Energy Storage最新文献

Metal-ion batteries are in huge demand to cope with the increasing need for renewable energy, especially in automobiles. In this work, we apply first-principle calculations to examine two-dimensional beryllium carbide (2D-Be₂C) as a possible anode material for metal-ion (Na and K) batteries. 2D-Be₂C is a semiconductor and becomes metallic by adsorbing metal ions. Negative adsorption energy indicates stable adsorption on the monolayer of Be₂C. Alkali metal diffusion barrier and optimum path for minimum energy are studied within the framework of the climbing image nudged elastic band method. Here, six intermediate images are considered between the initial and final states. The lowest diffusion barriers for a single adsorbed Na and K atom are 0.016 and 0.026 eV, respectively. A maximum open circuit voltage of around 1 V is computed for K ions, whereas 0.5 V is for Na ions. Also, the maximum storage capacity of the Be₂C monolayer is estimated at 1785 Ah/kg.

Lithium-ion batteries are vital power sources for modern society, especially mainly powered electronic devices, electric vehicles (EVs), and future stationary energy storage. Battery cost is still challenging for EVs and large-scale applications that continuously require the development of low-cost and abundant elements-based materials for sustainable battery manufacturing. SiO₂ derived from rice husks emerges as a promising anode material owing to its advantageous raw source and cost-effectiveness. However, the material's low electronic conductivity and poor lithium-ion diffusion rate make it unsuitable for fast-charging or high-power applications. To overcome these challenges, graphene nanoplatelets have been introduced as a conducting additive to enhance electronic conductivity and optimize lithium diffusion in the battery. In this research, an ultrasonic method was utilized to create a composite of C/SiO₂/graphene using C/SiO₂ derived from rice husk and graphene nanoplatelets. The mixture containing 85 wt% of graphene exhibited superior electrochemical performance among the investigated ratios with excellent cycling performance (305 mAh g⁻¹ with capacity retention of 86.18% after 50 cycles at 0.1 A g⁻¹) and an impressive rate capability (69.9 mAh g⁻¹ at a high current of 2.0 A g⁻¹, nearly three times higher than the bare C/SiO₂). XPS and GITT analysis confirmed that the solid electrolyte interphase (SEI) layer on the C/SiO₂/graphene electrode was more stable and conductive due to higher LiF-Li₂CO₃ content, which enhanced the lithium diffusion from the graphene's high surface area.

With advances in technology and the increasing use of nanomaterials, ongoing research is focused on improving the performance of thermal systems. This study investigates the thermal conductance (UA) of a radiator using aqueous suspensions of carbon nanotubes (CNTs), which are among the nanomaterials with the highest heat transfer coefficient. For this purpose, three different nanofluids were prepared, each with varying concentrations of single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs). The heat transfer performance of three hybrid nanocoolant fluids (NF), namely, NF1 (0.8 wt% MWCNT + 0.4 wt% SWCNT), NF2 (0.4 wt% MWCNT + 0.4 wt% SWCNT), and NF3 (0.4 wt% MWCNT + 0.8 wt% SWCNT), was experimentally examined and compared with water. The results show that CNT suspensions can enhance heat transfer by up to 16.9% compared with the base fluid, and SWCNTs were observed to have better thermophysical qualities than MWCNTs.

This study investigates the potential of using phase change material (PCM) in a building using an air handling unit (AHU) assisted by solar energy. To further enhance the system, an energy storage system (ESS) can be considered. Implementing ESS would allow the captured solar energy to be stored efficiently, ensuring a continuous and reliable power source for cooling or heating the air, even during non-sunlight hours. The air-conditioned zone is considered to be 220 m² in which 30 people work for 12 h a day. An energy analysis is conducted to evaluate the performance of the proposed system in terms of energy and exergy loss. The genetic algorithm (GA) method is used to optimize the system. The results indicate that the system, including PCM and solar system, can reduce energy consumption by up to 8.9% compared to conventional AHUs in the hottest month of the year (July). The results indicated that employing PCM leads to a decrease of 124 kWh in heat loss during January and 229 kWh in heat gain during July. Taking into account the beneficial impacts of both PCM and the solar system, the yearly assessment demonstrates a 2.69% reduction in power demand, equating to an energy saving of 679 kWh. Furthermore, PCM in the proposed system can be used in integration with AHUs based on renewable energy systems to store renewable energy for buildings.

