Synthesis of Sn Nanoparticles/Graphene Nanosheet Hybrid Electrode Material with Three-Dimensional Conducting Network for Magnesium Storage
文献类型：期刊论文
| 作者 | Zhang Changhuan1; Li Nianwu1; Yao Hurong1,2; Liu Lin1,2; Yin Yaxia1,2; Guo Yuguo1,2 |
| 刊名 | ACTA CHIMICA SINICA
 |
| 出版日期 | 2017-02-15 |
| 卷号 | 75期号:2页码:206-211 |
| 关键词 | Magnesium Storage Rechargeable Magnesium Battery Nanocomposite Conducting Network Tin Graphene |
| 英文摘要 | 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. |
| 语种 | 英语 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/38487]  |
| 专题 | 化学研究所_分子纳米结构与纳米技术实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Changhuan,Li Nianwu,Yao Hurong,et al. Synthesis of Sn Nanoparticles/Graphene Nanosheet Hybrid Electrode Material with Three-Dimensional Conducting Network for Magnesium Storage[J]. ACTA CHIMICA SINICA,2017,75(2):206-211. |
| APA | Zhang Changhuan,Li Nianwu,Yao Hurong,Liu Lin,Yin Yaxia,&Guo Yuguo.(2017).Synthesis of Sn Nanoparticles/Graphene Nanosheet Hybrid Electrode Material with Three-Dimensional Conducting Network for Magnesium Storage.ACTA CHIMICA SINICA,75(2),206-211. |
| MLA | Zhang Changhuan,et al."Synthesis of Sn Nanoparticles/Graphene Nanosheet Hybrid Electrode Material with Three-Dimensional Conducting Network for Magnesium Storage".ACTA CHIMICA SINICA 75.2(2017):206-211. |
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来源：化学研究所
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