Study on Organic Redox Flow Battery Mechanism using TEMPO and FMN-Na Solutions

Reaktor Pub Date : 2019-09-30 DOI:10.14710/REAKTOR.19.3.96-100

Faishal Maulana Kusumah, Dita Baeti Pridiana, Peter Kusnadi, D. Ariyanti

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Abstract

Among numerous energy storage technologies, redox flow battery is one of the promising technologies that can be used to supply reliable continuation of electricity to electricity grids with a scale up to MW or MWh. In this paper, the process mechanism and optimization of redox flow battery using organic solution such as Riboflavin-5’-phosphate sodium salt dihydrate (FMN-Na) as anolyte and 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) as catholyte were investigated. Sodium and chloride ions in salt feed were moved respectively to anolyte and catholyte by electrochemical reaction of electrolytes during the charge process and return to the feed during the discharge process. The study was carried out by given electric current with different voltage to graphite electrode range 1,5-10,5 volts and TEMPO concentration 0,02-0,08 M. The result shows that the optimum voltage is 7,5 volts with the concentration of TEMPO 0,06 M. The result also confirms the role of TEMPO solutions in the cathode. In addition to that, the FTIR and SEM analysis to the sedimentation generated during the process also revealed the change of the anolyte and catholyte after charging process.Keywords: Organic; Flow Battery; TEMPO; FMN-Na; energy storage

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TEMPO和FMN-Na溶液对有机氧化还原液流电池机理的研究

在众多储能技术中，氧化还原液流电池是一种很有前途的技术，可用于向电网提供可靠的持续电力，规模可达兆瓦或兆瓦时。本文以核黄素-5′-磷酸钠二水合物(FMN-Na)为阳极液，4-羟基-2,2,6,6-四甲基胡椒碱-1-氧(TEMPO)为阴极液，研究了氧化还原液流电池的工艺机理及优化。盐料中的钠离子和氯离子在充电过程中通过电解质的电化学反应分别移动到阳极液和阴极液中，在放电过程中返回到进料中。在给定电压范围为1,5-10,5伏、TEMPO浓度为0,02-0,08 m的石墨电极上进行了实验研究，结果表明，在TEMPO浓度为0,06 m时，最佳电压为7,5伏，结果也证实了TEMPO溶液在阴极中的作用。此外，通过FTIR和SEM对过程中产生的沉淀进行分析，也揭示了充电过程中阳极液和阴极液的变化。关键词:有机;流电池;节奏;FMN-Na;能量储存

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Reaktor

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2 weeks