无机材料学报Issue(7)：779-784,6.DOI:10.15541/jim20140656
全钒液流电池用碳纸电极掺氮改性的研究
Nitrogen-doped Carbon Paper as Electrodes for Vanadium Redox Flow Batteries
摘要
Abstract
To improve the electrochemical activity of carbon paper (CP) for vanadium redox flow batteries, CP was modified by heat treatment in atmosphere of NH3 at 600 (NCP-600) and 900℃ (NCP-900), respectively. The FTIR results indicate that the nitrogenous groups have been introduced on the surface of CP by modification successfully. Compared with the pristine sample, the water contact angle of NCP-900 decreases from 120.5° to 99.7°, indicating the improved hydrophilicity of CP by nitrogen doping. The SEM results show that there is no obvious morphology change on the surface of CP after nitrogen doping, which do not affect the mechanical property. The electrochemical activity of CP is enhanced significantly by nitrogen doping. The oxidation current peak of V(Ⅳ)/V(Ⅴ) couple on NCP-900 is 92.1 mA, much higher than that of pristine sample (68.9 mA). The cells with NCP-900 and pristine sample as electrodes were assembled and the charge-discharge performance was evaluated. The energy efficiency of cell with NCP-900 as electrode at a current density of 20 mA/cm2 is 83.73%, 2.59% larger than that with the pristine sample. The improved electrochemical performance of nitrogen-doped carbon paper is due to the increased active sites and the enhanced hydrophilicity provided by the introduced nitrogenous groups.关键词
全钒液流电池/掺氮/碳纸/动力学Key words
vanadium redox flow batteries/nitrogen doping/carbon paper/kinetics分类
化学化工引用本文复制引用
何章兴,刘剑蕾,何震,刘素琴..全钒液流电池用碳纸电极掺氮改性的研究[J].无机材料学报,2015,(7):779-784,6.基金项目
National Natural Science Foundation of China (51072234) （51072234）
National Key Basic Research Program of China (2010CB227201) （2010CB227201）
