Temperature-dependent ionic conductivity and transport properties of LiClO4-doped PVA/modified cellulose composites

Bulletin of materials science

Jagadish Naik⁴  H Chandrappa¹  G K Nagaraja³  Sunil G Rathod⁴  R F Bhajantri¹  Vidyashree Hebbar¹  P K Pujari²  V Ravindrachary⁴ 

[1] Department of Physics, Karnatak University, Dharwad 580 003, India$$Department of Physics, Karnatak University, Dharwad 580 003, IndiaDepartment of Physics, Karnatak University, Dharwad 580 003, India$$;Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India$$Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, IndiaRadiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400 085, India$$;Department of Chemistry, Mangalore University, Mangalagangotri 574 199, India$$Department of Chemistry, Mangalore University, Mangalagangotri 574 199, IndiaDepartment of Chemistry, Mangalore University, Mangalagangotri 574 199, India$$;Department of Physics, Mangalore University, Mangalagangotri 574 199, India$$Department of Physics, Mangalore University, Mangalagangotri 574 199, IndiaDepartment of Physics, Mangalore University, Mangalagangotri 574 199, India$$

关键词: Percolation;    transport properties;    VTF model;    ionic conductivity;    Williamsâ€�?�Landelâ€�?�Ferry.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

This paper presents the investigation on physicochemical properties and ionic conductivity of LiClO₄-doped poly(vinyl alcohol) (PVA)/modified cellulose composites. The percolative behaviour of LiClO₄ with dc conductivity (𝜎_dc) for different LiClO₄ weight fractions (p) related to transport dimensionality was also focused. The highest ionic conductivity of 9.79 Ã�? 10^â€�??6 S cm^â€�??1 was observed for 20 wt% LiClO₄ doping level at room temperature. The activation energies (𝐸_g) were estimated using temperature-dependent conductivity, which follows the Arrhenius and Vogelâ€�?�Tammannâ€�?�Fulcher (VTF) relation. The dynamic fragility (ð‘�??) and activation energy (𝐸_g) vs. ð‘�??_g of polymer composites using equivalence of the both Williamsâ€�?�Landelâ€�?�Ferry (WLF) and VTF equations were also correlated. Transport properties such as travel time of ions between sites (𝜏_o), mobility (ðœ�?), diffusion coefficient (𝐷) and number of transitions per unit time ð‘�?(𝐸) for normal cationic (Li⁺) hopping process of LiClO₄-doped PVA/mCellulose composites have been investigated using the Rice and Roth model.

【 授权许可】

Unknown