Structural features and electrochemical properties of nanostructured ZnCo2O4 synthesized by an oxalate precursor method
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- 作者：Wenpei Kang ; Fan Feng ; Miaomiao Zhang ; Shaojie Liu…
- 关键词：Zinc cobaltite ZnCo2O4 ; Oxalate precursor ; Porous material ; Anode material ; Lithium ion battery
- 刊名：Journal of Nanoparticle Research
- 出版年：2013
- 出版时间：November 2013
- 年：2013
- 卷：15
- 期：11
- 全文大小：541KB
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Fan Feng (1)
Miaomiao Zhang (1)
Shaojie Liu (1)
Qiang Shen (1)
1. Key Laboratory for Colloid and Interface Chemistry of Education Ministry, School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, China - ISSN：1572-896X
文摘
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 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 ~35.2-nm single-crystalline nanoparticles with polydisperse interspaces. More interestingly, porous ZnCo2O4 microrods can deliver an initial specific discharge capacity of 1,293.7?mAh?g? with the coulombic efficiency of 76.8?% at 0.2?A?g?, reaching a value of 937.3?mAh?g? over 100 discharge–charge cycles. Even at a high current density of 2.0?A?g?, the porous ZnCo2O4 nanostructures can still possess a reversible discharge capacity of ~925.0?mAh?g?, 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.