Electrochemical performance of Ni x Co1-x MoO4 (0 ≤ x ≤ 1) nanowire anodes for lithium-ion batteries
Department of Materials Science and Engineering, Ajou University, Suwon, 443-749, Republic of Korea
Nanoscale Research Letters 2012, 7:35 doi:10.1186/1556-276X-7-35Published: 5 January 2012
NixCo1-xMoO4 (0 ≤ x ≤ 1) nanowire electrodes for lithium-ion rechargeable batteries have been synthesized via a hydrothermal method, followed by thermal post-annealing at 500°C for 2 h. The chemical composition of the nanowires was varied, and their morphological features and crystalline structures were characterized using field-emission scanning electron microscopy and X-ray powder diffraction. The reversible capacity of NiMoO4 and Ni0.75Co0.25MoO4 nanowire electrodes was larger (≈520 mA h/g after 20 cycles at a rate of 196 mA/g) than that of the other nanowires. This enhanced electrochemical performance of NixCo1-xMoO4 nanowires with high Ni content was ascribed to their larger surface area and efficient electron transport path facilitated by their one-dimensional nanostructure.