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Copolymer derived micro/meso-porous carbon nanofibers with vacancy-type defects for high-performance supercapacitors
Journal of Materials Chemistry A ( IF 11.9 ) Pub Date : 2020/01/09 , DOI: 10.1039/c9ta08850d
Jiye Li 1, 2, 3, 4 , Weimiao Zhang 1, 2, 3, 4 , Xu Zhang 1, 2, 3, 4 , Liyao Huo 1, 2, 3, 4 , Jiayi Liang 1, 2, 3, 4 , Lisheng Wu 1, 2, 3, 4 , Yong Liu 5, 6, 7, 8 , Jiefeng Gao 1, 2, 3, 4 , Huan Pang 1, 2, 3, 4 , Huaiguo Xue 1, 2, 3, 4
Affiliation  

Carbon nanofibers (CNFs) have been good candidates for electrode materials in supercapacitors (SPCs). It is desirable but still challenging to explore CNFs with both multiscale porous structures and high heteroatom doping. Herein, hierarchically porous CNFs (HPCNFs) are prepared with the use of poly(acrylonitrile-co-acrylic acid) (P(AN-co-AA)) and terephthalic acid (PTA). The degradation of the AA segments induces vacancy-type defects, which result in the formation of micropores inside the CNFs. In addition, the defects promote increased redox activity by increasing the N-P content. Moreover, PTA sublimation creates mesopores inside the HPCNFs, which can largely reduce ion transport resistance in the HPCNFs. The specific capacitance and area normalized capacitance (CA) of HPCNFs can reach as high as 327 F g−1 and 80.5 μF cm−2, respectively. Additionally, high capacitance retention and excellent cycling stability can be achieved. The HPCNFs with vacancy-type defects are promising for developing high-performance electrode materials for SPCs.

中文翻译:

具有空位型缺陷的共聚物衍生的微孔/中孔碳纳米纤维,用于高性能超级电容器

碳纳米纤维(CNF)已成为超级电容器(SPC)中电极材料的良好候选者。探索具有多尺度多孔结构和高杂原子掺杂的CNF是理想的,但仍然具有挑战性。在此,使用聚(丙烯腈--丙烯酸)(P(AN--AA))和对苯二甲酸(PTA)制备分级多孔CNF(HPCNF )。AA区段的降解引起空位型缺陷,其导致CNF内部的微孔的形成。另外,缺陷通过增加NP含量促进了氧化还原活性的增加。此外,PTA升华会在HPCNF内部产生中孔,这会大大降低HPCNF中的离子迁移阻力。比电容和面积归一化电容(CHPCNF的A)可以分别达到327 F g -1和80.5μFcm -2。另外,可以实现高电容保持率和出色的循环稳定性。具有空位型缺陷的HPCNF有望用于开发SPC的高性能电极材料。
更新日期:2020-02-10
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