Li Zhiwei, Chen Nannan, Mi Hongyu, Ma Junhong, Xie Yahong, Qiu Jieshan
Xinjiang Uygur Autonomous Region Key Laboratory of Coal Clean, Conversion and Chemical Engineering Process, School of Chemistry and Chemical Engineering, Xinjiang University, Urumqi, 830046, P.R. China.
School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, 710049, P.R. China.
Chemistry. 2017 Sep 27;23(54):13474-13481. doi: 10.1002/chem.201702544. Epub 2017 Sep 5.
Architectural design of nitrogenous polymer-based carbons represents a facile and efficient strategy to improve performance because of their morphological diversity, tailorability, and N-containing structure. In this research, 0D and 1D forms of polypyrrole-derived porous carbons (A-PCS and A-PCT, respectively) are first integrated into nitrogen-doped hierarchically porous A-PCS/PCT hybrids by applying an easy multistep method. This integration, along with chemical activation, prevents serious agglomeration of carbon particles or tubes and creates a connected porous network structure, leading to improved textural properties (high surface area of 1684 m g , high pore volume of 1.57 cm g , and hierarchical porosity). Thus, A-PCS/PCT hybrids in a three-electrode setup reach high specific capacitances of 224 and 206 F g at 1 and 20 A g , respectively, with high rate capability (92 % capacitance retention). A symmetrical supercapacitor with A-PCS/PCT electrodes presents the highest power and energy densities of 12.6 kW kg and 8.58 Wh kg , respectively, and exceptional cycling life and stability with 92.4 % retention for up to 20 000 cycles. This study on conductive polymer-based hybrid materials may guide the design of architectures with new structures for applications in energy storage and conversion technologies.
基于含氮聚合物的碳材料的结构设计是一种简便而有效的性能提升策略，这得益于它们形态的多样性、可定制性以及含氮结构。在本研究中，首先通过一种简单的多步方法，将0维与1维的聚吡咯衍生多孔碳（分别为A-PCS和A-PCT）整合到氮掺杂的分级多孔A-PCS/PCT杂化材料中。这种整合，连同化学活化，可防止碳颗粒或碳管的严重团聚，并形成连通的多孔网络结构，从而改善了结构性质（高比表面积为1684 m²/g，高孔容为1.57 cm³/g，以及分级孔隙率）。因此，在三电极装置中的A-PCS/PCT杂化材料在1 A/g和20 A/g时分别达到224和206 F/g的高比电容，具有高倍率性能（电容保持率为92%）。具有A-PCS/PCT电极的对称超级电容器分别呈现出最高功率密度12.6 kW/kg和能量密度8.58 Wh/kg，以及出色的循环寿命和稳定性，在高达20000次循环中保持率为92.4%。这项关于基于导电聚合物的杂化材料的研究可能会指导具有新结构的架构设计，以应用于能量存储和转换技术。
