Modification of graphite felt with Ga2O3 in vanadium redox flow battery

doi:10.11949/j.issn.0438-1157.20150318

›› 2015, Vol. 66 ›› Issue (S1): 277-281.DOI: 10.11949/j.issn.0438-1157.20150318

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Modification of graphite felt with Ga₂O₃in vanadium redox flow battery

LI Chenfei^1,2, WANG Shubo², XIE Xiaofeng², ZHANG Jianwen¹

1 Institute of Fluid Flow and Heat Transfer, Beijing University of Chemical Technology, Beijing 100029, China;
2 Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China

Received:2015-03-12 Revised:2015-03-22 Online:2015-06-30 Published:2015-06-30
Supported by:
supported by the National High Technology Research and Development Program of China (2012AA052201) and the National Natural Science Foundation of China (21176140).

全钒液流电池石墨毡电极的Ga₂O₃修饰

李晨飞^1,2, 王树博², 谢晓峰², 张建文¹

1 北京化工大学流体力学与传热研究室, 北京 100029;
2 清华大学核能与新能源技术研究院, 北京 100084

通讯作者: 谢晓峰, 张建文
基金资助:
国家高技术研究发展计划项目(2012AA052201);国家自然科学基金项目(21176140)。

Abstract

Abstract: To improve the electrochemical activities of graphite felt (GF) electrodes of all vanadium flow battery (VRB), nano-Ga₂O₃ were deposited on the surface of graphite felt (GF) electrode in an VRB using thermal decomposition. Electrochemical performance and morphology of GF were studied by cyclic voltammetry (CV), polarization curves, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and charge-discharge test. The results showed that Ga₂O₃ has catalytic effects towards redox reaction of the electrode, when modifying the GF with Ga₂O₃, the anodic and cathodic reactivity of the VRB were increased by 13% and 18% compared with pristine one, while the battery exhibited higher capacity, current efficiency and energy efficiency.

Key words: all vanadium flow battery, graphite felt, surface, Ga₂O₃, catalysis, reaction

摘要： 为提高全钒液流电池石墨毡电极的电化学性能, 采用热分解法将纳米Ga₂O₃沉积在全钒液流电池石墨毡电极表面。通过循环伏安测试、动电位极化曲线测试、扫描电镜测试(SEM)、X射线光电子能谱分析(XPS)和充放电实验考察了Ga₂O₃对石墨毡电化学性能和表面形貌的影响。研究结果表明:Ga₂O₃对电极反应具有显著的催化作用, 当用Ga₂O₃电极修饰石墨毡时, 电池正负极反应活性较未处理前分别提高13%和18%, 同时也导致全钒液流电池的容量更大, 电流效率和能量效率更高。

关键词: 全钒液流电池, 石墨毡, 表面, Ga₂O₃, 催化, 反应

CLC Number:

TQ152

LI Chenfei, WANG Shubo, XIE Xiaofeng, ZHANG Jianwen. Modification of graphite felt with Ga₂O₃in vanadium redox flow battery[J]. , 2015, 66(S1): 277-281.

李晨飞, 王树博, 谢晓峰, 张建文. 全钒液流电池石墨毡电极的Ga₂O₃修饰[J]. CIESC Journal, 2015, 66(S1): 277-281.

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Modification of graphite felt with Ga₂O₃in vanadium redox flow battery

全钒液流电池石墨毡电极的Ga₂O₃修饰

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