3D Porous γ‐Fe2O3@C Nanocomposite as High‐Performance Anode Material of Na‐Ion Batteries
3D Porous γ‐Fe2O3@C Nanocomposite as High‐Performance Anode Material of Na‐Ion Batteries
复制标题
DOI：
10.1002/aenm.201401123
复制
发表时间：
2015-03
影响因子：
27.8
通讯作者：
Ning Zhang;Xiaopeng Han;Yong-chang Liu;Xiaofei Hu;Qing Zhao;Jun Chen
中科院分区：
文献类型：
--
作者：
Ning Zhang;Xiaopeng Han;Yong-chang Liu;Xiaofei Hu;Qing Zhao;Jun Chen
采用气溶胶喷雾热解法制备了一种简单的无模板三维多孔γ-Fe2O3@C纳米复合材料。该纳米复合材料包含内部连接的纳米通道和均匀嵌入多孔碳基质中的γ-Fe 2 O3纳米颗粒（5 nm）。γ-Fe 2 O3纳米颗粒的尺寸和碳含量可以通过前驱体溶液的浓度来控制。三维多孔γ-Fe2O3@C纳米复合材料的独特结构提供了协同效应，以减轻应力，适应大的体积变化，防止纳米颗粒聚集，并促进电子和电解质在长时间循环期间的转移。因此，当用作钠离子电池（SIB）的阳极材料时，该纳米复合材料显示出高倍率能力和长期循环能力。三维多孔γ-Fe2O3@C纳米复合材料具有简单的一锅法合成工艺和良好的电化学性能，是一种极具潜力的可充电SIB负极材料。
A simple and template‐free method for preparing three‐dimensional (3D) porous γ‐Fe2O3@C nanocomposite is reported using an aerosol spray pyrolysis technology. The nanocomposite contains inner‐connected nanochannels and γ‐Fe2O3 nanoparticles (5 nm) uniformly embedded in a porous carbon matrix. The size of γ‐Fe2O3 nanograins and carbon content can be controlled by the concentration of the precursor solution. The unique structure of the 3D porous γ‐Fe2O3@C nanocomposite offers a synergistic effect to alleviate stress, accommodate large volume change, prevent nanoparticles aggregation, and facilitate the transfer of electrons and electrolyte during prolonged cycling. Consequently, the nanocomposite shows high‐rate capability and long‐term cyclability when applied as an anode material for Na‐ion batteries (SIBs). Due to the simple one‐pot synthesis technique and high electrochemical performance, 3D porous γ‐Fe2O3@C nanocomposites have a great potential as anode materials for rechargeable SIBs.