%0 Journal Article
%T Sn/SnO/SnO<sub>2</sub>@C复合材料的制备及储锂性能<br>Preparation and Lithium Storage Properties of Sn/SnO/SnO<sub>2</sub>@C Composites
%A 丹帅
%A 田光梅
%A 王尧尧
%A 王北平
%J Material Sciences
%P 741-748
%@ 2160-7621
%D 2022
%I Hans Publishing
%R 10.12677/MS.2022.127082
%X 锡基材料作为锂离子电池负极材料，其体积膨胀效应显著，严重限制了实际应用。本文利用配位反应得到Sn-MOF前驱体，然后再经过碳化处理制备了Sn/SnO/SnO<sub>2</sub>@C多相复合材料。综合利用X射线衍射、扫描电镜、透射电镜、恒电流测试及循环伏安测试等技术手段对所得产物的形貌、相组成和储锂性能进行了研究。物相及形貌分析表明，以Sn-MOF为前驱体制备的复合材料为结晶度较高的多相复合物，包括Sn、SnO、SnO<sub>2</sub>及石墨碳。随着有机配体比例的增加，复合材料中孔隙结构增加，锡含量逐渐增大。电化学性能测试表明，具有多孔结构的Sn/SnO/SnO<sub>2</sub>@C复合材料在100 mA/g的电流密度下，放电比容量达到1066 mAh/g，在1000 mA/g电流密度下经过35圈电化学循环后的容量保持率为83.6%。由于具有更丰富的孔隙结构，样品2的高倍率充放电性能更加突出。在2000 mA/g电流密度下，其脱锂比容量达到108.1 mAh/g。<br />
As the anode material of lithium ion battery, tin-based materials have severe volume expansion effect, which seriously limits its practical application. In this paper, Sn-MOF precursors were obtained by coordination reaction, and Sn/SnO/SnO<sub>2</sub>@C multiphase composites were prepared by carbonization. The morphology, phase composition and lithium storage properties of the products were studied by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy, galvanostatic testing and cyclic voltammetry. The analysis of phase and morphology exhibits that the composites prepared by Sn-MOF precursor consist of multiphase with high crystallinity, including Sn, SnO, SnO<sub>2</sub> and graphite carbon. With the increase of organic ligand, the pore structure and tin content of the composites gradually increase. Electrochemical tests indicate that, for Sn/SnO/SnO<sub>2</sub>@C composites with porous structure, the specific discharge capacity reaches 1066 mAh/g at the current density of 100 mA/g, and the capacity retention rate remains 83.6 % after 35 electrochemical cycles at the current density of 1000 mA/g. Due to its rich pore structure, sample 2 has more outstanding rate charge/discharge performance. At the current density of 2000 mA/g, the specific capacity of delithiation reaches 108.1 mAh/g.
%K 锂离子电池，多相复合物，Sn-MOF，储锂性能<br>Lithium-Ion Battery
%K Multiphase Composites
%K Sn-MOF
%K Lithium Storage Performance
%U http://www.hanspub.org/journal/PaperInformation.aspx?PaperID=54271