Zhang Xiangjin, Shen Na, Yao Zongchen, Wu Ruoyu
School of Mechanical Engineering, Nanjing University of Science and Technology Nanjing 210094 China
National Key Laboratory of Transient Physics, Nanjing University of Science and Technology Nanjing 210094 China.
RSC Adv. 2020 Mar 20;10(19):11339-11347. doi: 10.1039/d0ra01610a. eCollection 2020 Mar 16.
Carbon materials with porous structures with their unique surface area and charge transport properties have been attracting significant attention as electrode materials in renewable energy storage devices. The rapid agglomeration of layered materials during electrochemical processes reduces their shelf life and specific capacitance, which can be prevented by the introduction of suitable pores between the layers. In this study, resorcinol-based porous resin carbon was facilely prepared a simple carbonization of the potassium salts of resorcinol-potassium resin. The morphology, structure and surface properties of the carbon materials were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), N adsorption and energy dispersive spectroscopy (EDS). It is proposed that the fast nucleophilic addition between the phenols and formaldehyde produces nano-sized gel particles, followed by carbonization into carbon particles, finally packing to the mesopores. Due to the synergistic effects of the tailored porosity and O-doping, the prepared carbon materials show a high specific capacitance (198 F g for RC700), good capacitance retention (96.5% for RC700) at 2 A g in 6 M KOH and the specific area of RC700 is 540 m g.
具有多孔结构及其独特表面积和电荷传输特性的碳材料，作为可再生储能装置中的电极材料，一直备受关注。层状材料在电化学过程中的快速团聚降低了它们的保质期和比电容，而在层间引入合适的孔隙可以防止这种情况。在本研究中，通过对间苯二酚 - 钾树脂的钾盐进行简单碳化，轻松制备了基于间苯二酚的多孔树脂碳。使用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、N吸附和能量色散光谱（EDS）对碳材料的形态、结构和表面性质进行了研究。研究表明，酚类与甲醛之间的快速亲核加成产生纳米级凝胶颗粒，随后碳化形成碳颗粒，最终堆积到中孔中。由于定制孔隙率和O掺杂的协同效应，所制备的碳材料在6 M KOH中2 A g时显示出高比电容（RC700为198 F g）、良好的电容保持率（RC700为96.5%），且RC700的比表面积为540 m g。
