Rafizah Rahamathullah
Thumbnail Image
Preferred name
Rafizah Rahamathullah
Official Name
Rafizah, Rahamathullah
Alternative Name
Rahamathulla, Rafizah
Rahamathullah, R.
Main Affiliation
Scopus Author ID
55764144700
Researcher ID
DMZ-6313-2022

Research Output
Now showing 1 - 1 of 1
  • Publication
    The effect of NHâ‚„Br composition on electrical behaviour of 2-Hydroxyethyl cellulose solid biopolymer electrolytes
    (Semarak Ilmu Publishing, 2025-02)
    Nurul Faeqah Mazalan
    ;
    Mohd Ibnu Haikal Ahmad Sohaimy
    ;
    Azwani Sofia Ahmad Khiar
    ;
    Wan Mohd Khairul Wan Mohamed Zin
    ;
    Md Uwaisulqarni Osman
    ;
    Mohammad Fakhratul Ridwan Zulkifli
    ;
    Rafizah Rahamathullah
    ;
    Muthiah Muthuvinayagam
    ;
    Mohd Ikmar Nizam Mohamad Isa
    In this study, solid biopolymer electrolytes (SBEs) were developed as an alternative to liquid electrolytes for battery applications. 2-hydroxyethyl cellulose (2HEC) served as the polymer host in the preparation of SBE films, incorporating varying amounts of ammonium bromide (NH4Br). The films were then analysed using electrical impedance spectroscopy (EIS) to investigate its electrical properties. The system containing 20 wt.% of NH₄Br achieved the highest conductivity at 3.9510-5 Scm-1 at ambient temperature of 303 K. The 2HEC-NH₄Br SBE film system was subjected to temperature variations between 303 K – 373 K in increments of 10 °C, revealing an increase in conductivity with rising temperature. This observation suggests that the SBE system adheres to the Arrhenius law, enabling the determination of the activation energy (Ea) through temperature dependence plotting. The Ea for the most conductive system reflects the lowest energy, indicating minimal energy required for the excitation process within the polymer chain. This Ea value offers a deeper insight into the transport parameters, including the number of mobile ions, ions mobility and diffusion coefficient, as determined through the Rice and Roth method.