Sodium-ion batteries have attracted much attentions in recent years and are anticipated to become the next-generation power supply for mobile electronic device because of the rich natural sources and low cost of sodium element. However, the large volume changes of anodes during continuous charging-discharging as well as thir low conductivity hinder the applications of sodium-ion batteries. In this work, sheet-like γ-FeOOH are electrochemically deposited on the commercially available carbon cloth to fabricate CC-FeOOH composites as anode in sodium-ion battery. The FeOOH on carbon cloth present vertically intersecting nanosheet structure, which allows fast Na+ transport among the nanosheets. The carbon cloth not only provides the good conductivity, but also prevents the detaching of FeOOH nanosheets from the CC substrate during charging and discharging process. Due to the nanosheet morphology of γ-FeOOH and the good conductivity of carbon cloth, the CC-FeOOH-3h electrode exhibits high specific capacity, long cycle life, and excellent rate performance. It delivers a specific capacity of 684 mA·h/g and 181 mA·h/g after cycling 100 and 500 times at a current density of 0.1 A/g and 1 A/g, respectively. Moreover, a specific capacity of 135 mA·h/g can still be retained even at a high current density of 5 A/g. The fabricated CC-FeOOH electrode is expected to become a high-performance anode for future sodium ion batteries.

carbon cloth; FeOOH nanosheets; electrochemical deposition; anode; sodium-ion batteries