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2019 Vol.29, Issue 2 Preview Page
High Temperature Supercapacitor with Free Standing Quasi-solid Composite Electrolytes

독립형 반고체 복합 전해질을 적용한 고온 수퍼커패시터

Dong Won Kim
,
Hyunyoung Jung†
김 동원
,
정 현영†
Department of Energy Engineering, Gyeongnam National University of Science and Technology, Jinju-si 52725, Republic of Korea
국립경남과학기술대학교 에너지공학과
†Corresponding author E-Mail : hyjung@gntech.ac.kr (H. Jung, GNTECH)
February 2019. pp. 121-128
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Abstract

Supercapacitors are attracting much attention in sensor, military and space applications due to their excellent thermal stability and non-explosion. The ionic liquid is more thermally stable than other electrolytes and can be used as a high temperature electrolyte, but it is not easy to realize a high temperature energy device because the separator shrinks at high temperature. Here, we report a study on electrochemical supercapacitors using a composite electrolyte film that does not require a separator. The composite electrolyte is composed of thermoplastic polyurethane, ionic liquid and fumed silica nanoparticles, and it acts as a separator as well as an electrolyte. The silica nanoparticles at the optimum mass concentration of 4wt% increase the ionic conductivity of the composite electrolyte and shows a low interfacial resistance. The 5 wt% polyurethane in the composite electrolyte exhibits excellent electrochemical properties. At 175 °C, the capacitance of the supercapacitor using our free standing composite electrolyte is 220 F/g, which is 25 times higher than that at room temperature. This study has many potential applications in the electrolyte of next generation energy storage devices.

Keywords
supercapacitor
composite electrolyte
high temperature
ionic liquid
polyurethane
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Information
  • Publisher :Materials Research Society of Korea
  • Publisher(Ko) :한국재료학회
  • Journal Title :Korean Journal of Materials Research
  • Journal Title(Ko) :한국재료학회지
  • Volume : 29
  • No :2
  • Pages :121-128
  • Received Date : 2018-11-16
  • Revised Date : 2019-01-21
  • Accepted Date : 2019-01-21
  • DOI :https://doi.org/10.3740/MRSK.2019.29.2.121
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