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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Hierarchical porous carbon microrods composed of vertically aligned graphene-like nanosheets for Li-ion batteries
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Hierarchical porous carbon microrods composed of vertically aligned graphene-like nanosheets for Li-ion batteries

机译:用于锂离子电池的垂直排列的类石墨烯纳米片组成的多层多孔碳微棒

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摘要

Preventing the stacking of ultrathin 2D carbon nanostructures is a very important research theme in the field of energy storage. In this work, hierarchical porous carbon microrods (HPCMs) composed of vertically aligned graphene-like nanosheets are successfully fabricated via a facile Mg(OH)(2)-templating method. The unique structure of the HPCMs is a desirable combination of 1D hierarchical structures, vertically aligned graphenes, and porous graphenes. With the hierarchical structure and pores, high specific surface area, large pore volume, and ideal charge transport and ion diffusion pathways, HPCMs are potential candidates for high-performance electrode materials. When used as an anode for Li-ion batteries, the HPCM electrode exhibits excellent capability (1150 mA h g(-1) at 0.1 A g(-1)), rate performance (246 mA h g(-1) at 10 A g(-1)), and cycling stability (833 mA h g(-1) after 700 cycles at 1 A g(-1)), with measurements superior to those of natural graphite and many graphene-based anodes.
机译:防止超薄二维碳纳米结构的堆叠是储能领域中非常重要的研究主题。在这项工作中,通过简便的Mg(OH)(2)模板化方法成功地制造了由垂直排列的石墨烯状纳米片组成的分层多孔碳微棒(HPCM)。 HPCM的独特结构是一维分层结构,垂直排列的石墨烯和多孔石墨烯的理想组合。 HPCM具有分层的结构和孔,高的比表面积,大的孔体积以及理想的电荷传输和离子扩散途径,是高性能电极材料的潜在候选者。当用作锂离子电池的阳极时,HPCM电极表现出出色的性能(在0.1 A g(-1)时为1150 mA hg(-1)),速率性能(在10 A g(246 mA hg(-1))下) -1))和循环稳定性(在1 A g(-1)下700次循环后的833 mA hg(-1)),其测量结果优于天然石墨和许多基于石墨烯的阳极。

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