物理化学学报2017，Vol.33Issue(12)：2510-2516,7.DOI:10.3866/PKU.WHXB201705311
基于三维花状五氧化二铌及活性炭的锂离子混合电容器
Lithium lon Hybrid Supercapacitor Based on Three-Dimensional Flower-Like Nb2O5 and Activated Carbon Electrode Materials
摘要
Abstract
A lithium ion hybrid supercapacitor system with battery and supercapacitor characteristics has the potential to meet the increasing demand for an energy storage device with both high energy and power densities. In this work, orthorhombic Nb2O5 (T-Nb2O5) with three-dimensional (3D) flower-like structures was synthesized by a facile hydrothermal reaction and an annealing process. A lithium ion hybrid supercapacitor was constructed by using T-Nb2O5 as an anode and commercial activated carbon (AC) as a cathode. The electrochemical performance of these T-Nb2O5/AC hybrid capacitors was measured by cyclic voltammetry and galvanostatic charge/discharge tests. The results showed that the working voltage of the hybrid supercapacitor could reach 3.0 V in the organic carbonate electrolyte system. The as-assembled device showed impressive power density of 294 W·kg?1and energy density of 53.79 W·h·kg?1 at a current density of 100 mA·g?1 with a voltage range of 0.5–3.5 V. Moreover, it also showed excelent cycling stability with a retention of 73％ after 1000 cycles at 200 mA·g?1. These results demonstrate that this novel lithium ion hybrid supercapacitor based onT-Nb2O5 with 3D flower-like structures and AC is a promising candidate for high power density energy storage applications.关键词
锂离子混合电容器/三维花状结构/正交相五氧化二铌/有机电解液/活性炭Key words
Lithium ion hybrid supercapacitor/Three-dimensional flower-like structure/Orthorhombic Nb2O5/Organic electrolyte/Activate carbon分类
化学化工引用本文复制引用
贾朝阳,刘美男,赵新洛,王贤树,潘争辉,张跃钢..基于三维花状五氧化二铌及活性炭的锂离子混合电容器[J].物理化学学报,2017,33(12):2510-2516,7.基金项目
The project was supported by the National Natural Science Foundation of China (51402345).国家自然科学基金(51402345)资助项目 （51402345）
