Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/94937
Title: Mesoporous Co3O4 and CoO@C topotactically transformed from chrysanthemum-like Co(CO3)0.5(OH)·0.11H2O and their lithium-storage properties
Authors: Xiong, Shenglin
Chen, Jun Song
Lou, David Xiong Wen
Zeng, Hua Chun
Keywords: DRNTU::Science::Medicine::Biomedical engineering
Issue Date: 2012
Source: Xiong, S. L., Chen, J. S., Lou, X. W., & Zeng, H. C. (2012). Mesoporous Co3O4 and CoO@C Topotactically Transformed from Chrysanthemum-like Co(CO3)0.5(OH)·0.11H2O and Their Lithium-Storage Properties. Advanced Functional Materials, 22(4), 861-871.
Series/Report no.: Advanced functional materials
Abstract: In this work, a novel hydrothermal route is developed to synthesize cobalt carbonate hydroxide, Co(CO3)0.5(OH)·0.11H2O. In this method, sodium chloride salt is utilized to organize single-crystalline nanowires into a chrysanthemum-like hierarchical assembly. The morphological evolution process of this organized product is investigated by examining different reaction intermediates during the synthesis. The growth and thus the final assembly of the Co(CO3)0.5(OH)·0.11H2O can be finely tuned by selecting preparative parameters, such as the molar ratio of the starting chemicals, the additives, the reaction time and the temperature. Using the flower-like Co(CO3)0.5(OH)·0.11H2O as a solid precursor, quasi-single-crystalline mesoporous Co3O4 nanowire arrays are prepared via thermal decomposition in air. Furthermore, carbon can be added onto the spinel oxide by a chemical-vapor-deposition method using acetylene, which leads to the generation of carbon-sheathed CoO nanowire arrays (CoO@C). Through comparing and analyzing the crystal structures, the resultant products and their high crystallinity can be explained by a sequential topotactic transformation of the respective precursors. The electrochemical performances of the typical cobalt oxide products are also evaluated. It is demonstrated that tuning of the surface texture and the pore size of the Co3O4 products is very important in lithium-ion-battery applications. The carbon-decorated CoO nanowire arrays exhibit an excellent cyclic performance with nearly 100% capacity retention in a testing range of 70 cycles. Therefore, this CoO@C nanocomposite can be considered to be an attractive candidate as an anode material for further investigation.
URI: https://hdl.handle.net/10356/94937
http://hdl.handle.net/10220/7729
DOI: 10.1002/adfm.201102192
Rights: © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

SCOPUSTM   
Citations 1

470
Updated on Mar 7, 2021

PublonsTM
Citations 1

451
Updated on Sep 4, 2020

Page view(s) 5

946
Updated on May 15, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.