N,P Dual‐Doped Hierarchically Porous Carbon Derived from a Polyelectrolyte Complex as High‐Performance Electrodes for Supercapacitors
N,P Dual‐Doped Hierarchically Porous Carbon Derived from a Polyelectrolyte Complex as High‐Performance Electrodes for Supercapacitors
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DOI：
10.1002/ente.201800641
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发表时间：
2019-03
影响因子：
3.8
通讯作者：
Ningzhao Shang;Shutao Gao;Xiaoyu Zhang;Shuaihua Zhang;Cheng Feng;Zhi Wang;Chun Wang
中科院分区：
文献类型：
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作者：
Ningzhao Shang;Shutao Gao;Xiaoyu Zhang;Shuaihua Zhang;Cheng Feng;Zhi Wang;Chun Wang
电极材料的表面组成和孔结构对其电化学性能都有显着影响。在此，展示了一种新型氮磷双掺杂分级多孔碳（NP-HPC），通过同时热解和活化以壳聚糖和多磷酸为前体的聚电解质复合物制备。 NP-HPC 具有分层互连的多孔结构、高表面积 (2933 m2g−1) 和杂原子掺杂。由于其独特的特性，最佳的 NP-HPC-800 在 6 mol L−1 KOH 中表现出高比电容（289 F g−1 at 0.5 A g−1）、优异的倍率性能（238 F g−1 at 10 A g−1）和卓越的循环稳定性（5000 次循环后 5 A g−1 保留率为 96%）。此外，NP-HPC-800 在 183.3 W kg−1 的功率密度下表现出 22.5 Wh kg−1 的优异能量密度。低成本且简便的制造工艺提供了一种从生物质前体制备杂原子掺杂碳材料用于能源相关应用的可行方法。
Both the surface composition and the pore texture of electrode materials have a significant effect on their electrochemical performances. Herein, a new type of nitrogen and phosphorus dual‐doped hierarchically porous carbon (NP‐HPC), fabricated by simultaneous pyrolysis and activation of the polyelectrolyte complex with chitosan and polyphosphoric acid as the precursor, is demonstrated. The NP‐HPC has a hierarchically interconnected porous structure, high surface area (2933 m2g−1), and doping of heteroatoms. Due to its unique features, the optimal NP‐HPC‐800 demonstrates a high specific capacitance (289 F g−1at 0.5 A g−1), excellent rate performance (238 F g−1at 10 A g−1), and superior cycling stability (96% retention after 5000 cycles at 5 A g−1) in 6 mol L−1of KOH. Furthermore, NP‐HPC‐800 shows an excellent energy density of 22.5 Wh kg−1at a power density of 183.3 W kg−1. The low‐cost and facile fabrication process provides a feasible approach to prepare heteroatom‐doped carbon materials from a biomass precursor for energy‐related applications.