以优异的倍率性能控制 PANI@Carbon 的形态和结构用于超级电容器,ACS Applied Energy Materials

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以优异的倍率性能控制 PANI@Carbon 的形态和结构用于超级电容器
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2022-03-22 , DOI: 10.1021/acsaem.1c03478
Guosai Jiang ₁ , Jiaqi Cai ₁ , Mohanapriya Krishnamoorthy ₁ , Raja Arumugam Senthil ₁ , Yanzhi Sun ₁ , Xifei Li ₂ , Junqing Pan ₁

Affiliation

制备具有独特形态、适当孔径分布和杂原子掺杂的多孔碳（PC）一直是高性能超级电容器面临的主要挑战。在此，我们通过活化聚苯胺@PC (PANI@PC) 复合材料开发了类线虫球状 N 掺杂多孔碳 (NNPC)，该复合材料是通过 PANI 在源自 Al-MOF (MOF,金属-有机框架）。^{所制备的 NNPC 材料具有高达 2360 m 2} g ^-1的巨大比表面积和 1.15 cm ³ g ^-1的孔体积，表现出优异的比电容（346 F g ^-1 at 1 A g ^–1^{) 和惊人的倍率性能，当工作电流密度从 1 膨胀到 100 A g –1}时，电容保持率为 78.3% 。^{此外，该电极材料还表现出非凡的循环稳定性，在 50 A g -1}的 100 000 次循环中电容损失极低，仅为 5.9% 。^{此外，这种基于 NNPC 的对称超级电容器可提供 23.7 W h kg –1}的卓越能量密度在 6 M KOH 中，工作电压为 0–1.4 V。这些出色的电化学性能归因于 NNPC 的类线虫形态、分级孔结构和增强的电导率，可实现快速的离子/电荷迁移和交换。这项工作提出了一种策略，通过将 MOF 衍生的 PC 和富氮聚合物相结合来开发用于超级电容器应用的创新电极材料。

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Controlling Morphologies and Structures of PANI@Carbon with Superior Rate Performance for Supercapacitors

The preparation of porous carbon (PC) with a unique morphology, appropriate pore size distribution, and heteroatom doping has been a major challenge for high-performance supercapacitors. Herein, we developed nematosphere-like N-doped porous carbon (NNPC) via the activation of a polyaniline@PC (PANI@PC) composite that was acquired through PANI in situ growth on the surface of PC derived from Al-MOF (MOF, metal–organic framework). The as-prepared NNPC material possesses a huge specific surface area of up to 2360 m² g^–1 as well as a pore volume of 1.15 cm³ g^–1, exhibiting an excellent specific capacitance (346 F g^–1 at 1 A g^–1) and amazing rate performance with 78.3% capacitance retention when the working current density swells from 1 to 100 A g^–1. In addition, the electrode material also displays an extraordinary cyclic stability with an extremely low capacitance loss of 5.9% over 100 000 cycles at 50 A g^–1. Furthermore, this NNPC-based symmetric supercapacitor delivers a superior energy density of 23.7 W h kg^–1 in 6 M KOH with a 0–1.4 V operating voltage. These outstanding electrochemical performances are attributed to the nematosphere-like morphology, hierarchical pore structure, and enhanced electrical conductivity of NNPC for fast ion/charge migration and exchange. This work proposes a strategy to develop innovative electrode materials by combining MOF-derived PC and N-rich polymer for supercapacitor applications.

更新日期：2022-03-22

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