Hierarchical nanostructure of RuO2 hollow spheres with enhanced lithium ion storage and cyclic performance

被引：11
作者：
Lee, Won-Jae [1 ]
Chun, Yu-Gyeong [1 ]
Jang, Su-Jin [1 ]
Paek, Seung-Min [1 ]
Oh, Jae-Min [2 ]
机构：
[1] Kyungpook Natl Univ, Dept Chem, Taegu 41566, South Korea
[2] Yonsei Univ, Coll Sci & Technol, Dept Chem & Med Chem, Wonju 26493, South Korea
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 711卷
基金：
新加坡国家研究基金会;
关键词：
Layered compounds; Exfoliation; Nanosheets; Hollow sphere; Energy storage; ELECTROCHEMICAL LITHIATION; ANODE MATERIALS; HIGH-CAPACITY; BATTERIES; CARBON; NANOSHEETS; OXIDE; ELECTRODES; TIN; NANOPARTICLES;
D O I：
10.1016/j.jallcom.2017.04.047
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：
RuO2 hollow spheres as a macroporous model structure for substituting a graphite anode in a lithium ion battery were successfully fabricated by utilizing the electrostatic attraction between exfoliated RuO2 nanosheets and cationic polymers onto the polystyrene (PS) templates. According to the results of scanning electron microscopy, thin RuO2 nanosheets were homogeneously covered onto the polystyrene beads before calcination. Transmission electron microscopy images clearly indicated complete removal of the PS templates after calcination at 500 degrees C for 2 h, leading to RuO2 hollow spheres with a macroporous structure. Electrochemical charge/discharge experiments demonstrated a much larger lithium storage capacity for the RuO2 hollow spheres described here (600 mAh/g) than that of bare rutile RuO2 (340 mAh/g), highlighting the effectiveness of this synthetic technology. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：611 / 616
页数：6
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