Regulating Zinc Nucleation via KOH-Etched and Cu-Coated Carbon Felt for Stable Zinc–Vanadium Redox Flow Batteries

IF 3.4 4区工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY

Korean Journal of Chemical Engineering Pub Date : 2026-04-25 DOI:10.1007/s11814-026-00722-2

Seongbin Kang, Jueun Kim, Eunjeong Song, Hyeyoung Shin, Mihee Park, Minjoon Park

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引用次数: 0

Abstract

To mitigate zinc dendrite growth at the negative electrode of zinc–vanadium redox flow batteries, a KOH-etched and Cu-coated carbon felt was employed and systematically compared with pristine carbon felt. The electrochemical properties of the modified electrode were evaluated using cyclic voltammetry and electrochemical impedance spectroscopy, revealing a reduced zinc nucleation overpotential, enhanced peak current, and decreased interfacial resistance. Furthermore, zinc symmetric cell and full-cell charge–discharge tests demonstrated significantly improved cycling stability and reduced overpotential. The full cell employing the modified electrode delivered an average Coulombic efficiency (CE) of 100% and an average energy efficiency (EE) of 87.292% over 100 cycles, confirming the effectiveness of the surface modification in suppressing zinc dendrite growth and enhancing overall battery performance.

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通过koh蚀刻和镀铜碳毡调节锌成核稳定的锌钒氧化还原液流电池

为了减缓锌钒氧化还原液流电池负极锌枝晶的生长，采用koh蚀刻镀铜碳毡，并与原始碳毡进行了系统比较。利用循环伏安法和电化学阻抗谱对修饰电极的电化学性能进行了评价，发现锌成核过电位降低，峰值电流增强，界面电阻降低。此外，锌对称电池和全电池充放电测试表明，循环稳定性显著提高，过电位降低。经过100次循环后，使用改性电极的全电池平均库仑效率（CE）为100%，平均能量效率（EE）为87.292%，证实了表面改性在抑制锌枝晶生长和提高电池整体性能方面的有效性。

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来源期刊

Korean Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

4.60

自引率

11.10%

发文量

310

审稿时长

4.7 months

期刊介绍： The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.