This study delves into the unique characteristics of an iron chloride cathode with a solid-state electrolyte (SSE) and the construction of a button cell battery (BT cell) for its evaluation. The iron ions in this system can provide either divalent or trivalent ions, which possess a higher electrical capacity (~200 mAh/g) and competitive advantages. The solid-state electrolyte materials, iron compounds (chloride, oxide), exhibit high activation in electrochemistry. After the cycle test, the ferric chloride electrolyte transforms into another iron hydroxide compound due to its high activation. The study examines iron, ferric oxide (Fe₂O₃), and ferrous chloride (FeCl₂) as cathode materials and evaluates their impact on the battery. Cyclic voltammetry compares the potential and current values of the redox reactions among the three. Finally, transmission electron microscopy (TEM) explores the ferric chloride layer and iron hydroxide in ferrous chloride. The study focuses on the high electrochemical activity of the iron chloride layer and explores the crystal structure and composition for electrochemical analysis. The findings of this study are crucial for understanding the potential of iron-ion batteries and the role of iron compounds in improving battery performance.

5-Methoxy-2-mercaptobenzamidazole was used to synthesize O-ethyl-S-(5-methoxy-1H-benzo[d]imidazol-2-yl) carbonothioate (OESMBIC) by the reaction with chloroacetic acid ethyl ester in a KOH solution. The reaction product (OESMBIC) was characterized using Fourier transform infrared (FTIR), melting point, and ¹H-NMR. The characteristic results prove the formation of the target compound with high purity. Furthermore, the work includes the synthesis of ZnO and TiO₂ nanoparticles via chemical methods in the high alkalinity solution. These nanoparticles were used to synthesize two novel nanocomposites named OESMBIC-ZnO and OESMBIC-TiO₂. The synthesized nanocomposites were characterized by FTIR, SEM, EDX, TEM, and XRD. The results prove that the prepared titanium oxide as nanotubes with diameters ranging between 20 and 35 nm decorated with OESMBIC. The results prove that ZnO in OESMBIC-ZnO was found as nanorods with different lengths and diameters of 40–65 nm decorated with OESMBIC molecules. The as-prepared compounds; OESMBIC, OESMBIC-ZnO, and OESMBIC-TiO₂ were used for the hydrogen storage application using the VTI method. The results prove that the addition of ZnO and TiO₂ nanoparticles enhanced the storage ability of OESMBIC as the OESMBIC gave only 0.50 wt% at an equilibrium pressure of 40 bar, while it reached 2.40 and 4.37 wt% at equilibrium pressures of 60 and 75 bar for OESMBIC-ZnO and OESMBIC-TiO₂, respectively.

The majority of the water on Earth roughly 97% is contaminated or salty, only 3% is fresh water, and only 1% of pure water is easily available for human use. In rural areas and remote locations suffering from pure drinking water scarcity.Water purification techniques are generally dependent on electricity, which relies on coal and gas plants, these poses a risk to the environment and society. Solar desalination is being recognized as the most practical way to deal with the scarcity of pure drinking water in all aspects of sustainable development. This paper describes the creation of a single slope solar still (SSSS) using opaque and crystal-clear toughened glass with a thickness of 6 mm as a cover and also another setup of a single slope phase change material (PCM)-based solar still (MSSSS). In this paper, a flat plate solar collector coupled with water heater is used to enhance the productivity of still. In this study, an experimental model has been developed to experimentally analyze exercise productivity performance of SSSS and MSSSS of MMIT Kushinagar, India on April 10, 2023 to April 15, 2023. Combination of stearic acid, lauric acid, and paraffin wax combined with CuO (nanoadditive) is used to enhance the solar still productivity. Also, basin temperature for different PCM's such as paraffin wax, lauric acid, and stearic acid are compared. Different combinations of PCM's and nanoadditives are compared to find the better productivity. It is observed that maximum output is obtained at 3:00 p.m. afternoon on experimental setup. Paraffin wax, stearic acid, and lauric acid still increases productivity by 38.8%, 20.3%, and 30.5%, respectively, when compared to simple solar still. On experimentation of various combinations, it is found that the use of PCM paraffin wax and nanoadditives CuO gives 55% better productivity compared to other combinations. This innovative system is suitable and ideal for desalinating water in isolated and rural locations with low traffic and limited demand.

Environmental concerns and energy security are pressing issues of the 21st century, with a heavy reliance on fossil fuels causing significant environmental pollution and resource depletion. To mitigate these problems, it is crucial to explore and implement alternative clean energy sources. This manuscript proposes a novel crayfish optimization algorithm (COA) for optimal scheduling in a hybrid power system that incorporates various renewable energy sources, like battery energy storage systems (BESS), fuel cells (FC), wind turbines (WT), micro turbines (MT) and photovoltaic (PV) panels. The importance of the work lies in its ability to optimize the entire operating costs of a grid-connected microgrid while improving the accuracy and efficiency of energy management. The COA method addresses economic dispatch problems and manages energy within the grid-connected microgrid, accounting for high levels of uncertainty. The proposed approach, tested using MATLAB Simulink, achieved a cost value of 252, outperforming existing methods such as GTO, PSO, SSA, and ALO. This illustrates the potential of the proposed technique to provide more cost-effective and efficient energy management solutions in hybrid power systems.