多级结构SnO<sub>2</sub>及其碳复合物的制备与电化学性能

摘要

针对SnO₂作为锂离子电池负极材料循环性能和导电性差的问题，采用水热法制备了SnO₂/C复合物。研究了多级结构SnO₂的制备工艺并以此为基础制备了SnO₂/C复合物，通过XRD、SEM、TEM等分析方法表征了材料的结构、组成和形貌；采用循环伏安、恒流充放电等电化学方法表征SnO₂和SnO₂/C复合材料的电化学性能。实验结果表明，在200 mA·g^-1恒电流密度充放电时，SnO₂/C复合物电极充放电循环50次后比容量为346.1 mAh·g^-1，远高于SnO₂电极；与此同时，无定形碳的引入使SnO₂/C复合物电极的倍率性能也显著提高。

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	娜仁
	田建华
	碗海鹰
	单忠强

关键词：锂离子电池多级结构SnO₂ 碳复合水热法

Abstract：

To improve the poor cycling performance and low conductivity of SnO₂, SnO₂/C composite was synthesized by hydrothermal process and was used as anode material of lithium battery. The technology of preparation hierarchical SnO₂ was investigated by adjusting the concentration of tin source. The constitution and morphology of material were characterized by XRD and SEM technique. The CV and constant-current charge/discharge were used to analyze the electrochemical performance. Compared with hierarchical SnO₂ electrode, hierarchical SnO₂/C composite electrode exhibits 346.1 mAh·g^-1 at 200 mA·g^-1 after 50 cycles while SnO₂ electrode remain 20.6 mAh·g^-1 at the same condition. At the same time, rate capability is improved by introducing the amorphous carbon.

Keywords： lithium-ion battery； hierarchical SnO₂； carbon composite； hydrothermal process

Received 2016-04-22;

Fund:

天津市重点基金项目（14JCZDJC32400）。

Corresponding Authors: 田建华,E-mail:jhtian@tju.edu.cn。 Email: jhtian@tju.edu.cn

About author: 娜仁(1991-),女,硕士研究生,现从事锂离子电池负极材料方面的研究。

引用本文:

娜仁, 田建华, 碗海鹰, 单忠强.多级结构SnO₂及其碳复合物的制备与电化学性能[J]. 化学工业与工程, 2018,35(2): 16-21,69

Naren, Tian Jianhua, Wan Haiying, Shan Zhongqiang.Preparation and Electrochemical Properties of Hierarchical SnO₂ and Its Carbon Composite[J]. Chemcial Industry and Engineering, 2018,35(2): 16-21,69

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