个人信息Personal Information
副教授
硕士生导师
性别:男
毕业院校:哈尔滨工业大学
学位:博士
所在单位:化工海洋与生命学院
学科:化学工程. 能源化工. 功能材料化学与化工
办公地点:D01-312A
联系方式:0427-2631809
电子邮箱:liuanmin@dlut.edu.cn
Study on the synergistic lithium storage performance of Sn/graphene nanocomposites via quantum chemical calculations and experiments
点击次数:
论文类型:期刊论文
发表时间:2017-09-15
发表刊物:APPLIED SURFACE SCIENCE
收录刊物:SCIE、EI、Scopus
卷号:416
页面范围:751-756
ISSN号:0169-4332
关键字:Sn; Graphene; Nanocomposites; Lithium-ion batteries
摘要:A general strategy is demonstrated to achieve superior lithium storage properties by constructing Sn/graphene nanocomposite architecture. The synergistic lithium storage performance of Sn/graphene is initially investigated by quantum chemical calculations based on density functional theory. Results show that the electronic conductivity of Sn/graphene is superior to that of Sn metal. Subsequently, a facile precipitation method is designed to fabricate Sn/graphene composites. SEM and TEM analysis reveals that Sn nanoparticles (40-80 nm) are homogenously sandwiched between graphene nanosheets. Cyclic voltammetry and galvanostatic charge/discharge measurements show that Sn/graphene composites exhibit superior lithium storage capability as compared to bare Sn. The enhanced performance is further investigated by electrochemical impedance spectroscopy. Results suggest that the addition of graphene in the nanocomposites significantly improves the electron transfer, which is consistent with the quantum chemical calculations. (C) 2017 Elsevier B.V. All rights reserved.