Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 16, Issue 12, Pages 3915-3921Publisher
SPRINGER
DOI: 10.1007/s10008-012-1831-3
Keywords
Spinel lithium titanate; Carbon nanofibers; Rate capability; Conductive network; Anode material; Li-ion batteries
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Funding
- Zijin Program of Zhejiang University, China
- Fundamental Research Funds for the Central Universities [2010QNA4003]
- Ph.D. Programs Foundation of Ministry of Education of China [20100101120024]
- Foundation of Education Office of Zhejiang Province [Y201016484]
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A Li4Ti5O12/carbon nanofibers (LTO/CNFs) composite has been synthesized by solid-state reaction with the in situ growth of CNFs using the chemical vapor deposition method in N-2/C2H2. The nanocomposite is characterized by X-ray powder diffraction, field emission scanning electron microscopy, transmission electron microscopy, Raman spectrum, and nitrogen adsorption/desorption isotherms, and is investigated as an anode material for lithium-ion (Li-ion) batteries. The underlying mechanism for the improvement is analyzed by cyclic voltammetry and electrochemical impedance spectroscopy. The in situ synthesized composite shows better electrochemical performance than the bare LTO. The in situ formation of CNFs not only supply an efficient electronic conductive network but also reduce the particle size of LTO and increase in specific surface area, leading to increased electrical conductivity and rapider Li-ion diffusion in electrode/electrolyte interface and bulk electrode.
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