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.
Study of the electrochemical behaviour at low temperatures of green anodes for Lithium ion batteries prepared with anatase TiO2 and water soluble sodium carboxymethyl cellulose binder
NOBILI, Francesco;TOSSICI, Roberto;MARASSI, Roberto
2012-01-01
Abstract
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
