Electrospun N-Doped Porous Carbon Nanofibers Incorporated with NiO Nanoparticles as Free-Standing Film Electrodes for High-Performance Supercapacitors and CO2 Capture

Qi Li, Jiangna Guo, Dan Xu, Jianqiang Guo, Xu Ou, Yin Hu, Haojun Qi, and Feng Yan^*（严锋）

Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application，Department of Polymer Science and Engineering，College of Chemistry Chemical Engineering and Materials Science，Soochow University，Suzhou 215123, China

Small 2018, 14, 1704203

Carbon nanofibers (CNF) with a 1D porous structure offer promising support to encapsulate transition‐metal oxides in energy storage/conversion relying on their high specific surface area and pore volume. Here, the preparation of NiO nanoparticle‐dispersed electrospun N‐doped porous CNF (NiO/PCNF) and as free‐standing film electrode for high‐performance electrochemical supercapacitors is reported. Polyacrylonitrile and nickel acetylacetone are selected as precursors of CNF and Ni sources, respectively. Dicyandiamide not only improves the specific surface area and pore volume, but also increases the N‐doping level of PCNF. Benefiting from the synergistic effect between NiO nanoparticles (NPs) and PCNF, the prepared free‐standing NiO/PCNF electrodes show a high specific capacitance of 850 F g⁻¹at a current density of 1 A g⁻¹in 6mKOH aqueous solution, good rate capability, as well as excellent long‐term cycling stability. Moreover, NiO NPs dispersed in PCNF and large specific surface area provide many electroactive sites, leading to high CO₂uptake, and high‐efficiency CO₂electroreduction. The synthesis strategy in this study provides a new insight into the design and fabrication of promising multifunctional materials for high‐performance supercapacitors and CO₂electroreduction.

链接：https://onlinelibrary.wiley.com/doi/abs/10.1002/smll.201704203