期刊
JOURNAL OF POWER SOURCES
卷 353, 期 -, 页码 237-244出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2017.04.015
关键词
TiO2; Core-shell; N-doped; Anode materials; Electrochemical performance
资金
- National Natural Science Foundation of China [21403195, 21301102]
- Science & Technology Youth-Star Program of Jinan Science & Technology Bureau [2013036]
In this work, sugarapple-like N-doped TiO2@N-doped carbon (NTiO2@NC) core-shell spheres have been synthesized with a facile and effective preparation process using polypyrrole (PPy) as carbon and nitrogen sources. Conductive N-doped carbon with slit pores uniformly coated on the TiO2 spheres surface. Benefiting from the N-doping and carbon shell, NTiO2@NC demonstrates superior long-term cycling stability and high-rate performance as anode materials for lithium ion batteries. Even tested at a current density of 5000 mA g(-1), the NTiO2@NC composites can deliver a reversible capacity of 232.7 mAh g(-1) after 2000 cycles. This new strategy may shed light on preparing metal oxides@NC core-shell composites for Li-ion batteries and other energy storage applications. (C) 2017 Elsevier B.V. All rights reserved.
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