Issue 35, 2010

Non-sacrificial template synthesis of Cr2O3–C hierarchical core/shell nanospheres and their application as anode materials in lithium-ion batteries

Abstract

Cr2O3-based nanospheres have been synthesized by a facile soft-template assisted method without sacrificing the template. Two types of Cr2O3 materials, the Cr2O3–C composite nanospheres (referred to as Cr2O3–C) with a novel hierarchical core/shell structure, and pure mesoporous Cr2O3 spheres (referred to as mesoporous Cr2O3) have been obtained by using a certain thermal treatment without adding more carbon precursor. The carbon coating layers in the Cr2O3–C composite distribute from the inside to the surface of the spheres continuously. Both the Cr2O3–C composite and the pure mesoporous Cr2O3 spheres are investigated with XRD, SEM, TEM, and electrochemical tests toward lithium storage. It is found that the reversible capacity for Cr2O3–C composite still retain more than 600 mA h g−1 even after 35 cycles, showing a capacity retention of 87%, while mesoporous Cr2O3 spheres and commercial Cr2O3 can only deliver a capacity of 320 mA h g−1 and 280 mA h g−1, respectively. The improvements can be attributed to the superiorities both in structure and in composition.

Graphical abstract: Non-sacrificial template synthesis of Cr2O3–C hierarchical core/shell nanospheres and their application as anode materials in lithium-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
13 Apr 2010
Accepted
10 Jun 2010
First published
02 Aug 2010

J. Mater. Chem., 2010,20, 7565-7569

Non-sacrificial template synthesis of Cr2O3–C hierarchical core/shell nanospheres and their application as anode materials in lithium-ion batteries

L. Jiang, S. Xin, X. Wu, H. Li, Y. Guo and L. Wan, J. Mater. Chem., 2010, 20, 7565 DOI: 10.1039/C0JM01027H

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