标题：Structural features and electrochemical properties of nanostructured ZnCo2O4 synthesized 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] Shandong Univ, Sch Chem & Chem Engn, Educ Minist, Key Lab Colloid & Interface Ch 更多
通讯作者地址：[Liu, SJ]Shandong Univ, Sch Chem & Chem Engn, Educ Minist, Key Lab Colloid & Interface Chem, Jinan 250100, Peoples R China.
来源：JOURNAL OF NANOPARTICLE RESEARCH
关键词：Zinc cobaltite ZnCo2O4; Oxalate precursor; Porous material; Anode; material; Lithium ion battery
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 degrees C, has been performed to synthesize phase-pure ZnCo2O4 spinels, 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 similar to 35.2-nm-singlecrystalline nanoparticles with polydisperse interspaces. More interestingly, porous ZnCo2O4 microrods can deliver an initial specific discharge capacity of 1,293.7 mAh g(-1) with the coulombic efficiency of 76.8 % at 0.2 A g(-1), reaching a value of 937.3 mAh g(-1) over 100 discharge-charge cycles. Even at a high current density of 2.0 A g(-1), the porous ZnCo2O4 nanostructures can still possess a reversible discharge capacity of similar to 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 ZnCo2O4 nanostructures with a high electrochemical performance.