One-step synthesis of ZnO@C nanospheres and their enhanced performance for lithium-ion batteries

被引：45

作者：

Bai, Zhongchao ^{[1
,2
]}

Zhang, Yuwen ^{[1
,2
]}

Fan, Na ^{[3
,4
]}

Guo, Chunli ^{[1
,2
]}

Tang, Bin ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Res Inst Surface Engn, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[4] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 119卷

关键词：

ZnO@C nanospheres; Lithium-ion batteries; Carbon materials; Nanoparticles; ELECTRODE MATERIALS; STORAGE PROPERTIES; HOLLOW SPHERES; CAPABILITY; MORPHOLOGY; CAPACITY; NANORODS; CO3O4; POWER;

D O I：

10.1016/j.matlet.2013.12.060

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

ZnO@C nanospheres with an average diameter of 200 rim have been synthesized using zinc (Zn) and acetylacetone as raw materials through a one-step co-pyrolysis method. The electrochemical properties of the ZnO@C nanospheres as an anode material are examined. The ZnO@C nanospheres give a reversible capacity of 440 mA h g(-1) at a current density of 100 mA g(-1) after 50 cycles. The improved electrochemical performance can be ascribed to the carbon shells, which not only serve as good electronic conductors but also act as good protective layers (preventing the pulverization) during lithiation/delithiation process. In addition, after removing of the internal ZnO in HCl solution, hollow carbon nanospheres can be obtained. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：16 / 19

页数：4

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