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首页> 外文期刊>International Journal of Electrochemical Science >Synthesis of Porous CoO Nanorods @ N-doped Carbon as High- Performance Lithium Ion Battery Anode
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Synthesis of Porous CoO Nanorods @ N-doped Carbon as High- Performance Lithium Ion Battery Anode

机译：N掺杂碳多孔CoO纳米棒的合成作为高性能锂离子电池阳极

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Construction of porous-structure and carbon coated transition metal oxides is essential for their use aslithium ion battery anodes. In this study, CoO nanorods @ N-doped carbon have been prepared via asynchronous carbonization/reduction of Co3O4 nanorods @ polypyrrole composite. XRD patternssuggest the pure-phase CoO can be obtained when the added amount of pyrrole reaches an amount of180 ?L. SEM and TEM images show CoO with surface carbon layer can well inherit the porousnanorod structure of Co3O4 template, and partial nitrogen is doped into carbon backbone. As lithiumion battery anode, the optimal sample obtained at a pyrrole content of 270 ?L can deliver an initialdischarge capacity of 923.9 mAh g-1 with high Coulombic efficiency of 75.6% at 200 mAg-1, and acapacity value of 841.6 mAh g-1 can be kept after 100 cycles. Even at a high rate of 1000 mAg-1, astable discharge capacity of 570 mAh g-1 can also be reached. These promising electrochemicalperformances may be attributed to the synergistic effect of porous structure and carbon coating.
机译：多孔结构和碳涂层过渡金属氧化物的构造对于其用作锂离子电池阳极至关重要。在本研究中，通过异步碳化/还原Co3O4纳米棒@聚吡咯复合材料，制备了N掺杂碳的CoO纳米棒。当吡咯的添加量达到180μL时，可以得到XRD图谱，表明可以得到纯相CoO。 SEM和TEM图像表明，具有表面碳层的CoO可以很好地继承Co3O4模板的多孔纳米结构，部分氮被掺杂到碳骨架中。作为锂离子电池阳极，吡咯含量为270 µL时获得的最佳样品可以提供923.9 mAh g-1的初始放电容量，在200 mAg-1时的库仑效率高达75.6％，容量值为841.6 mAh g-1可以在100个周期后保存。即使以1000 mAg-1的高速率放电，也可以达到570 mAh g-1的稳定放电容量。这些有希望的电化学性能可能归因于多孔结构和碳涂层的协同作用。

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