In-situ electrodeposition of homogeneous and dense bismuth nanoparticles onto scale-up graphite felt anodes for vanadium redox flow batteries

Ren，Jiayou1; Wang，Zhenyu1; Sun，Jing1; Guo，Zixiao1; Liu，Bin1; Fan，Xinzhuang1; Zhao，Tianshou1,2

2023-12-01

10.1016/j.jpowsour.2023.233655

Journal of Power Sources   影响因子和分区

0378-7753

The uniform and dense distribution of highly active electrocatalysts onto graphite fibers of scale-up anodes is essential for the engineered vanadium redox flow batteries to be operated efficiently and stably. In this work, a new in-situ electrodeposition strategy of bismuth is devised by using a catholyte with a low concentration of vanadium ions (33 mM V). Compared with the conventional method using a catholyte with a high concentration of vanadium ions (1700 mM VO), the present strategy renders Bi nanoparticles not being oxidized by VO transported across the membrane from the catholyte, enabling bismuth nanoparticles with sizes of about 58 nm being uniformly and densely electrodeposited onto graphite fibers of an anode (117 cm) at an extremely low electrodeposition current density (2 mA cm). The vanadium redox flow battery with the present scale-up anode achieves an energy efficiency of 76.3% even at a current density of 300 mA cm, which is higher than that of batteries with a conventional method treated anode (74.9%), and an untreated (73.3%). Furthermore, the battery with the present scale-up anode shows an energy efficiency of 82.5% and stable operation for 200 cycles at a current density of 200 mA cm.

Bismuth catalysts In-situ electrodeposition Scale-up graphite anode Transmembrane transport Vanadium redox flow battery

SCI ; EI

英语

通讯

WOS:001093285400001

20234114850512

Anodes ; Bismuth ; Current density ; Electrocatalysts ; Electrodeposition ; Energy efficiency ; Flow batteries ; Graphite ; Vanadium

Energy Conservation:525.2 ; Electroplating:539.3.1 ; Vanadium and Alloys:543.6 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Secondary Batteries:702.1.2 ; Electron Tubes:714.1 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Solid State Physics:933

MATERIALS SCIENCE

2-s2.0-85173580439

Scopus

1.Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Kowloon,Clear Water Bay,Hong Kong
2.Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Ren，Jiayou,Wang，Zhenyu,Sun，Jing,et al. In-situ electrodeposition of homogeneous and dense bismuth nanoparticles onto scale-up graphite felt anodes for vanadium redox flow batteries[J]. Journal of Power Sources,2023,586.

Ren，Jiayou.,Wang，Zhenyu.,Sun，Jing.,Guo，Zixiao.,Liu，Bin.,...&Zhao，Tianshou.(2023).In-situ electrodeposition of homogeneous and dense bismuth nanoparticles onto scale-up graphite felt anodes for vanadium redox flow batteries.Journal of Power Sources,586.

Ren，Jiayou,et al."In-situ electrodeposition of homogeneous and dense bismuth nanoparticles onto scale-up graphite felt anodes for vanadium redox flow batteries".Journal of Power Sources 586(2023).