A novel catalyst of titanium boride toward V3+/V2+ redox reaction for vanadium redox flow battery

被引：25
作者：
Xue, Jing [1 ]
Jiang, Yingqiao [1 ]
Zhang, Zixuan [1 ]
Zhang, Tongxue [1 ]
Han, Chao [1 ]
Liu, Yongguang [1 ]
Chen, Zhongsheng [2 ]
Xie, Zongbo [2 ]
Le Zhanggao [2 ]
Dai, Lei [1 ,3 ]
Wang, Ling [1 ,3 ]
He, Zhangxing [1 ,3 ]
机构：
[1] North China Univ Sci & Technol, Sch Chem Engn, Tangshan 063009, Peoples R China
[2] East China Univ Technol, Jiangxi Prov Key Lab Synthet Chem, Nanchang 330013, Jiangxi, Peoples R China
[3] North China Univ Sci & Technol, Hebei Prov Key Lab Photocatalyt & Electrocatalyt, Tangshan 063009, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2021年 / 875卷
关键词：
Titanium boride; Electrocatalyst; Vanadium redox flow battery; Negative catalyst; Energy storage; POSITIVE ELECTRODE; GRAPHITE FELT; CARBON FELT; PERFORMANCE; DIBORIDE; COATINGS;
D O I：
10.1016/j.jallcom.2021.159915
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Transition metal borides have broad application prospects in the field of electrochemistry due to their excellent physicochemical stability and electrical conductivity. In this study, metal boride (titanium boride, TiB2) was first proposed as a novel catalyst for V3+/V2+ in vanadium redox flow battery. Nano-TiB2 exhibits large specific surface area and great electrical conductivity, and shows excellent catalytic performance in V3+/V2+ redox reaction. The performance of TiB2 as negative catalyst for cell was further investigated. Compared with pristine cell, TiB2 modified cell displays much higher discharge capacity (16.9 mA h) after 50 cycles and the incipient energy efficiency increases by 6.5%. The cell with TiB2 as the negative electrode catalyst exhibits excellent rate performance at 50-150 mA cm(-2). Voltage efficiency and energy efficiency of modified cell are 8.7% and 7.5% higher than those of pristine cell at 150 mA cm(-2), respectively. In conclusion, this work reveals that nano-TiB2 is a promising catalyst for enhancing the electrochemical performance toward V3+/V2+ redox reaction for vanadium redox flow battery. (C) 2021 Elsevier B.V. All rights reserved.
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页数：10
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