Abstract：
New binary carbon composites (GDY-NCNTs and GDY-CNTs) with a three-dimensional porous structure, which are synthesized by an in situ growth method, are adopted in this article. The GDY-NCNTs composites exhibit excellent specific capacitance performance (679 F g-1, 2 mV s-1, 139% increase compared to GDY-CNTs) and good cycling stability (with a capacity retention rate of up to 116% after 10000 cycles). The three-dimensional porous structure not only promotes ion transfer and increases the effective specific surface area to improve its specific capacitance performance but also adapts to the volume expansion and contraction during the charging and discharging process to improve its cycling stability. The presence of nitrogen doping in the carbon nanotubes of GDY-NCNTs increases the surface defects of the composites, provides more electrochemical points, and improves the surface wettability of the composites, further improving the electrochemical performance of the composites.
摘要：
具有三维多孔结构的新型二元碳复合材料（GDY-NCNTs和GDY-CNTs），通过原位生长方法合成，在本文中被采纳。GDY-NCNT复合材料表现出优异的比电容性能(679Fg-1,2mVs-1,与GDY-CNT相比增加了139%)和良好的循环稳定性(10000次循环后的容量保持率高达116%)。三维多孔结构不仅促进了离子迁移，增加了有效比表面积，提高了比电容性能，而且适应了充放电过程中的体积膨胀和收缩，提高了循环稳定性。GDY-NCNTs碳纳米管中氮掺杂的存在增加了复合材料的表面缺陷,提供更多的电化学点，并提高了复合材料的表面润湿性，进一步提高复合材料的电化学性能。
