Hierarchical Nanocomposites of Polyaniline Nanowire Arrays on Graphene Oxide Sheets with Synergistic Effect for Energy Storage

TLDR

PANI nanowire arrays are vertically aligned on graphene oxide substrates. The study develops a facile method to construct hierarchical PANI nanowire–GO nanocomposites and guides the preparation of functional nanocomposites from different dimensional nanomaterials. The authors fabricated hierarchical PANI nanowire–GO nanocomposites by combining 1D PANI nanowires with 2D GO nanosheets, controlling nanowire morphology via aniline/GO ratios, and confirming the structure with UV–vis, FTIR, and XRD. The resulting nanocomposite exhibited higher electrochemical capacitance and improved stability compared to individual PANI or GO components, demonstrating a synergistic effect for supercapacitor electrodes.

Abstract

We introduced a facile method to construct hierarchical nanocomposites by combining one-dimensional (1D) conducting polyaniline (PANI) nanowires with 2D graphene oxide (GO) nanosheets. PANI nanowire arrays are aligned vertically on GO substrate. The morphologies of PANI nanowires can be controlled by adjusting the ratios of aniline to GO, which are attributed to different nucleation processes. The hierarchical nanocomposite structures of PANI−GO were further proved by UV−vis, FTIR, and XRD measurements. The hierarchical nanocomposite possessed higher electrochemical capacitance and better stability than each individual component as supercapacitor electrode materials, showing a synergistic effect of PANI and GO. This study will further guide the preparation of functional nanocomposites by combining different dimensional nanomaterials.