Study of the Electrochemical Behavior of Different Carbon Materials as Anodes for Lithium Ion Batteries

M. G. ORTIZ,; VISINTIN A.; REAL S.

Buenos Aires

Congreso; 20th Topical Meeting of the International Society of Electrochemistry Advances in Lithium and Hydrogen Electrochemical Systems for Energy Conversion and Storage, 19-22 March 2017, Buenos Aires, Argentina.; 2017

20th Topical Meeting of the International Society of Electrochemistry Advances in Lithium and Hydrogen Electrochemical Systems for Energy Conversion and Storage,

The lithium ion battery was first commercialized by the Sony Corporation in 1991, and its development becomes critical for their improvement in a variety of applications ranging from hybrid electric vehicles to consumer electronic [1]. Most lithium ion commercial batteries use LiCoO2, LiNiO2 or LiFePO4 as cathode material, organic solvent as the electrolyte and carbon composites as anode materials [1-2]. The electrochemical reactions involve Li mass transfer and charge transfer processes. So far, a number of studies have been performed for providing a high performance carbonaceous material as anodes of Li-ion batteries [3]. In this study, from the many available carbonaceous materials we have selected some of them to be prepared as anodes material and to study their electrochemical behavior The carbon electrodes were fabricated by coating a slurry mix on a copper current collector, then dried and pressed. The slurry mix was prepared by mixing 80 wt% of the active material, LiCoO2, LiNiO2 or LiFePO4 powder such as: carbonaceous commercial graphite (Anedra) and graphene (Graphenano), and 10 wt% conductive additive powder (Super C carbon) with the binder solution of n-methylpyrrolidone and 10 wt% poly-vinylidene fluoride (PVDF). These anode materials were characterized employing scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and electrochemical techniques as: cyclic voltammetry, charge-discharge cycles, galvanostatic discharge at different currents and electrochemical impedance spectroscopy. The analysis of all results, allowed us to improve the understanding of their physical, chemical and physic-chemical parameters.