期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 517, 期 -, 页码 134-143出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.02.001
关键词
N-doped carbon layer; Dopamine; TiO2; Coated; Sodium ion battery
资金
- National Natural Science Foundation of China [21171174, 21505035]
- Provincial Natural Science Foundation of Hunan [2016JJ3028]
- Scientific Research Projects of Education Department of Hunan Province [16A029]
- Hengyang Normal University [16D04]
- Hunan Provincial Science and Technology Plan Project [2017TP1001]
N-doped carbon coated TiO2 nanoparticles (TiO2@NC) were synthesized through a simple two-step route, in which dopamine was simultaneously utilized as both nitrogen and carbon sources. With TiO2@NC applied in the Na-ion battery (SIB) anodes, the continuous and uniform N-doped carbon layer can not only enhance the electrical conductivity of TiO2 and facilitate the surface pseudocapacitive process, but also serve as a buffer layer to accommodate the volume expansion during the sodiation-desodiation processes. The as-prepared TiO2@NC exhibits excellent electrochemical performance when utilized as the SIB anodes, which delivers a remarkably high reversible capacity of 250.2 mAh g(-1) at a rate of 0.25C (84 mA g(-1)) after 200 cycles and still retains 122.1 mAh g(-1) at 10C (3.35 A g(-1)) even after 3000 cycles accompanied with a 95.3% retention of the maximum capacity, outperforming most of the reported TiO2/C-based composites as SIB anodes. To our best knowledge, the preparation of TiO2@NC with dopamine as both nitrogen and carbon sources and its application in the SIB anodes are reported for the first time. (C) 2018 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据