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[1]肖钦豪,汪雷,景文珩.NiO改性石墨毡的钒电池正极材料性能表征[J].南京工业大学学报(自然科学版),2020,42(05):571-579.[doi:10.3969/j.issn.1671-7627.2020.05.004]
 XIAO Qinhao,WANG Lei,JING Wenheng.Performance characterization of NiO-modified graphite felt as positive electrode for vanadium redox flow battery[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2020,42(05):571-579.[doi:10.3969/j.issn.1671-7627.2020.05.004]
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NiO改性石墨毡的钒电池正极材料性能表征()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
42
期数:
2020年05期
页码:
571-579
栏目:
出版日期:
2020-09-20

文章信息/Info

Title:
Performance characterization of NiO-modified graphite felt as positive electrode for vanadium redox flow battery
文章编号:
1671-7627(2020)05-0571-09
作者:
肖钦豪汪雷景文珩
南京工业大学 化工学院 材料化学工程国家重点实验室,江苏 南京 211800
Author(s):
XIAO Qinhao WANG Lei JING Wenheng
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 211800, China
关键词:
钒电池 石墨毡 氧化镍 VO2+/VO+2
Keywords:
vanadium redox flow battery(VRFB) graphite felt nickle oxide VO2+/VO+2
分类号:
O646.54
DOI:
10.3969/j.issn.1671-7627.2020.05.004
文献标志码:
A
摘要:
为了提高石墨毡(GF)上VO2+/VO+2氧化还原电对的电催化活性,通过水热合成法制备全钒氧化还原液流电池(钒电池)正极材料——NiO改性石墨毡(NiO/GF)。通过扫描电子显微镜(SEM)、X线光谱仪、X线衍射仪(XRD)对样品进行表征。采用循环伏安(CV)测试和交流阻抗谱(EIS)表征样品的电性能。结果表明:NiO纳米片状颗粒均匀地附着在石墨毡表面,尺寸均匀,没有发生团聚; NiO/GF对VO2+/VO+2氧化还原反应的电化学活性、动力学可逆性以及电极表面的传质速率较GF都有显著的提高; NiO/GF的欧姆阻抗和电荷转移阻抗较GF都有显著的减小。在单电池测试中,不同电流密度下NiO/GF的电压效率(VE)和能量效率(EE)较GF都有显著的提高。在100次充放电循环过程中,相对于GF,NiO/GF的电压效率和能量效率都提高了约5.7%,并且NiO/GF的催化性能表现出良好的稳定性。
Abstract:
To improve electrocatalytic activity of graphite felt(GF)towards the VO2+/VO+2 redox couple, graphite felt modified by NiO(NiO/GF)as positive electrode of vanadium redox flow battery(VRFB)was prepared by hydrothermal method. The samples were characterized by scanning electron microscope(SEM), X-ray spectrometer, and X-ray diffractometer(XRD). The electrical properties of the samples were characterized by cyclic voltammetry(CV)test and electrochemical impedance spectroscopy(EIS). Results showed that NiO nano flake particles were uniformly attached to the surface of graphite felt, with uniform size and no agglomeration. The electrochemical activity, kinetic reversibility and mass transfer rate of NiO/GF towards the VO2+/VO+2 redox reaction were significantly improved as compared with GF. The ohmic impedance and charge transfer impedance of NiO/GF were significantly reduced as compared with GF. In the single cell test, the voltage efficiency(VE)and energy efficiency(EE)of NiO/GF at different current densities were significantly improved as compared with GF. During the 100 charge-discharge cycles, both VE and EE of NiO/GF were increased by about 5.7% relative to GF, and the catalytic performance of NiO/GF showed good stability.

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备注/Memo

备注/Memo:
收稿日期:2019-05-21
基金项目:国家自然科学基金(21676139)
作者简介:肖钦豪(1992—),男,E-mail:1098249314@qq.com; 景文珩(联系人),研究员,E-mail:jingwh@njtech.edu.cn.
引用格式:肖钦豪,汪雷,景文珩.NiO改性石墨毡的钒电池正极材料性能表征[J].南京工业大学学报(自然科学版),2020,42(5):571-579.
XIAO Qinhao, WANG Lei, JING Wenheng. Performance characterization of NiO-modified graphite felt as positive electrode for vanadium redox flow battery[J].Journal of Nanjing Tech University(Natural Science Edition),2020,42(5):571-579..
更新日期/Last Update: 2020-09-24