SnO2/石墨烯锂离子电池负极材料的制备及其电化学行为研究

doi:10.3724/SP.J.1077.2013.12374

无机材料学报 ›› 2013, Vol. 28 ›› Issue (5): 515-520.DOI: 10.3724/SP.J.1077.2013.12374 CSTR: 32189.14.SP.J.1077.2013.12374

SnO₂/石墨烯锂离子电池负极材料的制备及其电化学行为研究

虞祯君¹, 王艳莉¹, 邓洪贵¹, 詹亮¹, 杨光智², 杨俊和², 凌立成¹

(1. 华东理工大学化学工程联合国家重点实验室, 特种功能高分子材料及其相关技术教育部重点实验室, 上海 200237; 2. 上海理工大学材料科学与工程学院, 上海200093)

收稿日期:2012-06-12 修回日期:2012-08-02 出版日期:2013-05-10 网络出版日期:2013-04-22
作者简介:虞祯君(1988-), 男, 硕士.
基金资助:
国家自然科学基金(51002051, 20806024, 50672025, 5073003);中央高校基本科研业务费专项基金(WA1014016)

Synthesis and Electrochemical Performance of SnO₂/Graphene Anode Material for Lithium Ion Batteries

YU Zhen-Jun¹, WANG Yan-Li¹, DENG Hong-Gui¹, ZHAN Liang¹, YANG Guang-Zhi², YANG Jun-He², LING Li-Cheng¹

(1. State Key Laboratory of Chemical Engineering, Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; 2. School of Material Science and Technology, University of Shanghai for Science and Technology, Shanghai 200093, China)

Received:2012-06-12 Revised:2012-08-02 Published:2013-05-10 Online:2013-04-22
About author:YU Zhen-Jun.
Supported by:
National Natural Science Foundation of China (51002051, 20806024, 50672025, 5073003);Foundamental Research Funds for the Central Universities (WA1014016)

摘要/Abstract

摘要：

以氧化石墨和氯化亚锡为原料, 采用原位合成法制得SnO₂/石墨烯纳米复合材料。该方法不需外加还原剂, 也避免了SnO₂纳米粒子和石墨烯在机械混合过程中的团聚问题。XRD和TEM等的分析结果表明, 纳米SnO₂颗粒都均匀地分散在石墨烯表面, 其中纳米SnO₂的粒径和石墨烯的厚度分别为3~6 nm和1.5~2.0 nm。电化学测试结果表明: 在200 mA/g电流密度下循环100次后, SnO₂/石墨烯负极材料的嵌锂容量可稳定在552 mAh/g, 容量保持率比单纯纳米SnO₂提高了4.4倍; 在40、400、800 mA/g的电流密度下, SnO₂/石墨烯负极材料的放电容量可分别保持在724.5、426.0、241.3 mAh/g, 表现出较好的倍率性能, 该结果归因于石墨烯良好的导电性及其二维纳米结构。

关键词: 二氧化锡, 石墨烯, 负极材料, 锂离子电池

Abstract:

SnO₂/graphene nanocomposites were in-situ prepared by using graphite oxide and SnCl₂·2H₂O as raw material, in which external reducing agent is not required. Compared with mechanical mixing method, it can avoid the congregation of SnO₂ nanoparticles and graphene. The analysis results (XRD, TEM, etc) indicate that SnO₂ nanoparticles are homogeneously dispersed on the surface of graphene layers with a particle size of 3-6 nm, and the thickness of graphene layers is about 1.5-2 nm. The main electrochemical performance can be concluded as follows. 1) The discharge capacity of SnO₂/graphene anode electrode after 100 cycles at 200 mA/g, remains at 552 mAh/g, and the capacity retention is 4.4 times of bare SnO₂. 2) The discharge capacities of SnO₂/graphene anode electrode at 40, 400 and 800 mA/g are 724.5, 426.0 and 241.3 mAh/g, respectively. The excellent rate capability should be attributed to the high electric conductivity and two-dimensional nanostructures of graphene.

Key words: tin oxide (SnO₂), graphene, anode material, lithium-ion battery

中图分类号:

TM914

虞祯君, 王艳莉, 邓洪贵, 詹亮, 杨光智, 杨俊和, 凌立成. SnO₂/石墨烯锂离子电池负极材料的制备及其电化学行为研究[J]. 无机材料学报, 2013, 28(5): 515-520.

YU Zhen-Jun, WANG Yan-Li, DENG Hong-Gui, ZHAN Liang, YANG Guang-Zhi, YANG Jun-He, LING Li-Cheng. Synthesis and Electrochemical Performance of SnO₂/Graphene Anode Material for Lithium Ion Batteries[J]. Journal of Inorganic Materials, 2013, 28(5): 515-520.

图/表 4

图1 (a) 样品的XRD图谱与(b) SnO2/石墨烯纳米复合物和纯石墨烯的TG曲线

Fig. 1 (a) XRD patterns of samples and (b) TG curves of SnO2/graphene and graphene

图2 石墨烯(a~d)和石墨烯纳米复合物(e~h)的SEM、TEM和HRTEM照片

Fig. 2 SEM, TEM and HRTEM images of graphene and SnO2/graphene

图3 (a) 石墨烯的充放电曲线, (b) SnO2/石墨烯负极材料和纳米SnO2的首次充放电曲线, SnO2/石墨烯负极材料的充放电曲线(c)和循环伏安曲线(d)

Fig. 3 (a) Charge/discharge profile of graphene, (b) The first charge/discharge profile of SnO2/graphene and SnO2, (c) Charge/discharge profile and (d) Cyclic voltammograms of SnO2/graphene

图4 (a)样品的循环性能和(b)石墨烯和SnO2/石墨烯负极材料的倍率循环性能

Fig. 4 (a) Cyclic performance of samples and (b) cyclic performance of graphene and SnO2/graphene at different rates

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SnO₂/石墨烯锂离子电池负极材料的制备及其电化学行为研究

Synthesis and Electrochemical Performance of SnO₂/Graphene Anode Material for Lithium Ion Batteries

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