Publications Details
Development of Li/(CFx)n battery at sandia national laboratories for long-lived power sources applications
Recent advances in electrode fabrication and tailoring electrolyte properties for numerous applications have generated wide-spread interest in (CFx)x chemistry since it has the highest theoretical capacity and hence longer life of the four well known Li-primary chemistries. We are applying "Li-ion technology" electrode fabrication methodologies and preparing thin film (CFx)n electrodes in-house for evaluation. In this program we have evaluated 4 different (CFx) n materials for performance in coin cells in the temperature regime -55 to 72°C. We continue to evaluate the top performer in 18650 cell configuration and obtained ∼3.6 Ahrs capacity at a C/400 rate. We also evaluated cathodes of different lengths for uniformity of loading. For example, a 36'' long × 4.2 mil thick electrode gave 3.6 Ahrs while a 29'' long × 4.2 mil thick electrode gave 2.9 Ahrs of capacity. We also measured impedance at different voltages and thermal abuse response of the 18650 cells. © The Electrochemical Society.