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Preparation of 3D hierarchical porous Co3O4 nanostructures with enhanced performance in lithium-ion batteries

机译：增强锂离子电池性能的3D分层多孔Co 3 O 4 纳米结构

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Three-dimensional hierarchical Co3O4 microspheres assembled by well-aligned 1D porous nanorods have been synthesized by hydrothermal methods with the help of CTAB and subsequent heat treatment. The morphology and compositional characteristics of the hierarchical Co3O4 microspheres have been investigated using different techniques. Based on the SEM and TEM analyses, the growth direction of the nanorods is in the [110] direction. The hierarchical Co3O4 microspheres have a comparatively large Brunauer–Emmett–Teller surface area of about 50.2 m2g?1, and pore size distribution is mainly concentrated at 12 nm. On the basis of the time tracking experiment, a possible growth mechanism has been proposed. It demonstrates that the overall mechanism includes nucleation, oriented growth and self-assembly processes. These hierarchical Co3O4 microspheres provide several favorable features for Li-ion battery applications: (1) large Brunauer–Emmett–Teller surface area, (2) porous structure, and (3) hierarchical structure. Therefore, measurement of the electrochemical properties indicates that the specific capacity can maintain a stable value of about 1942 mA h g?1 at a current of 100 mA g?1 within 100 cycles.
机译：利用水热法合成了排列良好的一维多孔纳米棒组装的三维分层Co 3 O 4 微球CTAB和后续热处理的辅助方法。使用不同的技术研究了Co 3 O 4 分层微球的形态和组成特征。根据SEM和TEM分析，纳米棒的生长方向为[110]方向。分层的Co 3 O 4 微球的Brunauer-Emmett-Teller表面积较大，约为50.2 m 2 g ？1 ，且孔径分布主要集中在12 nm。在时间跟踪实验的基础上，提出了一种可能的生长机理。它表明总体机制包括成核，定向生长和自组装过程。这些分层的Co 3 O 4 微球为锂离子电池应用提供了几个有利的功能：（1）大Brunauer–Emmett–Teller表面积，（2）多孔结构和（3）层次结构。因此，电化学性能的测量表明，在电流为100 mA g ？1 的稳定值。 >？1 在100个周期内。

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