Mitigating Capacity Decay by Adding Carbohydrate in the Negative Electrolyte of Vanadium Redox Flow Battery

Liming Chen; Tao Liu; Yimin Zhang; Hong Liu; Muqing Ding; Dong Pan

LAPSE:2023.14210

Published Article

LAPSE:2023.14210

Mitigating Capacity Decay by Adding Carbohydrate in the Negative Electrolyte of Vanadium Redox Flow Battery

Liming Chen, Tao Liu, Yimin Zhang, Hong Liu, Muqing Ding, Dong Pan

March 1, 2023

Abstract
Glucose, sucrose, D(+)-xylose and α-lactose monohydrate are selected as additives relative to the negative electrolyte of Vanadium Redox Flow Battery (VRFB), with the aim of reducing vanadium permeation and improving electrochemical performance to mitigate capacity decay. The results of a charge−discharge test show that the cell with α-Lactose monohydrate in the negative electrolyte exhibits the best capacity retention. The capacity retention of a single cell employing 1 wt% α-Lactose monohydrate in the negative electrolyte was 71% after 30 cycles, which is 41.5% higher than 29.5% of the control group. Correspondingly, adding α-Lactose monohydrate into the negative electrolyte also significantly inhibits vanadium crossover and water transfer. Furthermore, the effects of additives on the performance of the negative electrolyte are studied by thermal stability experiments, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The stability experiments indicate that the introduction of 1 wt% α-Lactose monohydrate can elevate the stability of the negative electrolyte at low temperatures. The electrochemical measurements indicate that V(III) electrolyte with 1 wt% α-Lactose monohydrate obtains superior electrochemical activity and reversibility, which can be ascribed to the fact that the hydroxyl group carried by the additive provides more active sites for the redox reaction. Herein, the study provides a meaningful reference for mitigating the capacity decay of VRFB.

Record ID

LAPSE:2023.14210

Keywords

additive, capacity decay/retention, stability, vanadium redox flow batteries

Subject

Energy Systems

Suggested Citation

Chen L, Liu T, Zhang Y, Liu H, Ding M, Pan D. Mitigating Capacity Decay by Adding Carbohydrate in the Negative Electrolyte of Vanadium Redox Flow Battery. (2023). LAPSE:2023.14210

Author Affiliations

Chen L: School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Scie
Liu T: School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Scie
Zhang Y: School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Scie
Liu H: School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Scie
Ding M: School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Scie [ORCID]
Pan D: School of Resource and Environmental Engineering, Wuhan University of Science and Technology, Wuhan 430081, China; State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Scie

Journal Name

Energies

Volume

15

Issue

7

First Page

2454

Year

2022

Publication Date

2022-03-27