Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
ISSN-L : 1344-3542
Communication
High-rate Lithium Intercalation into Composite Electrodes of Crystalline β-FeOOH and Carbon Powder
Hideyuki MORIMOTOKazuhiko TAKENOYuuki UOZUMIKen-ichi SUGIMOTOShin-ichi TOBISHIMA
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2005 Volume 73 Issue 5 Pages 336-338

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Abstract

Composite electrode material of crystalline β-FeOOH with a (2×2) tunnel-type structure and carbon was prepared by hydrolyzing of 0.1 mol dm-3 FeCl3 aqueous solution in which carbon powder was dispersed. The composite electrode material of fineβ-FeOOH particles and Ketjen black (KB: specific surface area 1270 m2 g-1) of high specific surface area exhibited the high capacity of more than 250 mAh g-1 per β-FeOOH weight and good cycle performance at rapid charge-discharge current density of 5.0 mA cm-2 (4.5 A g-1 per β-FeOOH weight) in nonaqueous electrolytes including lithium ions. Composite electrode with KB powder exhibited high capacities compared to that with acetylene black (AB) powder. Composite electrode materials of crystalline β-FeOOH and carbon are one of the promising candidates as electrode materials for energy storage devices such as hybrid capacitors that high-power operations are required.

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© 2005 The Electrochemical Society of Japan
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