基于烟草衍生碳燃料的直接碳燃料电池的 Gd0.2Ce0.8O1.9-SrFe1-xTixO3-δ 复合阴极

IF 2.6 4区 化学 Q3 ELECTROCHEMISTRY
Mubushar Majeed, Amjad Ali, Farhan Anwer, Bilal Mazhar, Ghulam Mustafa, Rizwan Raza, Chen Xia
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引用次数: 0

摘要

作为一种将燃料的化学能直接转化为电能的电化学装置,燃料电池是一种新的替代技术,它利用可再生资源燃料发电,促进可持续发展和能源安全。在各种类型的燃料电池中,直接碳燃料电池(DCFC)的效率较高,因为碳燃料的能量密度高于液体或气体燃料。然而,目前 DCFC 的发展仍受到阴极反应活性迟缓的限制。本研究开发了一种由 Gd0.2Ce0.8O1.9(GDC)和 SrFe1-xTixO3-δ (SFT)组成的新型复合阴极,用于基于烟草的碳燃料直流FC。系统地评估了这些材料的结构、光学和电化学特性。X 射线衍射分析结果表明,样品中的 GDC 为立方结构,SFT 为立方包晶相,晶粒大小分别为 37 纳米和 15 纳米。紫外-可见光谱显示出间接带隙,并出现红移。傅立叶变换红外光谱证实了所有样品中都存在 Ce-O、Sr-Ti-O 和 Fe-O 官能团。扫描电子显微镜分析显示了材料的形态和粒度。与使用烟草碳燃料的其他样品相比,Gd0.2Ce0.8O2-δ-SrFe0.96Ti0.04O1.9 样品在 600 °C 氧气环境中的导电率最高,达到 4.96 S cm-1,600 °C 时的功率密度也更高,达到 40 mW cm-2。这些发现表明,所开发的复合阴极是低温直流FCs 的高效阴极。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Composite cathode Gd0.2Ce0.8O1.9–SrFe1−xTixO3-δ for Nicotiana tabacum-derived carbon fuel-based direct carbon fuel cell

Composite cathode Gd0.2Ce0.8O1.9–SrFe1−xTixO3-δ for Nicotiana tabacum-derived carbon fuel-based direct carbon fuel cell

Composite cathode Gd0.2Ce0.8O1.9–SrFe1−xTixO3-δ for Nicotiana tabacum-derived carbon fuel-based direct carbon fuel cell

As an electrochemical device that converts the chemical energy of fuel directly into electrical energy, the fuel cell is a new alternative technology that uses fuel from renewable sources and generates power for sustainable development and energy security. Among various types of fuel cells, the direct carbon fuel cell (DCFC) has higher efficiency because carbon fuel has higher energy density than liquid or gas fuel. However, the current development of DCFCs is still limited by the sluggish activity of the cathode reaction. In this study, a new composite cathode made of Gd0.2Ce0.8O1.9 (GDC) and SrFe1−xTixO3–δ (SFT) is developed for a Nicotiana tabacum-derived carbon fuel-based DCFC. The structural, optical, and electrochemical properties of the materials are systematically evaluated. X-ray diffraction analysis results show a cubic structure of GDC and cubic perovskite phase of SFT in the sample, with crystallite sizes of 37 and 15 nm, respectively. Ultraviolet–visible spectroscopy reveals an indirect band gap which exhibits a red shift. Fourier transform infrared spectroscopy confirms the presence of Ce–O, Sr–Ti–O, and Fe–O functional groups in all the samples. Scanning electron microscopy analysis shows the morphology and particle size of the materials. The sample Gd0.2Ce0.8O2-δ–SrFe0.96Ti0.04O1.9 exhibits the highest electrical conductivity of 4.96 S cm−1 in an oxygen atmosphere at 600 °C and a higher power density of 40 mW cm−2 at 600 °C compared to other samples using Nicotiana tabacum carbon fuel. These findings indicate that the developed composite cathode is an efficient cathode for low-temperature DCFCs.

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来源期刊
CiteScore
4.80
自引率
4.00%
发文量
227
审稿时长
4.1 months
期刊介绍: The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.
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