通过插层聚合制备用于超级电容器的简洁氮掺杂碳纳米片/氮化钒纳米颗粒材料

Concise N-doped Carbon Nanosheets/Vanadium Nitride Nanoparticles Materials via Intercalative Polymerization for Supercapacitors.

作者信息

Tan Yongtao, Liu Ying, Tang Zhenghua, Wang Zhe, Kong Lingbin, Kang Long, Liu Zhen, Ran Fen

机构信息

State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, P. R. China.

School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, Gansu, P. R. China.

出版信息

Sci Rep. 2018 Feb 13;8(1):2915. doi: 10.1038/s41598-018-21082-w.

DOI:10.1038/s41598-018-21082-w

PMID:29440660

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5811484/

Abstract

N-doped carbon nanosheets/vanadium nitride nanoparticles (N-CNS/VNNPs) are synthesized via a novel method combining surface-initiated in-situ intercalative polymerization and thermal-treatment process in NH/N atmosphere. The pH value of the synthesis system plays a critical role in constructing the structure and enhancing electrochemical performance for N-CNS/VNNPs, which are characterized by SEM, TEM, XRD, and XPS, and measured by electrochemical station, respectively. The results show that N-CNS/VNNPs materials consist of 2D N-doped carbon nanosheets and 0D VN nanoparticles. With the pH value decreasing from 2 to 0, the sizes of both carbon nanosheets and VN nanoparticles decreased to smaller in nanoscale. The maximum specific capacitance of 280 F g at the current density of 1 A g for N-CNS/VNNPs is achieved in three-electrode configuration. The asymmetric energy device of Ni(OH)||N-CNS/VNNPs offers a specific capacitance of 89.6 F g and retention of 60% at 2.7 A g after 5000 cycles. The maximum energy density of Ni(OH) ||N-CNS/VNNPs asymmetric energy device is as high as 29.5 Wh kg.

摘要

通过一种将表面引发的原位插层聚合与在NH/N气氛中的热处理过程相结合的新方法合成了氮掺杂碳纳米片/氮化钒纳米颗粒（N-CNS/VNNPs）。合成体系的pH值在构建N-CNS/VNNPs的结构和增强其电化学性能方面起着关键作用，分别通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）和X射线光电子能谱（XPS）对其进行表征，并用电化学工作站进行测量。结果表明，N-CNS/VNNPs材料由二维氮掺杂碳纳米片和零维VN纳米颗粒组成。随着pH值从2降至0，碳纳米片和VN纳米颗粒的尺寸均减小至纳米级更小尺寸。在三电极配置中，N-CNS/VNNPs在1 A g的电流密度下实现了280 F g的最大比电容。Ni(OH)||N-CNS/VNNPs的非对称能量装置在5000次循环后，在2.7 A g下提供了89.6 F g的比电容和60%的保持率。Ni(OH)||N-CNS/VNNPs非对称能量装置的最大能量密度高达29.5 Wh kg。