AAAFM Energy current issue cover EISSN: 2692-5060

AAAFM Energy

AAAFM-Energy is a multidisciplinary, peer-reviewed journal publishing high quality research in all forms of energy harvesting, conversion, storage, utilization, energy policies and their impacts on societies.

Journal Metrics
29 Days
From submission to first editorial decision
22 Days
From editorial acceptance to publication.
72 %
Acceptance rate
120 Days
Overall Publication Duration
Outstanding Reviewers

Articles

Open access Original Article | February 02, 2020
Rational Solution-assisted Synthesis of Copper Sulfide Nanoparticles for Ultrahigh-rate Electrochemical Energy Storage

Dr Imran Shakir, Dr Zeyad Ammar Almutairi

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The aim of this research work is to explore and compare electrochemical activity of the cupric sulfide (CuS) and cuprous sulfide (Cu2S) nanoparticles. For this purpose, CuS and Cu2S were synthesized by a facile chemical solution method. The morphology, structure, and surface area of the synthesized CuS and Cu2S nanoparticles were characterized by transmission electron microscope, X-ray diffraction, and Brunauer–Emmett–Teller analysis, respectively. The electrochemical activities of the prepared materials were studied by performing cyclic voltammetry and electrochemical impedance spectroscopy analysis in 1 M LiClO4 using a three-electrode system. It was observed that specific capacitance of the CuS (435 Fg−1) is higher than that of Cu2S (273 Fg−1) at the same current density (5 Ag−1). Furthermore, CuS retained 86% while Cu2S retained 75% of their initial capacitance after 6,000 charge–discharge cycles. Therefore, CuS owing to its higher electrochemical activity and cyclic stability is a superior electrode material than Cu2S for supercapacitor applications.

Open access Original Article | February 02, 2020
High Haze Ratio-Based ITO Films Prepared on Periodic Textured Glass Surfaces for Thin Film Solar Cells

Dr Junsin Yi, Dr Shahzada Qamar Hussain, Dr Muhammad Quddamah Khokhar, Dr Hyeongsik Park, Dr Aamir Razaq, Dr Ishrat Sultana, Dr Mukhtar Ahmad, Dr Eun-Chel Cho

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Light-trapping phenomenon is limited due to non-uniform surface structure of transparent conducting oxide (TCO) films. The proper control of surface structure with uniform cauliflower TCO films may be appropriate for efficient light trapping. We report a light-trapping scheme of SF6/Ar plasma-based textured glass surfaces for high root-mean-square (RMS) roughness and haze ratio of ITO films. It was observed that the variation in Ar flow ratio in SF6/Ar plasma during the inductive coupled plasma-reactive ion etching (ICP-RIE) process was an important factor to improve the haze ratio of textured glass. The SF6/Ar plasma textured glass showed low etching rates due to the presence of various metal elements, such as Al, B, F, and Na. The ITO films were deposited on SF6/Ar plasma-textured glass substrates showed the high RMS roughness (433 nm) and haze ratio (67.8%) in the visible wavelength region. The change in surface structure has a negligible influence on the electrical properties of ITO films. The TCO films deposited on periodic textured glass surfaces with high RMS roughness and haze ratio are proposed for high-efficiency amorphous silicon (a-Si) thin-film solar cells.

Open access Original Article | February 02, 2020
Aromatic Copper Hydride Cages

Dr Glen Baghdasarian, Dr Jonathan O Tellechea, Dr Carlos Lima, Dr Duke Choi, Dr Dennis Salazar, Dr Marjan Samiei, Dr Angie Keoseyan, Dr Ekaterina Vinogradova, Dr Fangzhi Yan, Dr Daniel Wherritt, Dr Marcos M Alvarez, Robert L Whetten

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Copper clusters are nanoscale materials comprised of a metal core or frame enclosed by a mantle of stabilizing ligands; their exploration offers progress in diverse fields, such as medicine, electronics, and fundamental chemistry as catalysts, reducing agents, corrosion inhibitors, and petroleum sweeteners. When stabilized with dithiocarbamate (DTC) ligands (L), copper clusters show a propensity for reversible hydrogen uptake and a remarkable versatility in size and shape as demonstrated by the facile substitution of the protecting groups and multitude of species attainable. The purpose of this report is to demonstrate the versatility of the Cu-DTC system by the novel use of an aromatic dibenzyl DTC ligand (L’) to generate clusters of previously known composition (i.e., Cu8HL’6 PF6). As demonstrated herein, the new materials are air-stable and amenable to characterization by high-resolution electrospray ionization mass spectrometry, 1H-nuclear magnetic resonance spectrometry, powder X-ray diffraction, Fourier Transform Infrared Spectroscopy, Ultraviolet-Visible spectroscopy, and Inductively Coupled
Plasma Spectrometry. The subject ‑ hydrogen-rich caged cluster materials have potential applications as hydrogen storage sponges to great benefit to material science, energy, and other chemical fields.

