Abstract
Highly uniform and tight adhering of Fe3O4 particles on carbon fiber film (Fe3O4/CFF) is achieved through a simple in-situ thermal oxidation method. Particularly, 3D CFF with interconnected structure can shorten transfer path and buffer the volume expansion during charge-discharge cycling. Herein, the obtained Fe3O4/CFF anode exhibits a stable cycling performance and excellent high rate capability. The cell delivers a reversible capacity of 1 711 mAh·g–1 at a current density of 100 mA·g–1 after 100 cycles. Even at a high rate density of 2 A·g–1, the specific capacity also can maintain 1 034 mAh·g–1 after 100 cycles. The simplified fabrication is featured with low-cost and this binder-free perspective holds great potential in mass-production of high-performance metal oxide electrochemical devices.
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