Low-temperature synthesis of two-dimensional nanostructured Co3O4 and improved electrochemical properties for lithium-ion batteries

Lu, Zhongpei, Ding, Jingjing, Lin, Xuehong, Liu, Yang, Ye, Haitao, Yang, Gang, Yin, Fan and Yan, Bo (2017). Low-temperature synthesis of two-dimensional nanostructured Co3O4 and improved electrochemical properties for lithium-ion batteries. Powder Technology, 309 , 22–30.

Abstract

Urea as a cheap reagent is very useful in preparation two-dimensional metal oxides with tunable crystal morphologies, while refluxing method is a simple route to control the decomposition of urea. Here, a low temperature refluxing in the presence of urea is developed to prepare porous Co3O4 as anode material for lithium-ion batteries. The self-assembly cobalt hydrotalcite-like compounds (Co-HLC) is firstly synthesized through refluxing the mixture of cobaltous nitrate and urea. After pyrolysis, the flower-like morphology of Co-HLC is successfully maintained in the final product of Co3O4. The ordered two-dimensional Co3O4 nanosheets provide good contact with electrolyte and stable porous structure during lithiation/delithiation. Co3O4-120 synthesized under refluxing temperature of 120 °C shows the initial charge capacities of 722 and 741 mAh g−1 at the 2nd and 100th cycle under 100 mA g−1. Moreover, Co3O4-120 as electrode for a supercapacitor presents excellent capacitance, 167 F g−1 after 3000 cycles at 1 A g−1. Under 5, 10 and 20 A g−1, Co3O4-120 electrode delivers 128, 104 and 90 F g−1, respectively. The porous structure in Co3O4 with enhanced electrochemical performance indicates low temperature refluxing preparation is an applicable and energy-saved method to synthesize transitional metal oxide with tunable crystal morphologies.

Publication DOI: https://doi.org/10.1016/j.powtec.2016.12.081
Divisions: Engineering & Applied Sciences > Electrical, electronic & power engineering
Engineering & Applied Sciences > Polymer and advanced materials research group
Additional Information: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords: anode materials,electrochemical performance,hydrotalcite-like compounds,lithium-ion batteries,metal oxide,refluxing,Chemical Engineering(all)
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2017-03
Authors: Lu, Zhongpei
Ding, Jingjing
Lin, Xuehong
Liu, Yang
Ye, Haitao ( 0000-0002-4005-4922)
Yang, Gang
Yin, Fan
Yan, Bo

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