Nanostructured transition metal oxides are promising alternative anodes for lithium ion batteries. Li-ion storage performance is expected to improve if high packing density energy particles are available. Herein, Mn2O...Nanostructured transition metal oxides are promising alternative anodes for lithium ion batteries. Li-ion storage performance is expected to improve if high packing density energy particles are available. Herein, Mn2O3 microspheres with a ca. 18 μm diameter and a tapped density of 1.33 g/cm3 were synthesized by a facile solvothermal-thermal coversion route. Spherical MnCO3 precursors were obtained through solvotbermal treatment and they decomposed and converted into Mn2O3 microspheres at an annealing temperature of 700℃. The Mn2O3 microspheres consisted of Mn2O3 nanoparticles with an average 40 nm diameter. These porous Mn2O3 microspheres allow good electrolyte penetration and provide an ion buffer reservoir to ensure a constant electrolyte supply. The Mn2O3 microspheres have reversible capacities of 590 and 320 mAh/g at 50 and 400 mA/g, respectively. We thus report an efficient route for the fabrication of energy particles for advanced energy storage.展开更多
基金supported by the National Natural Science Foundation of China(21422604)the PetroChina Technology R&D Project on New Technology and the Method for Oil & Gas Development(2011A-1006)CNPC Innovation Foundation (2014D-5006-0207)
文摘Nanostructured transition metal oxides are promising alternative anodes for lithium ion batteries. Li-ion storage performance is expected to improve if high packing density energy particles are available. Herein, Mn2O3 microspheres with a ca. 18 μm diameter and a tapped density of 1.33 g/cm3 were synthesized by a facile solvothermal-thermal coversion route. Spherical MnCO3 precursors were obtained through solvotbermal treatment and they decomposed and converted into Mn2O3 microspheres at an annealing temperature of 700℃. The Mn2O3 microspheres consisted of Mn2O3 nanoparticles with an average 40 nm diameter. These porous Mn2O3 microspheres allow good electrolyte penetration and provide an ion buffer reservoir to ensure a constant electrolyte supply. The Mn2O3 microspheres have reversible capacities of 590 and 320 mAh/g at 50 and 400 mA/g, respectively. We thus report an efficient route for the fabrication of energy particles for advanced energy storage.
