Scalable synthesis of nano-sandwich N-doped carbon materials with hierarchical-structure for energy conversion and storage
Scalable synthesis of nano-sandwich N-doped carbon materials with hierarchical-structure for energy conversion and storage
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用于能量转换和存储的具有分级结构的纳米夹心氮掺杂碳材料的可扩展合成
DOI：
10.1039/c6ra12283c
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发表时间：
2016-09
期刊：
影响因子：
3.9
通讯作者：
Wang Yaobing
中科院分区：
文献类型：
--
作者：
Ding Kui;Liu Qin;Bu Yakun;Huang Yiyin;Lv Jiangquan;Wu Jing;Abbas Syed Comail;Wang Yaobing
不断增长的能源需求促使我们探索廉价、可持续和高效的能源转换和储存材料，但制备具有可调谐纳米结构的纳米级碳材料的策略有限。在这项工作中，通过少量氧化石墨烯（GO）原位碳化葡萄糖，然后用NH3活化，合成了一种大规模的纳米三明治（多孔碳/石墨烯/多孔碳）掺杂碳材料。得到的纳米夹层掺n碳材料（nncm）具有可变的纳米孔（0.8-5 nm）和高表面积（808-1959 m2 g−1），以及氮组分（1.87-4.63 at%），可以通过工艺条件很好地调节。优化后的NNCM-1050-70具有优异的ORR性能，具有高起始电位（0.26 V vs. Ag/AgCl）和大极限电流密度（0.6 V vs. Ag/AgCl时4.1 mA cm−2）；在中性条件下获得的最大功率密度（985.3 mW m−2）高于商用Pt/C催化剂（874.3 mW m−2）。当用作超级电容器电极材料时，在6 mol L−1 KOH溶液中，当电流密度为1 a g−1时，NNCM-900-70的比电容达到178 F g−1。此外，NNCM-1050-70对H2和C2H2的吸附性能也优于最佳的碳材料。优异的性能加上可扩展、简便和绿色的方法，使我们合成了用于能量转换和储存的多功能碳纳米材料。
Increasing energy demands led us to explore cheap, sustainable and efficient materials for energy conversion and storage, but limited strategies have been established to prepare nanoscale carbon materials with tunable nanostructures. In this work, a large-scale nano-sandwich (porous carbon/graphene/porous carbon) N-doped carbon material was synthesized by in situ carbonization of glucose with small amounts of graphene oxide (GO), followed by activation with NH3. The resulting nano-sandwich N-doped carbon materials (NNCMs) possess variable nano-pores (0.8–5 nm) and high surface area (808–1959 m2 g−1), as well as nitrogen moieties (1.87–4.63 at%), which can be well tuned by the route conditions. The optimum NNCM-1050-70 exhibited excellent ORR performance with a high onset potential (0.26 V vs. Ag/AgCl) and a large limiting current density (4.1 mA cm−2 at 0.6 V vs. Ag/AgCl); in neutral conditions the obtained maximum power density (985.3 mW m−2) was higher than that of commercial Pt/C catalysts (874.3 mW m−2). When used as electrode materials for supercapacitors, the optimum NNCM-900-70 demonstrated remarkable performance with a specific capacitance of 178 F g−1 at a current density of 1 A g−1 in 6 mol L−1 KOH solution. Moreover, the NNCM-1050-70 also shows excellent performance of H2 and C2H2 adsorption compared to the best carbon materials. The excellent performance coupled with a scalable, facile and green method lead us to synthesize multifunctional carbon nanomaterials for energy conversion and storage.
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影响因子：
29.4
作者：
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影响因子：
11.4
作者：
Dong, Heng;Yu, Hongbing;Wang, Xin
通讯作者：
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