Journal
ELECTROCHIMICA ACTA
Volume 176, Issue -, Pages 989-996Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.07.105
Keywords
Titanium dioxide; Carbon nanofiber; Electrospinning; Sodium-ion batteries
Categories
Funding
- Chinese Universities Scientific Fund [CUSF-DH-D-2014007]
- China Scholarship Council (CSC)
- State of North Carolina
- National Science Foundation
Ask authors/readers for more resources
Titanium dioxide (TiO2) is a prospective anode candidate for sodium-ion batteries, owing to the advantages of good chemical stability, elemental abundance and nontoxicity. In this work, TiO2 embedded in carbon nanofiber (TiO2@CNF) composites are prepared for high-performance sodium-ion batteries by electrospinning and subsequent heat treatment in N-2 at different temperatures. With increase in heat-treatment temperature, the diameter of nanofibers decreases and the crystal phase partially transforms from anatase to rutile. Among all composites, the TiO2@CNF composite treated at 550 degrees C has anatase structure and exhibits the highest initial reversible capacity (237.3 mAh g(-1)), largest initial coulombic efficiency (68.2%), and superior capacity retention (100.3%) over 100 cycles at 30 mA g(-1). Whereas, the TiO2@CNF composite treated at 650 degrees C is 28.23% rutile and 71.77% anatase, and shows the best rate capability of 159.1 mAh g(-1) even at current density of 800 mA g(-1). It is, therefore, demonstrated that TiO2@CNF composites prepared with appropriate conditions are superior anode material for sodium-ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available