标题：Structural features and electrochemical properties of nanostructured ZnCo2O4synthesized by an oxalate precursor method
作者：Kang, Wenpei ;Feng, Fan ;Zhang, Miaomiao ;Liu, Shaojie ;Shen, Qiang
作者机构：[Kang, Wenpei ;Feng, Fan ;Zhang, Miaomiao ;Liu, Shaojie ;Shen, Qiang ] Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Schoo 更多
来源：Journal of Nanoparticle Research
摘要：As a Li-ion battery anode, the active substance with a porous nanostructure can be endowed with a high electrochemical performance because of its porosity and remarkable surface area. In this paper, the thermal decomposition of zinc-cobalt binary oxalate precursors, precipitated from a solvothermal medium of ethanol and water (75/25, v/v) at 100°C, has been performed to synthesize phase-pure ZnCo2O4spinels, thoroughly giving porous and rod-like configurations with an average length of a few micrometers. Interestingly, each of the as-obtained porous microrods has been well characterized to consist of ∼35.2-nm single-crystalline nanoparticles with polydisperse interspaces. More interestingly, porous ZnCo2O4microrods can deliver an initial specific discharge capacity of 1,293.7 mAh g-1with the coulombic efficiency of 76.8% at 0.2 A g-1, reaching a value of 937.3 mAh g-1over 100 discharge-charge cycles. Even at a high current density of 2.0 A g-1, the porous ZnCo2O4nanostructures can still possess a reversible discharge capacity of ∼925.0 mAh g-1, further assigned to the synergistic effect of Zn- and Co-based oxide components. Anyway, the facile oxalate precursor method can realize the controlling synthesis of porous and rod-like ZnCo2O4nanostructures with a high electrochemical performance. © Springer Science+Business Media 2013.