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Polymer testing v.58, 2017년, pp.116 - 125   SCI SCIE SCOPUS
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Structure and ion transport in an ethylene carbonate-modified biodegradable gel polymer electrolyte

Muchakayala, Ravi (Shenzhen Key Laboratory of Advanced Materials, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China ) ; Song, Shenhua (Shenzhen Key Laboratory of Advanced Materials, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China ) ; Gao, Shang (Shenzhen Key Laboratory of Advanced Materials, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China ) ; Wang, Xiaoling (Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China ) ; Fan, Youhua (Shenzhen Key Laboratory of Advanced Materials, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China ) ;
  • 초록  

    Abstract The influence of ethylene carbonate (EC) addition on 85poly(ε - caprolactone):15Lithium thiocyanate (85PCL:15LiSCN) polymer electrolyte is investigated using X-ray diffraction, impedance spectroscopy, Wagner's polarization and electrochemical measurements. The results reveal that the amorphicity of the 85PCL:15LiSCN system increases with increase of EC content up to an optimal level of 40 wt.%. This is reflected in the electrical properties of the gel polymer electrolytes, i.e., the 40 wt.% EC-incorporated gel polymer electrolyte exhibits both high amorphicity and high electrical conductivity as compared to the other samples. The EC concentration dependences of dielectric constant and electrical conductivity show a similar trend, indicating that these properties are closely related to each other. The total ionic transference numbers of EC-incorporated gel polymer electrolytes are in the range 0.989–0.993, demonstrating that they are almost completely ionic conductors. The electrochemical stability window of the 40 wt.% EC-incorporated gel polymer electrolyte is ∼4.1 V along with the electrical conductivity of 2.2 × 10 −4 S cm −1 , which is significantly improved as compared to the 85PCL:15LiSCN system (3.0 V and 1.04 × 10 −6 S cm −1 ). Consequently, the addition of EC in the 85PCL:15LiSCN polymer electrolyte leads to a promising improvement in its various properties.


  • 주제어

    Gel polymer electrolytes .   Structural studies .   Ion transport .   Ionic conductivity .   Transference number .   Electrochemical stability.  

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