标题
作者
作者:Hu, RZ (Hu, Renzong)[1,2 ]; Waller, GH (Waller, Gordon Henry)[2 ]; Wang, YK (Wang, Yukun)[1 ]; Chen, Y (Chen, Yu)[2 ]; Yang, CH (Yang, Chenghao)[3 ]; Zhou, WJ (Zhou, Weijia)[3 ]; Zhu, M (Zhu, Min)[1 ]; Liu, ML (Liu, Meilin)[2 ]
期刊信息
摘要
Tin-based electrodes have attracted much attention because of their potential to offer high energy and power density while maitaining excellent cycling stability. Here we report our findings from the rational design and synthesis of a high-performance Cu6Sn5@SnO2-C electrode, a tin-based anode with a unique core/shell structure consisting of a tin-copper intermetallic (Cu6Sn5) core and a tin dioxide (SnO2)/carbon (C) shell. The hybrid structure was synthesized by a simple and cost-effective two-step process. When used as an electrode, the Cu6Sn5@SnO2-C hybrid nanocomposite demonstrated a reversible capacity of 619 mA h/g after 500 cycles between 0.05 and 3.0 V vs. Li/Li+ at 0.2 A/g, with stable capacities of similar to 300 mA h/g from the reversible conversion reaction of SnO2 in a potential range of 1.1-2.0 V. Results suggest that the maximum volume change of the Cu6Sn5@SnO2-C electrode during cycling was relatively small (12.7%) so that the Cu6Sn5 core components and the core/shell structure remained relatively stable over many cycles, leading to significantly enhanced reaction reversibility and cycling stability. (C) 2015 Elsevier Ltd. All rights reserved.
关键词
作者关键词:Lithium ion battery; Core/shell structure; Tin dioxide; Reversibility; Tin-copper intermetallic
作者信息
通讯作者地址:Zhu, M (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510640, Guangdong, Peoples R China. |
地址:
出版商
类别分类
研究方向:Chemistry; Science & Technology - Other Topics; Materials Science; Physics
Web of Science 类别:Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied