Biotemplated fabrication of hierarchically porous NiO/C composite from lotus pollen grains for lithium-ion batteries
Biotemplated fabrication of hierarchically porous NiO/C composite from lotus pollen grains for lithium-ion batteries
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DOI：
10.1039/c2jm16935e
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发表时间：
2012-04
影响因子：
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通讯作者：
Yang Xia;Wenkui Zhang;Zhen Xiao;Hui Huang;H. Zeng;Xiaorong Chen;Feng Chen;Y. Gan;X. Tao
中科院分区：
文献类型：
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作者：
Yang Xia;Wenkui Zhang;Zhen Xiao;Hui Huang;H. Zeng;Xiaorong Chen;Feng Chen;Y. Gan;X. Tao
本论文以天然多孔性莲花花粉为碳源和模板，采用生物模板法成功合成了多级孔NiO/C微球。所制备的多级多孔NiO/C微球具有较大的比表面积和多种孔径分布，可有效增加电化学反应面积，提高电解液的渗透性。拉曼光谱的结果也证实了花粉粒已经被很好地包裹，这可以提供良好的电子传导性。在0.1、0.5、1和3 A g-1下每10次循环后，多孔NiO/C微球的比容量为约698、608、454和352 mAh g-1。作为锂离子半电池的负极材料，这些独特的混合分级多孔NiO/C微球表现出迷人的电化学性能。
In this work, hierarchically porous NiO/C microspheres were successfully synthesized via a facile biotemplating method using natural porous lotus pollen grains as both the carbon source and the template. The as-prepared hierarchically porous NiO/C microspheres exhibited a large specific surface area and multiple pore size distribution, which could effectively increase the electrochemical reaction area and allow better penetration of the electrolyte. The Raman results also confirmed that the pollen grains have been well carbonized, which could provide good electronic conductivity. The specific capacities of the porous NiO/C microspheres after every 10 cycles at 0.1, 0.5, 1, and 3 A g−1 are about 698, 608, 454 and 352 mAh g−1. As an anode material in a Li ion half-cell, these unique hybrid hierarchically porous NiO/C microspheres exhibited fascinating electrochemical performance.