Development of high energy density small flat spiral cells and battery pack based on lithium/carbon monofluoride (Li/CF x )

• Published in: Journal of power sources Vol. 162; no. 2; pp. 841 - 846
• Main Authors: Eweka, E.I., Giwa, C.O., Mepsted, G.O., Green, K., Scattergood, D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 22.11.2006; Elsevier Sequoia
• Subjects: Applied sciences; Battery; Carbon monofluoride; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Exact sciences and technology; Lithium; Spiral-wound cells; Lithium; Spiral-wound cells; Carbon monofluoride; Battery; Lithium battery; Electrochemical cell; Energy density; Carbon fluorides; Performance
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2005.07.062

Small spiral-wound lithium–carbon monofluoride (Li/CF x ) cells, which were discharged at the C/40 rate, had a nominal capacity of 300 mAh and a gravimetric energy density of about 464 Wh kg −1. These cells delivered pulse current loads (>22 mA) with good capacity (>200 mAh) if they were subjected to a pre-discharge step. A 17 V, 2.2 kW battery based on Li/CF x flat cell technology has also been fabricated and tested. The battery had gravimetric and volumetric energy densities of 360 Wh kg −1 and 700 Wh dm −3, respectively. This compares with a value of 330 Wh kg −1 and 522 Wh dm −3 for an equivalent battery based on Li/SOCl 2.