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Nitrogen-rich graphene from small molecules as high performance anode material

机译：来自小分子的富氮石墨烯作为高性能阳极材料

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摘要

Nitrogen-rich graphene sheets were successfully achieved via facile thermal condensation of glucose and dicyandiamide at different temperatures during which dicyandiamide acts both as nitrogen source and sacrifice template. Devoid of surfactants or poisonous organic solvents, this small-molecule synthetic approach is a simple and cost-effective way to obtain nitrogen-rich graphene sheets (NRGS) with high specific surface area and large pore volume. Shown to be a promising anode material, the NRGS displayed high reversible capacity, excellent rate capability, and superior cycle performance. The superior lithium-storage performance is ascribed to the unique features of NRGS, including a large quantity of defects due to the high nitrogen doping level, favorable lithium ion transportation channels by virtue of the large surface area, and ultrahigh pore volume, as well as the crumpled two-dimensional structure.
机译：富氮的石墨烯片材是通过在不同温度下将葡萄糖和双氰胺同时用作氮源和牺牲模板的简单热缩合而成功获得的。由于没有表面活性剂或有毒的有机溶剂，这种小分子合成方法是获得具有高比表面积和大孔体积的富氮石墨烯片（NRGS）的简单且经济高效的方法。 NRGS被证明是很有前途的负极材料，显示出高可逆容量，出色的倍率性能和出色的循环性能。优异的锂存储性能归因于NRGS的独特功能，包括由于高氮掺杂水平而导致的大量缺陷，由于表面积大，有利的锂离子传输通道以及超高孔体积以及弄皱的二维结构。

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