β-FeOOH thin film as positive electrode for lithium-ion cells

• Published in: Journal of power sources Vol. 191; no. 2; pp. 640 - 643
• Main Authors: Tabuchi, T., Katayama, Y., Nukuda, T., Ogumi, Z.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.06.2009; Elsevier
• 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; Exact sciences and technology; Liquid phase deposition method; Thin film; β-FeOOH; β-FeOOH; Liquid phase deposition method; Thin film; Costs; Liquid phase deposition; Electrode discharge; Cathode; Secondary cell; Electrode material; Iron Hydroxides oxides; Lithium battery; Performance; Lithium ion
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2009.02.022

β-FeOOH thin film was prepared on the surface of a foamed Ni substrate by liquid phase deposition (LPD) method with a chemical equilibrium reaction between metal-fluoro complex and oxyhydroxide to make a low-cost and environmentally friendly positive electrode for high-power batteries. The new film electrode, with a thickness of 316 nm, was found out to give a large discharge capacity of 260 mAh g −1 at 0.05 C rate even without an electro-conductive material. Furthermore, the electrode also showed good discharge performance with the retention of 69.9% at 10–0.05 C current rate, which means a promising positive active material for high-power use.