Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, Hunan University, PR China.
Nanoscale. 2012 Jun 7;4(11):3422-6. doi: 10.1039/c2nr30482a. Epub 2012 May 4.
α-Fe(2)O(3) nanowall arrays (NWAs) were grown directly on Ni foam by a facile hydrothermal method. Based on time-dependent experiment results, a possible formation mechanism for this structure was proposed. The as-prepared α-Fe(2)O(3) samples have an open network structure constituted of interconnected nanowalls and can be directly used as integrated electrodes for lithium-ion batteries (LIBs). The unique nanostructural feature is advantageous in electron transport and electrolyte diffusion efficiency, which can accelerate the electrochemical reaction. Thus, compared to a traditional electrode, the unique assembly reduces polarization of the electrode and results in excellent rate performances (440 mA h g(-1) at 5 C).
α-Fe(2)O(3) 纳米墙阵列（NWAs）通过简便的水热法直接在 Ni 泡沫上生长。基于时变实验结果，提出了这种结构的可能形成机制。所制备的 α-Fe(2)O(3) 样品具有由相互连接的纳米墙构成的开放网络结构，可直接用作锂离子电池（LIBs）的集成电极。独特的纳米结构特征有利于电子传输和电解质扩散效率，从而可以加速电化学反应。因此，与传统电极相比，独特的组装方式降低了电极的极化，从而表现出优异的倍率性能（在 5 C 时为 440 mA h g(-1)）。
