Fungal exopolysaccharides as a bio-binder for conductive pigment/reduced graphene oxide/nano‑cobalt composite: an eco-friendly solution for anode rechargeable batteries

IF 4.5 2区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

Bioelectrochemistry Pub Date : 2025-09-04 DOI:10.1016/j.bioelechem.2025.109094

Nashwa.M. Yousif , Reham M.M. AbdelKader , Ola.M. Gomaa

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引用次数: 0

Abstract

The rapid increase in population has driven the demand for fossil fuel energy, contributing to increased carbon emissions that ultimately accelerate global warming and climate change. Battery storage systems have many advantages over conventional energy sources. However, they face limitations such as energy storage, cost, and environmental hazards that come with the use of chemical binders. This study presents a novel application of Talaromyces atroroseus co-produced exopolysaccharides (EPS)-pigment complex for their bio-binding and conductivity properties that can replace chemical binders in the preparation of rechargeable anode batteries. The EPS–pigment complex was combined with reduced graphene oxide (rGO) and nano‑cobalt (CoNPs) to fabricate a hybrid conductive composite on nickel foam mesh. The composite was characterized using Energy Dispersive X-ray (EDX) and X-ray diffraction (XRD), both confirmed the presence of C, O, and Co. Electrochemical characterization of the composite elements showed a cathodic peak at 0.2 V and an anodic peak at 0.414 V. At the same time, the specific capacitance reached 400 F/g for the composite. The results also demonstrated a good rate of charge and discharge. Compared to chemical binders, fungal EPS showed good binding strength and environmental benefits due to its bio-based nature.

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真菌胞外多糖作为导电颜料/还原氧化石墨烯/纳米钴复合材料的生物粘合剂：阳极可充电电池的环保解决方案

人口的快速增长推动了对化石燃料能源的需求，导致碳排放增加，最终加速了全球变暖和气候变化。与传统能源相比，电池存储系统有许多优点。然而，它们面临着使用化学粘合剂所带来的能量储存、成本和环境危害等限制。本研究提出了一种新的应用Talaromyces atroseus共同生产的胞外多糖(EPS)-色素复合物的生物结合和导电性，可以取代化学粘合剂在制备可充电阳极电池中的应用。将eps -颜料复合物与还原氧化石墨烯（rGO）和纳米钴（CoNPs）结合，在泡沫镍网上制备了一种混合导电复合材料。利用能量色散x射线（EDX）和x射线衍射（XRD）对复合材料进行了表征，均证实了C、O和Co的存在。复合元素的电化学表征表明，复合元素在0.2 V处有阴极峰，在0.414 V处有阳极峰。同时，复合材料的比电容达到400f /g。结果还表明了良好的充放电速率。与化学粘合剂相比，真菌EPS具有良好的结合强度和环境效益。

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来源期刊

Bioelectrochemistry 生物-电化学

CiteScore

9.10

自引率

6.00%

发文量

238

审稿时长

38 days

期刊介绍： An International Journal Devoted to Electrochemical Aspects of Biology and Biological Aspects of Electrochemistry Bioelectrochemistry is an international journal devoted to electrochemical principles in biology and biological aspects of electrochemistry. It publishes experimental and theoretical papers dealing with the electrochemical aspects of: • Electrified interfaces (electric double layers, adsorption, electron transfer, protein electrochemistry, basic principles of biosensors, biosensor interfaces and bio-nanosensor design and construction. • Electric and magnetic field effects (field-dependent processes, field interactions with molecules, intramolecular field effects, sensory systems for electric and magnetic fields, molecular and cellular mechanisms) • Bioenergetics and signal transduction (energy conversion, photosynthetic and visual membranes) • Biomembranes and model membranes (thermodynamics and mechanics, membrane transport, electroporation, fusion and insertion) • Electrochemical applications in medicine and biotechnology (drug delivery and gene transfer to cells and tissues, iontophoresis, skin electroporation, injury and repair). • Organization and use of arrays in-vitro and in-vivo, including as part of feedback control. • Electrochemical interrogation of biofilms as generated by microorganisms and tissue reaction associated with medical implants.