%0 Journal Article
%@ 0167-2738
%A Nurfatin Nabilah, Abdul Hafidz
%A Nuraziliana, Muhd Ghazali
%A Norfatihah, Mazuki
%A Diantoro, M.
%A Nagao, Yuki
%A Ahmad Salihin, Samsudin
%D 2025
%F UmpIR:45204
%I Elsevier Ltd
%J Solid State Ionics
%K EDLC; Electrochemical properties; Graphene oxide; Proton conduction properties
%N 116956
%P 1-16
%T Graphene oxide-enhanced alginate-PVA biopolymer electrolytes with improved proton conductivity and electrochemical stability for supercapacitor applications
%U http://umpir.ump.edu.my/id/eprint/45204/
%V 429
%X This study explores the effect of graphene oxide (GO) incorporation on the structural and electrochemical   properties of alginate–poly(vinyl alcohol) (PVA) polymer electrolytes doped with ammonium nitrate (NH₄NO₃)   for supercapacitor applications. FTIR analysis revealed specific molecular interactions between graphene oxide   (GO) and the polymer host, while XRD results confirmed the enhanced amorphous nature of the composite. At 2   wt.% GO loading, the system exhibited peak ionic conductivity of 1.07 × 10-3 S/cm at room temperature, with a high ionic transference number (tₙ ≈ 0.98) and an extended electrochemical stability window of 2.85 V. Symmetric supercapacitors fabricated with these electrolytes achieved a specific capacitance of 240.78 F/g, an energy density of 131 Wh /kg,  and long-term cycling stability up to 10,000 cycles. These results demonstrate that GO-induced structural modulation significantly enhances proton transport and electrochemical performance, offering a promising biopolymer-based platform for next-generation energy storage devices.
%Z Indexed by Scopus