三维多级孔类石墨烯载三氧化二铁锂离子电池负极材料

采用简单的水解、热处理方法合成三氧化二铁（Fe₂O₃）负载在三维多级孔类石墨烯（3D HPG）上的复合材料. 3D HPG有效的导电网络有利于负载纳米Fe₂O₃，使其呈均匀分散状态，并有效增强纳米复合物的导电率，提高Fe₂O₃利用率，抑制纳米Fe₂O₃的团聚，从而制得稳定、高性能的锂离子电池负极材料. Fe₂O₃-3D HPG电极在50 mA·g^-1电流密度下首次放电容量达1745 mAh·g^-1，50周期放电容量保持于1095 mAh·g^-1.

Nanosized Fe2O3 on Three Dimensional Hierarchical Porous Graphene-Like Matrices as High-Performance Anode Material for Lithium Ion Batteries

Ferric oxide (Fe₂O₃) as a promising anode material for lithium ion battery is due to its high theoretical capacity (1007 mAh·g^-1), earth abundance and low cost. The nanosized Fe₂O₃ on the three dimensional hierarchical porous graphene-like network (denoted as Fe₂O₃-3D HPG) has been synthesized by homogeneous precipitation and heat treatment. The 3D HPG can provide a highly conductive structure in conjunction to support well contacted Fe₂O₃ nanoparticles, and effectively enhance the mechanical strength of the matrices during volume changes, as well as improve the utilization rate of Fe₂O₃ and suppress the aggregation of Fe₂O₃ nanoparticles during Li ion insertion/extraction. As a result, the first discharge capacity of Fe2O3-3D HPG was up to 1745 mAh·g^-1 at 50 mA·g^-1, and after 50 cycles, the retention of the capacity was 1095 mAh·g^-1.