材料科学
储能
纳米纤维
聚丙烯腈
导电体
碳化
化学工程
聚苯胺
阴极
碳纳米纤维
电化学
纳米技术
碳纳米管
超级电容器
阳极
电极
复合材料
功率(物理)
电气工程
聚合物
物理化学
工程类
化学
物理
量子力学
聚合
扫描电子显微镜
作者
Mingzhuang Liu,Xinghua Li,Chongyun Shao,Chaohan Han,Yu Liu,Xiaowei Li,Xiaoge Ma,Feiyu Chen,Yichun Liu
标识
DOI:10.1016/j.ensm.2021.10.025
摘要
Flexible carbon nanofibers networks (FCNNs) play a crucial role in flexible and portable energy storage devices. Doping conductive and reactive N-atoms can enhance charge transport and transfer properties vital for high energy storage and high power. However, synchronous-ultrahigh conductive-reactive N-atoms doped FCNNs (SH-FCNNs) are still challenged by the N-atoms instability at high temperatures. To resolve this problem, an in-situ synergistic-carbonization-nitridation strategy is reported using polyaniline (PANI) implanted highly porous polyacrylonitrile nanofibers as a precursor. The obtained SH-FCNNs were doped with 5.9 at% conductive and 4.73 at% reactive N-atoms. They exhibit a superhigh specific capacitance (580.9 F g−1@0.5 A g−1) and high-rate capability (307.2 F g−1@128 A g−1). The flexible solid-state supercapacitors can output specific energy and power density of 18.3 Wh kg−1 and 16.9 kW kg−1. As for flexible solid-state Zn-ion batteries, the constructed [email protected] cathodes have specific energy (290 Wh kg−1@0.159 kW kg−1) and supercapacitor-like power performance (128.1 Wh kg−1@23.3 kW kg−1). The synergistic effects of ultrahigh conductive and reactive N-atoms promote these performances to reach the mountaintop of flexible solid-state energy storage devices. The novel strategy also presents new insights on designing high-performance FCNNs for electrochemical energy storage, catalysts, and sensors.
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