The application of nickel-foam TiO2/CuO/CuCo2O4 composite electrode materials in non-enzymatic glucose sensors and supercapacitors

This study presents a nickel-foam supported TiO 2 /CuO/CuCo 2 O 4 composite electrode for dual-functional applications in non-enzymatic glucose sensing and supercapacitors. In glucose sensing performance tests, the TiO 2 /CuO/CuCo 2 O 4 electrode demonstrated a broad linear detection range (0.23–3.8 mM) and a high sensitivity of (715.2 ± 5) μA·mM −1 cm −2 , with a detection limit as low as 0.58 μM (signal-to-noise ratio, SNR = 3). Furthermore, the material exhibited outstanding performance in supercapacitor applications. Even at a high current density of 2 A g −1 , it maintained a specific capacity of up to (620 ± 15) C·g −1 , after 5000 cycles, the capacitance retention remained at (91.8 ± 0.3)%. The material's hierarchical porous structure and strong interfacial bonding contribute to its excellent performance, demonstrating great potential for multifunctional, high-efficiency energy storage and sensing materials.