Surficial nanoporous carbon with high pyridinic/pyrrolic N-Doping from sp(3)/sp(2)-N-rich azaacene dye for lithium storage
Surficial nanoporous carbon with high pyridinic/pyrrolic N-Doping from sp(3)/sp(2)-N-rich azaacene dye for lithium storage
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用于锂存储的来自 sp(3)/sp(2)-N 富氮杂苯染料的具有高吡啶/吡咯 N 掺杂的表面纳米多孔碳
DOI：
10.1039/c7ra07850a
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Huang Wei
中科院分区：
文献类型：
--
作者：
Zhao Jianfeng;Chen Kai;Yang Bing;Zhang Yanni;Zhu Caixia;Li Yinxiang;Zhang Qichun;Xie Linghai;Huang Wei
合理设计的吡啶/吡咯型N掺杂对阳极碳质材料具有重要意义，但对于锂储存材料却很少见。在这里，通过直接裂解高SP3/SP2-N含量(13.6wt%)的氮杂苯染料，预测获得了两种高度吡啶/吡咯氮掺杂的碳材料，即原始材料(NC，N含量10.9wt%)和模板(NPC，N含量12.6wt%)。它们的吡啶和吡咯酸总量高达7at%(NC)/6.98at%(NP)，接近理论值(9.1at%)，且有较少或没有石墨化氮。在100mA g−1的第三次循环中，两种材料的容量分别为1094.79 mA h g−1和411.3 mA h g−1。该电极不仅在100 mA g−1电流密度下表现出高达1178.9 mA h g−1的首次可逆放电比容量，而且在200 mA g−1电流密度下循环200次后稳定在614 mA h g−1。结果表明，SP3/SP2-N富氮杂苯染料可作为高性能阳极材料的高吡啶/吡咯型氮掺杂碳源。
Rationally designed pyridinic/pyrrolic N-doping of anodic carbonaceous materials is significant but rare for lithium storage materials. Herein, two highly pyridinic/pyrrolic N-doped carbon materials i.e. the pristine material (NC, N content 10.9 wt%) and template (NPC, N content 12.6 wt%) are predictively achieved by the direct pyrolyzation of the azaacene dye with a high sp3/sp2-N content (13.6 wt%). Their total amount of pyridinic and pyrrolic content is as high as 7 at% (NC)/6.98 at% (NPC), which is close to the theoretical value (9.1 at%) with less/no graphitic N. Both of them present higher capacities of 1094.79 mA h g−1 and 411.3 mA h g−1, respectively, by the 3rd cycle at 100 mA g−1. Featured by surficial bumps and hollows of NPC particles, the NPC electrode not only exhibits a first reversible specific discharge capacity as high as 1178.9 mA h g−1 at a 100 mA g−1 current density but is also stabilized at 614 mA h g−1 after 200 cycles at a 200 mA g−1 current density. Our results indicate that the sp3/sp2-N-rich azaacene dye can be a useful highly pyridinic/pyrrolic N-doped carbon source for high performance anodic materials.