Sürdürülebilir Kalkınma Amaçları

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• MakaleYalnız künye2026Scopus SJRQ4/r/kostu/10490
  Li Dendrite Interaction Inside Lithium Ion Batteries (LIBs) during Fast and Long Cycling, a Reason of Battery Firing

  Monajjemi, M.; Mollaamin, F.; Shahriari, S.; Hoselepour, P.; Ghadami, A.; Rahpayma, M.; Mohammadi, S.

  Abstract: By this work, we designed and fabricated a temperature monitoring sensor including engineering strategies aimed at enhancing cathode performance by a mechanical hydrogen sensor for early safety warning in electric vehicles. Since generation of H2 due to the reaction of lithium metal and polymers is earlier than the “thermal runaway,” therefore, detection of hydrogen even with negligible amounts by a sensor can be help us as a warning sign. By this work, we investigated sensing mechanism of H2 sensor through the resistive RT H2 detector for early safety warning of LIBs. We also used advanced Techniques for Internal Temperature monitoring in our fabricated sensor. By this work we synthesized various composites with several transition metals mole fraction through sol gel method for cathode materials using situ designing and manufacturing as well as testing of a temperature monitoring sensor. We found composite with structure of LiNi3/18 Co6/18Mn3/18Fe3/18O2 composite has high efficiency and best performance in viewpoint of initial capacity, cyclability, charge capacity, and discharge capacity among these ten composites, as well as safety warning for electric vehicles usage compared with other samples in those cathode materials.

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• MakaleYalnız künye2026Scopus SJRQ4/r/kostu/10443
  Creating High Electrical Capacity through Synthesis Designing of Ternary Composite with Partial Mole Fraction Combination Containing xLiCrO2, yLiCoO2, and (1 – x – y) LiNi1/2Mn1/2O2 Using Cathodic Electrode in Lithium Ion

  Shahriari, S.; Monajjemi, M.; Mollaamin, F.; Rahpayma, M.; Ghadami, A.; Zarghami, K.

  Abstract: In this work, the high potential properties of LiCrO2, as an isostructural material with LiCoO2 was considered for cathode material in lithium ion batteries (LIBs). In addition the lattice parameters and unit-cell position of this compound has also been checked for combination with the structural of LiCoO2 through refinements of X-ray diffraction patterns and bulk modulus through Birch–Murnaghan equation. The objective of this research is to prepare a composite with lower cost and better cyclability than the other cathode materials in lithium ion battery. A ternary composition with high efficiency and low cost containing LiCrO2 and LiNi1/2Mn1/2O2, was applied instead of pure LiCoO2 to reduce usage of the percentage Co amount in cathode materials of LiBs, consequently a benefit would be yielded by reducing the cost and removing the toxic of cobalt, the environment will be safe. In this study, we synthesized ten samples from mixture of xLiCrO2, yLiCoO2, and (1 – x – y) LiNi1/2Mn1/2O2 compounds for preparing suitable cathode electrodes with high initial discharge capacity, large cyclability and inexpensive cost instead of traditional cathode materials. As a result by using Raman Analysis, X-ray diffraction, and electrochemical analyzing, we found that the LiNi1/6Mn1/6Cr1/3Co1/3O2 composite has high efficiency and best performance in viewpoint of initial capacity, cyclability, charge capacity, and discharge capacity among these ten composites. After Raman analysis, since X-ray photoelectron spectroscopy (XPS) is an advanced method that evaluates the valence, composition percentages and the empirical formula of the elements, we used these methods for some of the samples.

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• MakaleAçık Erişim2026Scopus SJRQ4/r/kostu/10398
  Designing Microbial Fuel Cells (MFCs) Including Geothrix fermentans and Gluconobacter oxydans Bacteria: Invistegation with Numerical Analysis

  Monajjemi, Majid; Mollaamin, Fatemeh; Mohammadi, Samira; Shahverdy, Yasamin; Rahpayma, Mersedeh

  In this work, we exhibited the effect of temperature and also cell dimensions on the microbial fuel cells (MFCs) efficiency according to our experimental data. In other words, microbial fuel cells (MFCs) are emerging as promising technologies for applications such as electricity generation. Electroactive (EA) biofilms formed by microorganisms play a central role in bioelectrochemical systems through microbially mediated electrocatalytic reactions. In this study, industrial wastewater containing Geothrix fermentans and Gluconobacter oxydans was evaluated for power generation in MFCs. The effects of temperature, reactor configuration, chamber dimensions, and the distance between anodic and cathodic electrodes on electrical output were systematically investigated. Statistical analyses, including descriptive statistics, correlation, and regression, were performed using SPSS to predict average voltage from the derived regression model. A two-dimensional model was further employed to analyze ionic transport, the distribution of electronic current density, and local reaction rates in both anodic and cathodic chambers. Two types of bacteria were examined: the anaerobic Geothrix fermentans, known for its ability to utilize Fe(III) and other high-potential metals as electron acceptors, and the aerobic Gluconobacter oxydans, tested in a miniature MFC (mini-MFC) system. The results indicated that the aerobic mini-MFC achieved a lower maximum power output than the anaerobic system. Additionally, numerical fitting was performed for MFCs operating under varying temperatures and chamber dimensions. The numerical results showed strong agreement with experimental data, confirming the validity of the proposed model.

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• MakaleYayıncıda açık erişim2026Scopus SJRQ3/r/kostu/10232
  Experimental Study and Numerical Calculations to Increase the Electricity Generation of Microbial Fuel Cells (MFCs): A Comparison for Creating Voltages using Various Bacteria from Waste Materials

  Monajjemi, Majid; Mollaamin, Fatemeh; Rahpayma, Mersedeh.; Fakhraian, Elnaz

  MFC is a significant devices that enable the generation of electricity through anaerobic fermentation of waste materials using microbes as bio-catalysts. Since this work focuses on the electricity production of microbial fuel cells (MFCs) of various bacteria from waste materials, we studied the efficiency of industrial waste materials and soil composition containing several bacteria, including E. coli, Shewanella putrefaciens, Geobacter sulfurreducens, and Lactobacillus, that are able to create large amounts of suitable electrical power through the MFC. We followed two main approaches in this work: first, testing the efficiency of MFCs, such as the percentage of organic matter in each sample; and second, evaluating the electrical capacity of MFCs due to thermal limits. To study the process performance, the effects of temperature, structures, dimensions, and the distance between the cathodic and anodic chambers on the electrical power were investigated, and the amperage and voltage outputs from electrochemical and microbial cells were recorded. Additionally, in this work, we modeled a steady state using mathematical simulation based on mass, charge, and energy balances for MFCs. The data obtained from the numerical calculation matched our experimental results exactly. Finally, in contrast to most MFC work, which has long-term targets for renewable energy from wastewater, this study can be used immediately in practice. This work also confirms that the electricity production of MFCs can be increased by selecting appropriate conditions for sample type, temperature, and chamber size.

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