Surface reaction of β-FeOOH film negative electrode for lithium-ion cells

• Published in: Journal of power sources Vol. 191; no. 2; pp. 636 - 639
• 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; Negative electrode; Thin film; β-FeOOH; β-FeOOH; Negative electrode; Thin film; Costs; Anode; Solid electrolyte; Film formation; Secondary cell; Electrode material; Iron Hydroxides oxides; Lithium battery; Performance; Electrode capacity
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2009.02.021

Electrochemical performance of β-FeOOH thin film has been investigated for a low-cost and environmentally friendly negative electrode with a large capacity. The electrode was found out to give an initial large discharge capacity of 864 mAh g −1 and good cycleability with a constant value around 700 mAh g −1 at subsequent cycles. In the first charge process, one electron change reaction proceeded from the initial rest potential of 3.04–1.65 V vs. Li/Li +, resulting in the formation of divalent product FeOOHLi. Further charging caused the surface film formation like solid electrolyte interface (SEI) between 1.65 V and 1.18 V vs. Li/Li + together with the reduction of Fe compound from divalent to partially zero-valent, followed by its film growth from 1.18 V to 0.07 V vs. Li/Li +.