Three-dimensional NiCo2O4 nanowire arrays: preparation and storage behavior for flexible lithium-ion and sodium-ion batteries with improved electrochemical performance

摘要: The growth of three-dimensional (3D) porous NiCo2O4 nanowire arrays on a carbon fiber cloth (denoted as NCO@CFC) via facile low-cost solution method combined with subsequent annealing treatment is reported. structure and morphology the materials were characterized by X-ray diffraction, field-emission scanning electron microscopy, transmission microscopy. Owing to unique 3D hierarchical architecture, NCO@CFC nanowires flexible electrode material for lithium-ion batteries exhibit stable cycling performance (92.3% retention after 100 cycles), fairly high rate capacity (507 mA h g−1 at 4000 g−1), an enhanced lithium storage capacity. When employed sodium-ion batteries, investigated in comparison ordered array exhibits similar charge/discharge characteristics feasible electrochemical performance. greatly improved could be ascribed nanostructure together novel skeleton, which provides enough space allow volume expansion during Li+/Na+ insertion/extraction process facilitates rapid transport ions electrons.