Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 16, Issue 10, Pages 3307-3313Publisher
SPRINGER
DOI: 10.1007/s10008-012-1776-6
Keywords
Electrospinning; Porous fibers; Anode; Lithium-ion batteries
Categories
Funding
- National Post-Doctoral Fund of China [20090461013]
- post-doctoral fund of Xiangtan University
- Open Fund from Key Laboratory of Advanced Functional Polymeric Materials of Hunan Province [AFPM200906]
- project of Science and Technology of Hunan Province [2010RS4012]
Ask authors/readers for more resources
Porous lithium titanate (Li4Ti5O12) fibers, composed of interconnected nanoparticles, are synthesized by thermally treating electrospun precursor fibers and utilized as an energy storage material for rechargeable lithium-ion batteries. The material is characterized by X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, and thermal analysis. Scanning electron microscopy results show that the Li4Ti5O12 fibers calcined at 700 A degrees C have an average diameter of 230 nm. Especially, the individual fiber is composed of nanoparticles with an average diameter of 47.5 nm. Electrochemical properties of the material are evaluated using cyclic voltammetry, galvanostatic cycling, and electrochemical impedance spectroscopy. The results show that as-prepared Li4Ti5O12 exhibits good cycling capacity and rate capability. At the charge-discharge rate of 0.2, 0.5, 1, 2, 10, 20, 40, and 60 C, its discharge capacities are 172.4, 168.2, 163.3, 155.9, 138.7, 123.4, 108.8, and 90.4 mAh g(-1), respectively. After 300 cycles at 20 C, it remained at 120.1 mAh g(-1). The obtained results thus strongly support that the electrospun Li4Ti5O12 fibers could be one of the most promising candidate anode materials for lithium-ion batteries in electric vehicles.
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