Interface-engineered CuBi2O4/biomass-derived activated carbon composites for supercapacitors

IF 7 2区生物学 Q1 AGRICULTURAL ENGINEERING

Biomass & Bioenergy Pub Date : 2026-08-01 Epub Date: 2026-03-07 DOI:10.1016/j.biombioe.2026.109223

J. Venkatesan , J. Preethi Rency Fathima , J. Bosco Franklin , A. Padmanaban , A. Kumaresan , S. John Sundaram , P. Maadeswaran , Kasinathan Kaviyarasu

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引用次数: 0

Abstract

In the present study, a co-precipitation method was used to synthesize CuBi₂O₄ nanoflakes (NFs), and a CuBi₂O₄/biomass-derived activated carbon (AC) composite was prepared via sonication and investigated as a promising supercapacitor electrode material. Despite the intrinsic redox activity of CuBi₂O₄, its practical application is limited by low electrical conductivity and restricted surface area. To address these challenges, a porous AC matrix was introduced to enhance the electrochemical performance. Electrochemical measurements, including cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD), revealed that the CuBi₂O₄/AC composite exhibited a significantly enhanced specific capacitance of 228 F gg⁻¹ at 5 mV s⁻¹ and 170 F g⁻¹ at 1 A g⁻¹, compared to 131 F g⁻¹ and 105 F g⁻¹ for pristine CuBi₂O₄. Electrochemical impedance spectroscopy (EIS) analysis indicated a lower charge-transfer resistance. These findings suggest that the CuBi₂O₄/AC composite is a promising candidate for sustainable supercapacitor electrode applications with improved electrochemical performance.

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超级电容器用CuBi2O4/生物质活性炭复合材料界面工程研究

本研究采用共沉淀法合成CuBi2O4纳米片（NFs），并通过超声法制备CuBi2O4/生物质活性炭（AC）复合材料，研究其作为超级电容器电极材料的前景。尽管CuBi2O4具有固有的氧化还原活性，但其实际应用受到低电导率和有限表面积的限制。为了解决这些问题，研究人员引入了多孔交流基质来提高电化学性能。电化学测量（包括循环伏安法（CV）和恒流充放电法（GCD））表明，CuBi2O4/AC复合材料在5 mV s−1下的比电容为228 F g−1，在1 a g−1下的比电容为170 F g−1，而原始CuBi2O4的比电容为131 F g−1和105 F g−1。电化学阻抗谱（EIS）分析表明其电荷转移电阻较低。这些发现表明，CuBi2O4/AC复合材料是一种具有改善电化学性能的可持续超级电容器电极应用的有希望的候选者。

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来源期刊

Biomass & Bioenergy 工程技术-能源与燃料

CiteScore

11.50

自引率

3.30%

发文量

258

审稿时长

60 days

期刊介绍： Biomass & Bioenergy is an international journal publishing original research papers and short communications, review articles and case studies on biological resources, chemical and biological processes, and biomass products for new renewable sources of energy and materials. The scope of the journal extends to the environmental, management and economic aspects of biomass and bioenergy. Key areas covered by the journal: • Biomass: sources, energy crop production processes, genetic improvements, composition. Please note that research on these biomass subjects must be linked directly to bioenergy generation. • Biological Residues: residues/rests from agricultural production, forestry and plantations (palm, sugar etc), processing industries, and municipal sources (MSW). Papers on the use of biomass residues through innovative processes/technological novelty and/or consideration of feedstock/system sustainability (or unsustainability) are welcomed. However waste treatment processes and pollution control or mitigation which are only tangentially related to bioenergy are not in the scope of the journal, as they are more suited to publications in the environmental arena. Papers that describe conventional waste streams (ie well described in existing literature) that do not empirically address ''new'' added value from the process are not suitable for submission to the journal. • Bioenergy Processes: fermentations, thermochemical conversions, liquid and gaseous fuels, and petrochemical substitutes • Bioenergy Utilization: direct combustion, gasification, electricity production, chemical processes, and by-product remediation • Biomass and the Environment: carbon cycle, the net energy efficiency of bioenergy systems, assessment of sustainability, and biodiversity issues.