Highly defective graphite for scalable synthesis of nitrogen doped holey graphene with high volumetric capacitance
Highly defective graphite for scalable synthesis of nitrogen doped holey graphene with high volumetric capacitance
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DOI：
10.1016/j.jpowsour.2016.10.018
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发表时间：
2016-12
影响因子：
9.2
通讯作者：
Yijie Zhang;L. Ji;Wanfei Li;Zhao Zhang;Luhua Lu;Lisha Zhou;Jinghai Liu;Ying Chen;Liwei Liu-Liwei
中科院分区：
文献类型：
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作者：
Yijie Zhang;L. Ji;Wanfei Li;Zhao Zhang;Luhua Lu;Lisha Zhou;Jinghai Liu;Ying Chen;Liwei Liu-Liwei
近年来，石墨烯基平面结构的调控成为新型能量转换材料设计的研究热点。通过将石墨烯基面中的缺陷尺寸从原子尺度扩展到纳米尺度，可以通过在低浓度下对缺陷氧化石墨烯进行多步氧化和还原来合成具有面内孔的石墨烯。这些复杂且产率低的合成方法极大地限制了多孔石墨烯基高性能能量转换材料的研究和应用。受石墨烯面内空穴形成机制的启发，本文提出了一种简单且可扩展的合成方法。通过高浓度氧化广泛存在的缺陷石墨矿物，可规模化合成多孔氧化石墨烯。通过简单还原多孔氧化石墨烯，得到了具有439 F/cm 3高体积电容的氮掺杂多孔石墨烯。我们相信这一突破可以为进一步探索多孔石墨烯基材料在各个领域的性质和性能提供一种可行的合成方法。
Manipulating basal plane structure of graphene for advanced energy conversion materials design has been research frontier in recent years. By extending size of defects in the basal plane of graphene from atomic scale to nanoscale, graphene with in-plane holes can be synthesized by multiple steps oxidation and reduction of defective graphene oxide at low concentration. These complicated and low yield synthetic methods largely limited research and applications of holey graphene based high performance energy conversion materials. Inspired by graphene in-plane holes formation mechanism, an easy and scalable synthetic approach has been proposed in this work. By oxidizing widely available defective graphite mineral under high concentration, holey graphene oxide has been scalable synthesized. Through simple reduction of holey graphene oxide, nitrogen doped holey graphene with high volumetric capacitance of 439 F/cm3was obtained. We believe this breakthrough can provide a feasible synthetic approach for further exploring the properties and performance of holey graphene based materials in variety of fields.