Improvements of the electrochemical features of graphite fluorides in primary lithium battery by electrodeposition of polypyrrole

• Published in: Electrochemistry communications Vol. 13; no. 10; pp. 1074 - 1076
• Main Authors: Groult, H., Julien, C.M., Bahloul, A., Leclerc, S., Briot, E., Mauger, A.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 2011; Amsterdam Elsevier; New York, NY
• Subjects: Applied sciences; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrodeposition; Exact sciences and technology; Graphite fluorides; Physics; Polypyrrole; Primary lithium battery; Quantum Physics; Electrodeposition; Graphite fluorides; Polypyrrole; Primary lithium battery; Primary batteries; Power density; Organic carbonate; Secondary cell; Graphite Fluorides; Electrode material; X ray diffraction; Lithium battery; Conducting polymers; Lithium Hexafluophosphates; Electrochemical reaction; Pyrrole polymer; Electrical characteristic; graphite fluorides; polypyrrole; primary lithium battery
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2011.06.038

Improvements of the electrochemical features of CF x cathode materials in primary lithium battery were obtained by the electrodeposition of polypyrrole (PPy) performed in acetonitrile with Py monomer. The electrodeposition does not affect the core of the CF x powder as revealed by XRD and TEM. The maximum discharge rate which is 1C for pristine CF x increases for PPy–CF x and reaches 4C in the case of PPy–CF 0.80 1 M LiPF 6–EC:DMC (1:1) electrolyte. A maximum power density of 5235 W/kg (4C-rate) has been achieved with PPy–CF 0.80, a value around 3.8 times higher than for CF 0.80 (1C-rate). Ragone plots for CF 0.8 and PPy–CF 0.8. [Display omitted] ► In this study, polypyrrole (PPy) was electrodeposited on CF x powders. ► XRD and TEM measurements did not reveal any core modifications. ► Pristine CF x and PPy–CF x were tested as cathode materials in primary lithium battery. ► A maximum power density of 5235 W/kg (4C-rate) has been achieved for PPy–CF 0.80. ► This value is around 3.8 times higher than for pristine CF 0.80 (1C-rate).