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Thu Jun 27, 2013, 10:56 AM

No more leakage of explosive electrolyte in battery

http://www.unist.ac.kr/board/view.sko?menuCd=AB07002001000&boardId=Notice&dataSid=1791783&orderBy=register_dt
[font face=Serif][font size=5]No more leakage of explosive electrolyte in battery[/font]

Eunhee Song | 2013/06/28

[font size=3] Ulsan, South Korea, June 27, 2013 A research team at Ulsan National Institute of Science and Technology (UNIST), S. Korea, found a new physical organogel electrolyte with two unique characteristics: an irreversible thermal gelation and a high value of the Li[small][sup]+[/sup][/small] transference number.

A Recent fire on a Boeing 787 on the ground in Boston, US, was caused by a battery failure, it resulted in the release of flammable electrolytes, heat damage and smoke. If they had used a safer electrolyte, the risk would have been reduced.



The research team of Profs. Hyun-Kon Song and Noejung Park of UNIST, presented an organogel polymer electrolyte characterized by a high liquid-electrolyte-level ionic conductivity with high a cationic transference number for Lithium ion batteries (LIB).

The research team acquired the two required properties simultaneously in polymer gel electrolytes: a liquid-electrolyte-level conductivity with a high transference number. Cyanoethly polyvinyle alchohol (PVA-CN) played a key role in the highly conductive gel electrolyte while another cyano resin, Cyanoethlyle pullulan (Pullulan-CN), was used as a control representing a liquid electrolyte containing cyano chains. The PVA-CN-containing liquid electrolyte was thermally gelated even without any chemical crosslinkers or polymerizations initiators.

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http://dx.doi.org/10.1038/srep01917

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