High-performance composite electrode based on polyaniline/graphene oxide carbon network for vanadium redox flow batteries

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2024-09-22 DOI:10.1016/j.compstruct.2024.118606

Amanpreet Kaur , Gurpreet Singh , Jun Woo Lim

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引用次数: 0

Abstract

In this study, an electrode wrapped in a carbon network is fabricated using a straightforward hydrothermal technique. Conducting polymers such as polyaniline (PANi) have been used to form carbon networks on the surfaces of carbon fibers. However, the cycling instability of PANi, which is a consequence of structural modifications, is a significant obstacle to its commercial application. This study presents an innovative and effective approach for synthesizing carbon networks using PANi/reduced graphene oxide (PANi-rGO-CF) composites to enhance the performance of vanadium redox flow battery (VRFB) electrodes. PANi-rGO was deposited on carbon felt using a hydrothermal method, followed by calcination under an argon atmosphere. The presence of graphene oxide facilitated the uniform distribution of PANi and enhanced its stability. PANi-rGO-CF demonstrated superior electrocatalysis toward vanadium redox couples owing to the abundant heteroatom active sites, affording VRFBs with extraordinary stability and outstanding energy efficiency after 100 cycles at 100 mA/cm².

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基于聚苯胺/氧化石墨烯碳网络的高性能复合电极，用于钒氧化还原液流电池

本研究采用直接的水热技术制造了一个包裹在碳网络中的电极。聚苯胺（PANi）等导电聚合物已被用于在碳纤维表面形成碳网络。然而，PANi 因结构改性而导致的循环不稳定性是其商业应用的一大障碍。本研究提出了一种利用 PANi/还原氧化石墨烯（PANi-rGO-CF）复合材料合成碳网络的创新而有效的方法，以提高钒氧化还原液流电池（VRFB）电极的性能。采用水热法将 PANi-rGO 沉积在碳毡上，然后在氩气环境下进行煅烧。氧化石墨烯的存在促进了 PANi 的均匀分布并增强了其稳定性。由于具有丰富的杂原子活性位点，PANi-rGO-CF 对钒氧化还原偶具有卓越的电催化性能，在 100 mA/cm2 下循环 100 次后，VRFB 具有超强的稳定性和出色的能效。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.