Acta Phys. -Chim. Sin. ›› 2012, Vol. 28 ›› Issue (09): 2057-2064.doi: 10.3866/PKU.WHXB201205251

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

Formation Mechanism, Structure Model and Electrochemical Performance of an In situ Cross Linking Hybrid Polymer Electrolyte Membrane

LIANG Gui-Jie1,2, ZHONG Zhi-Cheng1, XU Jie3, XU Wei-Lin3, CHEN Mei-Hua1, ZHANG Zeng-Chang1, LI Wen-Lian1   

  1. 1. Research Center for Materials Science & Engineering, Hubei University of Arts and Science, Xiangyang 441053, Hubei Province, P. R. China;
    2. State Key Laboratory for Mechanical Behavior of Materials, Xi'an JiaoTong University, Xi'an 710049, P. R. China;
    3. Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan Textile University, Wuhan 430073, P. R. China
  • Received:2012-03-30 Revised:2012-05-24 Published:2012-08-02
  • Contact: LIANG Gui-Jie E-mail:lgj511011@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51003082), Key Project of Science and Technology Research of Ministry of Education (208089) and Natural Science Foundation of Hubei Province,China (2011CDC062).

Abstract:

A Nano-TiO2/poly(citric acid titanium complex-polyethylene glycol)/LiI/I2 crosslinked hybrid polymer electrolyte membrane has been prepared via in-situ polymerization and compositing. Specifically, the method used the synthesized crosslinked network of poly(citric acid titanium complex-polyethylene glycol) containing the Ti(VI) hybrid center as a substrate, the hydrolyzed Nano-TiO2 as fillers and LiI/I2 as conductive ionics. The formation mechanism of the crosslinked hybrid polymer matrix is discussed. A structural model was established with a local density approximation (LDA) method. The influence of Ti(iOPr)4 content on the structure and electrochemical performance of the electrolyte membrane were investigated with Raman spectra, Fourier transform infrared spectra (FTIR), transmission electron microscopy (TEM), and an energy dispersive X-ray analysis (EDXA) technique. It was found that when the Ti(iOPr)4 content was higher than 12% (w), the combined action of Nano-TiO2 particles and the Ti(VI) hybrid center improved not only the room-temperature ionic conductivity (σ), but also the interfacial stability. At 48% (w) Ti(iOPr)4 content, the value of σ reached a maximum of 9.72×10-5 S·cm-1 and the interface resistance became stable after 6 d.

Key words: Polymer electrolyte, Dye-sensitized solar cells, Titanium tetraisopropoxide, Ionic conductivity, Interface stability

MSC2000: 

  • O646