Acta Chim. Sinica ›› 2017, Vol. 75 ›› Issue (2): 206-211.DOI: 10.6023/A16100542 Previous Articles     Next Articles

Special Issue: 先进电池材料



张长欢a, 李念武a, 姚胡蓉a,b, 刘琳a,b, 殷雅侠a,b, 郭玉国a,b   

  1. a 中国科学院化学研究所 中国科学院分子纳米结构与纳米技术重点实验室 北京 100190;
    b 中国科学院大学 化学与化工学院 北京 100049
  • 投稿日期:2016-10-13 修回日期:2016-12-19 发布日期:2016-12-20
  • 通讯作者: 殷雅侠,;郭玉国,;Tel.:010-82617069;Fax:010-82617069;
  • 基金资助:


Synthesis of Sn Nanoparticles/Graphene Nanosheet Hybrid Electrode Material with Three-Dimensional Conducting Network for Magnesium Storage

Zhang Changhuana, Li Nianwua, Yao Huronga,b, Liu Lina,b, Yin Yaxiaa,b, Guo Yuguoa,b   

  1. a CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences(CAS), Beijing 100190, China;
    b School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-10-13 Revised:2016-12-19 Published:2016-12-20
  • Contact: 10.6023/A16100542;
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 51225204, 21303222, and 21127901) and the "Strategic Priority Research Program" of the Chinese Academy of Sciences (Grant No. XDA09010100).

Rechargeable magnesium (Mg) batteries have attracted research attention as one promising alternative for energy storage because of abundant raw materials. However, the strong electrostatic interaction between bivalent Mg-ions and host lattices often cause sluggish solid state diffusion of Mg-ion within the local crystal structure and consequently prevent reversible insertion/extraction of Mg-ion. Thus much more effort has been paid to develop suitable electrode materials with Mg-ion storage capability. This paper reports the synthesis of Sn nanoparticles/reduced-graphene-oxide nanosheet hybrid nanocomposite (Sn/rGO), by simple hydrothermal method and subsequent thermal treatment. Transmission electron microscopy (TEM) clearly shows that in the as-synthesized Sn/rGO powder Sn nanoparticles are well crystallized, and X-ray diffraction (XRD) pattern was consistent well with tetragonal Sn. Thermogravimetric analysis (TG) suggested that the mass percentage of Sn is ca. 82.3 wt% in the Sn/rGO nanocomposite, very close to the design ratio of ca. 83.4 wt%. As Mg-ion battery anode, the Sn/rGO electrode material exhibit a high initial discharge specific capacity (545.4 mAh·g-1 at 15 mA·g-1), good reversible ability and rate performance. The impressive electrochemical property could be attributed to the unique structure of Sn/rGO, in which the three-dimensional (3D) conducting network of rGO can effectively prevent the aggregation of Sn nanoparticles and alleviate the serious volume variation of Sn during repeated discharging/charging process, as well as facilitate the fast access of electrons and Mg-ion to improve kinetics for Mg-ion insertion/extraction. Ex situ XRD and SEM characterization were performed to investigate the electrochemical evolution of Sn/rGO electrode at different discharging/charging states. It is found that upon magnesiation crystalline Mg2Sn appears and subsequently disappears during de-magnesiation process, which indicates the good electrochemical activity of Sn nanoparticles in Sn/rGO hybrid nanocomposite for magnesium storage. Our result will open new avenue to develop high-efficient magnesium storage material for rechargeable Mg batteries.

Key words: magnesium storage, rechargeable magnesium battery, nanocomposite, conducting network, tin, graphene