Open access Original Article | January 31, 2020
Sustainability of Villages Through Electricity from Wheat Straw in Pakistan

Rizwan Raza, Muhammad Sajid, Muhammad Asad, Adeel Akram, Muhammad Yasir, Muhammad Arshad

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The sustainable and socioeconomic development of any country is based on reliable energy resources which are also to be considered as the lifeline of the country’s development. Pakistan is facing a severe energy crisis. Despite strong economic growth and rising energy demand during the past decade, some efforts have been made to install a new power plant for energy generation but have not achieved any sustainable development in this regard. The aim of this work is to utilize agricultural waste-based biomass like wheat straw to generate electricity in Punjab (PAKISTAN) to overcome the specter of load shedding and to fulfill energy demands in PAKISTAN. In this article, a detailed analysis of the production of wheat and wheat-straw has been debated. It is also studied that such field-based residues are a significant energy resource that can be used to generate electricity, based on clean energy technologies. In this paper, two biomass conversion technologies such as biomass gasification and biomass combustion are discussed in detail. It is also proposed one model village based on the wheat straw to fulfill the electricity demand of the village. Such proposed way can be implemented in the wheat rich areas. Therefore, in this paper, many recommendations have been reported for future consideration. Also, some clean energy-based technologies have been recommended which can lower environmental pollution and CO2. The potential of such waste/residues can be a sustainable source of income for the farmers as well as for the economy of the country. Therefore, some small units can be installed at the village level which can lower the overall energy crises. The impact of this research will be on the country economy, environmental friendly, and socio-economic.

Open access Original Article | February 01, 2020
Physical, Structural and Dielectric Parameters Evaluation of New Mg1-x Cox NiyFe2-yO4 nano-ferrites Synthesized via Wet Chemical Approach

Muhammad Iqbal, Komal Zafar, Muhammad Aadil, Maharzadi Noureen Shahi, Humera Sabeeh, Muhammad Faizan Nazar, Muhammad Asif Yousuf

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The surfactant assisted co-precipitation method has been used to synthesize the Co2+ and Ni2+ substituted magnesium nanoferrites. The Co2+ and Ni2+ ions substitute the Mg2+ and Fe3+ ions from the magnesium ferrites, respectively. To study the effect of substituted ion concentrations on the dielectric performance of the MgFe2O4 spinel ferrites. The substituted magnesium nanoferrites with the compositions Mg1-x Cox NiyFe2-yO4 (x, y =
0.0, 0.1, 0.2, 0.3, 0.4, and 0.5) were synthesized to notice the effect of substituted ions concentration on the dielectric properties. Thermogravimetric analysis of the precursor precipitates was taken to investigate the stable spinel phase formation temperature. The X-ray diffraction analysis of the all substituted samples confirms the successful formation of the stable spinel phase and also exposes the effects of substituted ions on the crystal structure and unit cell constants. The presence of a characteristic absorption band (400 cm−1, 550 cm−1) of spinel ferrites in the Fourier Transform Infra Red (FT-IR) spectrum of substituted magnesium nanoferrites also confirms the formation of desire phase. The effect of temperature on the conductivity of the all substituted samples was observed within the temperature range of 25°C–300°C by two-probe direct current electrical resistivity measurements. Dielectric measurements of the substituted magnesium nanoferrites were carried out to study their magnetic behavior. The inverse relation of the dielectric parameters of the all substituted magnesium nanoferrites with frequency shows their excellent potential for devices that operate at higher frequencies.

About Editor in Chief

Yongsheng Chen, B.S.E., M.S., Ph.D.

Associate Professor Dept of Civil & Environmental Engineering Georgia Institute of Technology, Atlanta, USA, Adjunct Professor Dept of Civil & Environmental Engineering Arizona State University, USA

Dr. Chen has an extensive research interests in environmental science and engineering. More specifically, he is a leading researcher in the environmental applications of nanomaterials and their potential fate, transport, transformation, bioaccumulation and toxicity in the environment. His interests in environmental nanomaterials dated back in his graduate research in 1992. He has also been active on algae based bio-renewable energy and sustainable urban development. Dr. Chen has been principal and co-principal investigator for 28 research projects (by June 2010) funded by the National Science Foundation, U.S. Environmental Protection Agency, NASA, Boeing and other organizations. The total funds are $7 million. He has also served as a review member or panel review member in the U.S. National Science Foundation, the U.S. Environmental Protection Agency, the U.S. Department of Energy evaluation committee.

Yongsheng Chen

Events

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Conference - Materials, The Building Block For The Future

The conference is being organized by AAAFM at the University of California, Los Angeles, (UCLA) USA. Nobel Laureate Sir Fraser Stoddart will give plenary talk at AAAFM-UCLA, 2021 at UCLA.

Click here for more details.