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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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Nitrile-assistant eutectic electrolytes for cryogenic operation of lithium ion batteries at fast charges and discharges

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dc.contributor.author Cho, Yoon-Gyo ko
dc.contributor.author Kim, Young-Soo ko
dc.contributor.author Sung, Dong-Gil ko
dc.contributor.author Seo, Myung-Su ko
dc.contributor.author Song, Hyun-Kon ko
dc.date.available 2014-05-23T04:21:42Z -
dc.date.created 2014-05-07 ko
dc.date.issued 2014-05 ko
dc.identifier.citation ENERGY & ENVIRONMENTAL SCIENCE, v.7, no.5, pp.1737 - 1743 ko
dc.identifier.issn 1754-5692 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/4734 -
dc.description.abstract The charge/discharge characteristics of lithium ion batteries at low temperature (LT = -20 °C) are enhanced by using ethylene carbonate (EC)-based electrolytes with the help of assistant solvents of nitriles. Conventional liquid electrolytes (e.g. a mixture of EC and dimethyl carbonate (DMC), abbreviated as LED) cannot support a satisfactory capacity at low temperature as well as at high rates even if electric vehicles require low-temperature operation. Introducing propionitrile or butyronitrile (Pn or Bn) into LED (resulting in LEDPn or LEDBn) as a co-solvent increases significantly the high-rate capacities at -20°C. For example, LEDPn delivers 62% of the available capacity at 1 C and 46% at 3 C with a 2.7 V cut-off while the control LED provides just 6% and 4% at the same rates. Successful operation at -20°C with nitrile-assistant electrolytes results from high ionic conductivity, low viscosity and freezing point depression caused by the eutectic behavior of the carbonates (EC/DMC) and Pn. Based on the phase diagram of Pn with EC/DMC, we expect a meaningful battery operation up to -110°C, probably lower, at the eutectic composition. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Nitrile-assistant eutectic electrolytes for cryogenic operation of lithium ion batteries at fast charges and discharges ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-84898785574 ko
dc.identifier.wosid 000335013700023 ko
dc.type.rims ART ko
dc.description.wostc 0 *
dc.description.scopustc 0 *
dc.date.tcdate 2014-10-18 *
dc.date.scptcdate 2014-07-12 *
dc.identifier.doi 10.1039/c3ee43029d ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84898785574 ko
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