METHOD FOR SURFACE MODIFYING FELT ELECTRODE FOR REDOX FLOW BATTERY

A surface modification method for a graphite felt electrode for a vanadium redox flow battery is provided. The surface modification method includes the steps of: i) forming an oxygen functional group on at least one surface of the graphite felt electrode before modifying the surface of the graphite...

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Bibliographische Detailangaben
Hauptverfasser:	KWON SOONHYUNG, KIM SEONGJIN, BAEK JAEYEOL, JIN HWAYOUNG, CHOI YOOJEONG
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	A surface modification method for a graphite felt electrode for a vanadium redox flow battery is provided. The surface modification method includes the steps of: i) forming an oxygen functional group on at least one surface of the graphite felt electrode before modifying the surface of the graphite felt electrode; and ii) heat treating at least one surface of the graphite felt electrode on which the oxygen functional group is formed at a temperature of 800 to 900 deg. C for 30 to 60 minutes in an ammonia gas atmosphere to form a nitrogen functional group. In the step of forming an oxygen functional group, the oxygen functional group is a carboxyl group (-COOH), a carbonyl group (C=O), or a hydroxyl group (-OH). 바나듐 레독스 흐름전지용 그라파이트 펠트전극의 표면 개질방법을 제공한다. 표면 개질방법은 i) 그라파이트 펠트전극 표면의 개질처리 전 그라파이트 펠트전극의 적어도 일면에 산소 작용기를 형성하는 단계, 및 ii) 산소 작용기가 형성된 그라파이트 펠트전극의 적어도 일면에 암모니아 가스 분위기 하에서 800℃ 내지 900℃의 온도로 30분 내지 60분 동안 열처리하여 질소 작용기를 형성하는 단계를 포함한다. 산소 작용기를 형성하는 단계에서, 산소 작용기는 카복실기(-COOH), 카보닐기(C=O) 또는 하이드록실기(-OH)이다.