Synergistic effect of the core-shell structured Sn/SnO2/C ternary anode system with the improved sodium storage performance

被引：63
作者：
Cheng, Yayi [1 ]
Huang, Jianfeng [1 ]
Li, Jiayin [1 ]
Xu, Zhanwei [1 ]
Cao, Liyun [1 ]
Qi, Hui [1 ]
机构：
[1] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2016年 / 324卷
基金：
中国国家自然科学基金;
关键词：
Synergistic effect; SnO2; Ternary anode; Sodium-ion battery; LITHIUM-ION BATTERIES; REDUCED GRAPHENE OXIDE; ELECTROCHEMICAL PROPERTIES; HIGH-CAPACITY; CYCLING PERFORMANCES; PROMISING ANODE; HOLLOW SPHERES; TIN OXIDE; NANOCOMPOSITE; SN;
D O I：
10.1016/j.jpowsour.2016.05.123
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Sn/SnO2/C ternary composite with core-shell structures is synthesized using a hydrothermal method and subsequent heat treatment at 973 K. This Sn/SnO2/C composite exhibits the micro-sphere structure that nanosized Sn and SnO2 particles are well encapsulated in the carbon matrix. As anode for sodium-ion batteries, the composite displays superior cycling stability and rate capability to SnO2/C and Sn/C composites. It delivers a high initial discharge capacity of 1110 mAh g(-1) with good cyclability. Even at a high current density of 1000 mA g(-1), a reversible capacity of 120 mAh g(-1) is still remained. The enhanced sodium storage performance of Sn/SnO2/C anode is attributed to the synergistic effect provided by Sn, SnO2 and unique core-shell structure. Since the deformation of Sn can increase the reversible capacity of the SnO2 electrode and the carbon matrix could act as a buffer to accommodate the volume change. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：447 / 454
页数：8
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