Impedance diagnostics of lithium—thionyl chloride power sources

Life prediction of lithium thionyl chloride batteries based on the pulse load test and accelerated degradation test

“…Concerning temperature, 21 developed an Arrhenius type relation to explain the capacity loss of Li/SOCl 2 batteries with storage time and aging temperature, expressed as 𝐶(𝑡, 𝑇) = 𝐶 0 − 𝑘 0 𝑡e −(𝐸∕𝑅𝑇) (7) where C(t,T) is the capacity loss at the time 't' and temperature 'T', and the initial capacity is defined as C 0 . The parameters, acceleration factor 'k 0 ', and activation energy 'E' were obtained from the least squares fit from a plot of the logarithm of the capacity loss obtained experimentally versus the inverse of the aging temperature.…”

“…A deeper discharge is not accompanied by any significant change in impedance characteristics. It is just at a very deep discharge, close to 100%, which the change in impedance characteristics can be observed 7–9 . Second, the impedance measurement result is seriously affected by the passive film.…”

“…It is just at a very deep discharge, close to 100%, which the change in impedance characteristics can be observed. [7][8][9] Second, the impedance measurement result is seriously affected by the passive film. Due to the strong oxidation capacity of thionyl chloride, the lithium anode passivates when stored, leading to irreproducible results and the loss of the expected correlation between battery capacity and its impedance characteristics.…”

Observing the Effect of Architecture on Spiral and Bobbin Lithium Thionyl Chloride (Li/SOCl2) Batteries with Temperature-Dependent Electrochemical Impedance Spectroscopy (EIS)

“…9 In a study by Kanevskii, SoC (state of charge) determination of lithium thionyl chloride batteries was investigated with impedance spectroscopy. 13 In another study by Wang et al pore structures on the cathode and degradation mechanisms were investigated. 14 Furthermore, research based on the passivation layer and voltage drop in thionyl chloride batteries was conducted by Walsh et al 15 Moreover, a study by Mogensen showed the passivation layer and porous carbon cathode behavior at different electrolyte compositions.…”