Study of the electrochemical behavior at low temperatures of green anodes for Lithium ion batteries prepared with anatase TiO2 and water soluble sodium carboxymethyl cellulose binder

• Published in: Electrochimica acta 2012-12, Vol.85, p.566-571
• Main Authors: Mancini, M., Nobili, F., Tossici, R., Marassi, R.
• Format: Article
• Language: English
• Subjects: Anatase; Anatase TiO2; Anodes; Applied sciences; Binder; Binders; Carboxymethyl cellulose (CMC); Chemistry; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemistry; Electrodes; Exact sciences and technology; General and physical chemistry; Lithium-ion batteries; Lithium-ion battery; Low temperature; Polyvinylidene fluorides; Sodium carboxymethyl cellulose; Titanium dioxide
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2012.08.115

► Water soluble CMC and PVDF binders are used to prepare anatase TiO2 electrodes. ► The electrochemical behavior of the different electrodes is studied between 20 and −30°C. ► CMC/TiO2 anodes show lower ICL, lower polarization and higher low-temperature capacity at high rates than PVDF/TiO2 anodes. ► Electrochemical Impedance Spectroscopy results show better kinetics for CMC/TiO2 electrodes. The electrochemical behavior at low temperatures of anatase TiO2 electrodes for Lithium ion batteries have been evaluated by galvanostatic cycles in the temperature range 20 to −30°C. Two different manufacturing processes have been used to prepare anatase anodes containing water soluble sodium carboxymethyl cellulose (CMC) or poly(vinilydene fluoride) (PVDF) as binder. The low temperature performances at different charge/discharge rates of TiO2/CMC and TiO2/PVDF electrodes are compared and discussed in terms of irreversible capacity loss (ICL) at the first cycle, capacity retention and reversible capacity. The kinetics of the electrodes containing CMC or PVDF is evaluated by Electrochemical Impedance Spectroscopy.