Doping Engineering of M-N-C Electrocatalyst Based Membrane-Electrode Assembly for High-Performance Aqueous Polysulfides Redox Flow Batteries

Overview

Journal Adv Sci (Weinh)

Specialty Biomedical Engineering

Date 2023 Apr 17

PMID 37066747

Authors

BiXian Chen

Huan Huang

Jiande Lin

Kailing Zhu

Le Yang

Xiang Wang

Jiajia Chen

Affiliations

Soon will be listed here.

Abstract

Polysulfides aqueous redox flow batteries (PS-ARFBs) with large theoretical capacity and low cost are one of the most promising solutions for large-scale energy storage technology. However, sluggish electrochemical redox kinetics and nonnegligible crossover of aqueous polysulfides restrict the battery performances. Herein, it is found that the Co, Zn dual-doped N-C complex have enhanced electrochemical adsorption behaviors for Na S . It exhibits significantly electrochemical redox activity compared to the bare glassy carbon electrode. And the redox reversibility is also improved from ΔV = 210 mV on Zn-doped N-C complex to ΔV = 164 mV on Co, Zn-doped N-C complex. Furthermore, membrane-electrode assembly (MEA) based on Co, Zn-doped N-C complex is firstly proposed to enhance the redox performances and relieve the crossover in PS-ARFBs. Thus, an impressively high and reversible capacity of 157.5 Ah L for Na S with a high capacity utilization of 97.9% could be achieved. Moreover, a full cell PS-ARFB with Na S anolyte and Na [Fe(CN) ] catholyte exhibits high energy efficiency ≈88.4% at 10 mA cm . A very low capacity decay rate of 0.0025% per cycle is also achieved at 60 mA cm over 200 cycles.

Citing Articles

Doping Engineering of M-N-C Electrocatalyst Based Membrane-Electrode Assembly for High-Performance Aqueous Polysulfides Redox Flow Batteries.

Chen B, Huang H, Lin J, Zhu K, Yang L, Wang X Adv Sci (Weinh). 2023; 10(16):e2206949.

PMID: 37066747 PMC: 10238193. DOI: 10.1002/advs.202206949.

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