• Title/Summary/Keyword: Polymer electrolyte

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Characterization of a Cross-linked Polymer Electrolyte Prepared from Oligo(ethylene glycol) methacrylates-Acrylonitrile

  • Lee, Chang-Ryoul;Hyun, Seok-Hee;Lee, Suk-Kee;Kim, Woo-Sik;Moon, Seong-In;Jin, Bong-Soo
    • Macromolecular Research
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    • v.9 no.5
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    • pp.292-295
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    • 2001
  • A cross-linked solid polymer electrolyte was prepared by copolymerizing photochemically acrylonitrile (AN), oligo(ethylene glycol ethyl ether) methacrylate, oligo(ethylene glycol) dimethacrylate in the presence of lithium perchlorate as a lithium salt, ethylene carbonate-propylene carbonate as a mixed plasticizer, and poly(ethylene oxide) as a polymer matrix. The maximum ionic conductivity of the polymer electrolyte was 2.35$\times$10$\^$-3/ S/cm. The interface resistance of the polymer electrolyte was very low compared to that of the polymer electrolyte without AN. The former electrolyte was stable up to 4.3 V and the Ah efficiency was nearly 100% during the charge-discharge cycle.

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Synthesis and Characteristics of Acrylol Borate as New Acrylic Gelator for Lithium Secondary Battery

  • Shin, Hyun-Min;Nguyen, Congtranh;Kim, Byeong-Yeol;Han, Myong-Hee;Kim, Ju-Sung;Kim, Jin-Hwan
    • Macromolecular Research
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    • v.16 no.2
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    • pp.134-138
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    • 2008
  • A novel acrylol borate was designed and synthesized by reacting acrylate monomer and boric acid. The obtained acrylol borate was used as both gelator and anion receptor for the liquid electrolyte in a lithium secondary battery. It was found that the ionic conductivity of the gel polymer electrolyte (GPE) was as high as that of the liquid electrolyte, and the thermal stability of GPE was increased when only 2 wt% acrylol borate was incorporated into the liquid electrolyte. These results suggest that acrylol borate can be used as an effective additive to enhance the thermal stability of the electrolyte without adversely affecting its conductivity. It is believed that the strong complex formation between boron in the gelator and the anion of the salt is responsible for the enhanced thermal stability of the electrolyte solution and the increased ionic conductivity.

Behavior of $Li^{+}$ in PAN/PVDF based Polymer Electrolyte for Lithium Polymer Battery (리튬 폴리머전지용 PAN/PVDF계 고분자 전해질의 리튬 이온 거동)

  • 이재안;김상기;김종욱;구할본;박계춘
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.540-543
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    • 2000
  • The purpose of this study is to research and develop solid polymer electrolyte(SPE) for Li polymer battery. The temperature dependence of conductivity, impedance spectroscopy and electrochemical properties of PAN/PVDF electrolytes as a function of a mixed ratio were reported for PAN/PVDF based polymer electrolyte films, which were prepared by thermal gellification method of preweighed PAN/PVDF, plasticizer and Li salt. The conductivity of PAN/PVDF electrolytes was $10^{-3}$S/cm. $PAN_{10}$$PVDF_{10}$$LiClO_4$$PC_{5}$$EC_{5}$ electrolyte has the better conductivity compared to others. The interfacial resistance behavior between the lithium electrode and PAN/PVDF based polymer electrolyte has also been investigated and compare with that between the lithium electrode and the PAN/PVDF based polymer electrolyte.

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Improvement in Long-Term Stability and Photovoltaic Performance of UV Cured Resin Polymer Gel Electrolyte for Dye-Sensitized Solar Cell

  • Park, Geun Woo;Hwang, Chul Gyun;Jung, Jae Won;Jung, Young Mee
    • Bulletin of the Korean Chemical Society
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    • v.33 no.12
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    • pp.4093-4097
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    • 2012
  • We introduced a new UV-cured resin polymer gel as an electrolyte for dye-sensitized solar cells (DSSCs) that is cured with UV irradiation to form a thin film of UV-cured resin polymer gel in the cells. The gel film was characterized and its potential for use as an electrolyte in DSSCs was investigated. This new UV-cured resin polymer gel was successfully applied as a gel polymer electrolyte in DSSCs overcoming the problems associated with the liquid electrolytes in typical DSSCs. The effect of ${\gamma}$-butylrolactone (GBL) on the long-term stability and photovoltaic performance in DSSCs using this UV-cured resin polymer gel electrolyte was also investigated. The results of the energy conversion efficiency, ionic conductivity and Raman spectra of the UV-cured resin polymer gel electrolyte with the addition of 6 wt % GBL to the UV-cured resin polymer electrolyte showed good long-term stability and photovoltaic performance for the DSSCs with the UV-cured polymer gel electrolyte.

Study for Photovoltaic Characteristics of Gel Type Dye Sensitized Solar Cells (젤형 염료 태양전지의 광전변환 특성에 관한 연구)

  • Park, Byung-Wook;Kwak, Dong-Joo;Sung, Youl-Moon
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.2
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    • pp.168-174
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    • 2009
  • In this paper Gel polymer electrolyte using Poly(Vdf-HFP) was fabricated and compared with liquid type electrolyte. The chemical structure and ingredients of fabricated gel electrolyte was investigated and identified to gel polymer electrolyte by FTIR, gel electrolyte was verified to polymer state by SEM From the experiment result, the better component ratio of Propylene carbonate and Diethyl carbonate for gel type electrolyte was 5 : 5. The conversion efficiency of fabricated DSCs using gel electrolyte was $3{\sim}4[%]$, expected to alternate with liquid type electrolyte.

The characteristics of polymer electrolyte for lithium polymer battery

  • Park Soo-Gil;Park Jong-Eun;Lee Ju-Seong
    • Journal of the Korean Electrochemical Society
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    • v.2 no.1
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    • pp.1-4
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    • 1999
  • A lithium ion battery with polymer electrolyte is expected as a safe and long cycle life battery. This paper reports primarily the recent development results of a solid polymer electrolyte, which is a key factor of the secondary battery system, that has been obtained during the process of the development of a polymer type lithium battery. As a successful result of the solid polymer electrolyte. The ionic conductivity of the solid polymer electrolyte, which is composed of polyacrylonitrile and $LiClO_4\;with\; Al_2O_3$ dissolved as the supporting electrolyte, has been confirmed to be $2.3\times10^{-4} S/cm$ at room temperature.

A Study on Electrochemical Properties of Acrylate-based Gel Polymer Electrolyte with Ethylene Oxide Group (Ethylene Oxide기를 갖는 Acrylate계 Gel Polymer Electrolyte의 전기화학적 특성에 관한 연구)

  • Kim, Hyun-Soo;Shin, Jung-Han;Moon, Seong-In;Oh, Dae-Hee
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.17 no.6
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    • pp.608-614
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    • 2004
  • The gel polymer electrolyte was prepared by radical polymerization using tetra(ethylene glycol) diacrylate and tri(ethylene glycol) dimethacrylate to investigate affect of the number of ethylene oxide. The gel polymer electrolyte showed good electrochemical stability up to 4.5 V vs. Li/Li and high ionic conductivity at various temperatures. The lithium-ion polymer batteries with the gel polymer electrolyte, tetra(ethylene glycol) diacrylate- and tri(ethylene glycol) dimethacrylate-based, also represented good electrochemical performances such as rate capability, low-temperature performances and cycleability. However, the cell with tri(ethylene glycol) dimethacrylate, which has three ethylene oxide, showed better electrochemical performance.