High-rate Charge-discharge Performances of β-FeOOH-carbon composite electrodes

摘要

Composite electrode material of crystalline β-FeOOH and carbon was prepared by hydrolyzing of FeCl_3 (aq.) in which carbon powder with various specific surface areas was dispersed. Composite electrode material of β-FeOOH fine particles and Ketjen black (KB:specific surface area 1270 m~2 g~(-1)) of high specific surface area exhibited the high capacity over 250 mAh g~(-1) per β-FeOOH weight and good cycle performances at rapid charge-discharge current density over 5 mA cm~(-2) (ca. 5.0 A g~(-1) per β-FeOOH weight) in nonaqueous electrolytes including lithium ions. Composite electrode materials of crystalline β-FeOOH and carbon are one of the promising candidates as electrode materials for energy storage devices that high-power operations are required.