Hierarchically Macroporous and Mesoporous Sponge-Like Fe3O4 Thin Film Electrodes for Application in Li-Ion Batteries

作者：Yu Yan; Dhanabalan Abirami; Gu Lin; Wang Chunlei^*

来源：Nanoscience and Nanotechnology Letters, 2012, 4(10): 983-988.

DOI：10.1166/nnl.2012.1441

• Hierarchically Macro-Mesoporous
• Electrostatic Spray Deposition (ESD)
• Fe3O4
• Anode
• Li-Ion Batteries

Porous Fe3O4 thin films on a Nickel foam substrate have been prepared using electrostatic spray deposition method and tested as anodes for Li-ion batteries. By changing the solvent used for synthesis of Fe3O4 thin films, different porous structures such as hierarchically macroporous and mesoporous sponge-like films (HP-Fe3O4) and macroporous films (MP-Fe3O4) were obtained. Between the two types of porous structures, HP-Fe3O4 showed better electrochemical performance than the MP-Fe3O4 films. HP-Fe3O4 anode material showed a discharge capacity of 1050 mAh.g(-1) in the first cycle (verses 990 mAh.g(-1) for MP-Fe3O4), and a reversible capacity of 710 mAh.g(-1) after 100 charge-discharge cycles (verses 450 mAh.g(-1) for MP-Fe3O4) was retained at the rate of 1C. This was attributed to good buffering of volume change, increased surface area and better kinetics. The mechanism for the formation of hierarchically macroporous and mesoporous structures was further discussed.

• 出版日期2012-10
• 单位中国科学技术大学