文摘
Advanced nanostructured hybrid materials can help us overcome the electrochemical performance limitations of current energy storage devices. In this study, three-dimensional porous carbon nanowebs (3D-CNWs) with numerous included orthorhombic Nb<sub>2sub>O<sub>5sub> (T-Nb<sub>2sub>O<sub>5sub>) nanoparticles were fabricated using a microbe-derived nanostructure. The 3D-CNW/T-Nb<sub>2sub>O<sub>5sub> nanocomposites showed an exceptionally stable long-term cycling performance over 70 000 cycles, a high reversible capacity of ∼125 mA h g<sup>–1sup>, and fast Li-ion storage kinetics in a coin-type two-electrode system using Li metal. In addition, energy storage devices based on the above nanocomposites achieved a high specific energy of ∼80 W h kg<sup>–1sup> together with a high specific power of ∼5300 W kg<sup>–1sup> and outstanding cycling performance with ∼80% capacitance retention after 35 000 cycles.