Liang Jin, Xiao Chunhui, Chen Xu, Gao Ruixia, Ding Shujiang
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter and Department of Applied Chemistry, School of Science, Xi'an Jiaotong University, Xi'an 710049, People's Republic of China.
Nanotechnology. 2016 May 27;27(21):215403. doi: 10.1088/0957-4484/27/21/215403. Epub 2016 Apr 20.
Nitrogen doping has been demonstrated to play a crucial role in controlling the electronic properties of carbon-based composites. In this paper, nitrogen-doped carbon coated γ-Fe2O3 (NC@γ-Fe2O3) composite was successfully fabricated through a facile and high-yield strategy, including a hydrothermal reaction process for porous γ-Fe2O3 and a subsequent coating of nitrogen-doped carbon by using dopamine as precursor. The resulting composite combines the superior properties of porous Fe2O3 and heteroatom-doped conductive carbon layer derived from polydopamine. When used as the anode material of the lithium-ion battery, the as-prepared NC@γ-Fe2O3 composite exhibits excellent lithium storage properties in terms of high capacity, stable cycling performance (869.6 mAh g(-1) at the current density of 0.5 A g(-1) after 150 cycles) and excellent rate capability.
氮掺杂已被证明在控制碳基复合材料的电子性能方面起着关键作用。本文通过一种简便且高产率的策略成功制备了氮掺杂碳包覆γ-Fe2O3（NC@γ-Fe2O3）复合材料，该策略包括用于制备多孔γ-Fe2O3的水热反应过程以及随后以多巴胺为前驱体包覆氮掺杂碳。所得复合材料结合了多孔Fe2O3的优异性能和源自聚多巴胺的杂原子掺杂导电碳层。当用作锂离子电池的负极材料时，所制备的NC@γ-Fe2O3复合材料在高容量、稳定的循环性能（在0.5 A g(-1)的电流密度下经过150次循环后为869.6 mAh g(-1)）和优异的倍率性能方面表现出出色的锂存储性能。
