Fabrication and characterization of free-standing α-MnO2/AC composite electrodes for Na-Ion batteries

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Letters Pub Date : 2025-02-17 DOI:10.1016/j.matlet.2025.138253

Ali Ahmed Aldarmaki, Amarsingh Bhabu Kanagaraj, Daniel S. Choi

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Abstract

The rapid growth of the date palm industry in the United Arab Emirates (UAE) results in significant biomass waste, particularly from leaflets and fronds. This study presents a sustainable approach to repurposing date palm biomass by synthesizing activated carbon (AC) from waste date palm leaves and integrating it with alpha-phase manganese dioxide (α-MnO₂) to fabricate a composite anode material for sodium-ion batteries (NIBs). A flexible, free-standing α-MnO₂/AC composite electrode was fabricated after a two-step hydrothermal method. Scanning electron microscope (SEM) analysis reveals the formation of nanostructured α-MnO₂ embedded within the porous AC matrix. Electrochemical testing reveals that the composite anode exhibits a discharge capacity of 466 mAh/g at a current density of 50 mA/g, with remarkable cycling stability and a consistent coulombic efficiency of 100 %. This work demonstrates a sustainable use of biomass waste for energy storage applications, providing an eco-friendly solution for high-capacity, long-cycle NIBs.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive