs) due to better reliability compared with liquid type electrolyte and higher ionic conductivity compared with solid type electrolyte. In this paper, we report a new combination of polyacrylonitrile (PAN)-based GPE with tetrachloro-1,4-benzoquinone (tCl-pBQ) as the redox mediator for the LAB application. The synthesized PAN/tCl-pBQ GPE with lithium bis (tri-fluoro-methane-sulfonyl)imide (LiTFSI)/tetraethylene glycol dimethyl ether (TEGDME) displays a decrease in the LAB charge voltage from ~ 4.2 to 3.6 V and a ~ 10% increase in energy cycle efficiency compared with PAN GPE without tCl-pBQ. The decrease in charge voltage improves the cyclability from 8 to 98 cycles. Structural analyses reveal that addition of tCl-pBQ accelerates the formation of an amorphous phase in the PAN-based gel polymer electrolyte matrix, improving the ionic conductivity from 7.64 to 12.5 mS cm−1 at room temperature. [Display omitted] •The PAN/tCl-pBQ composite GPE synthesized via casting method with electrospinning.•The redox mediator effect of tCl-pBQ was proved by cyclic voltammetry.•Using the PAN/tCl-pBQ GPE shows much improvement of cyclability for Li-air batteries.
Bibliographie:ObjectType-Article-1
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ISSN:0376-7388
1873-3123
DOI:10.1016/j.memsci.2018.06.023