Storage Properties Research Articles

Enhanced comprehensive thermal performance of ternary composite phase change materials with graphite powder hybridizing expanded graphite/erythritol

ABSTRACT Sugar alcohols are considered highly promising medium-temperature phase change materials (PCMs) due to their superior overall performance. In this study, erythritol (Ery) was used as the base PCM, with expanded graphite (EG) and graphite powder (G) as additives. Ternary composite PCMs were prepared using a melt blending method, and their thermal storage properties were systematically characterized. The results showed that the two ternary composite PCMs, 1.5 wt% G/1.5 wt% EG/Ery and 4.5 wt% G/1.5 wt% EG/Ery, exhibited the best overall thermal performance, with excellent heat storage and crystallization heat release characteristics. While maintaining the same melting point, these two composite PCMs retained high melting enthalpies, specifically 325.8 kJ/kg and 316.1 kJ/kg, respectively. Their thermal conductivities reached 2.11 W/(m·K) and 2.48 W/(m·K), representing an increase of 2.0 and 2.5 times compared to Ery, with thermal effusivities improved by 45.8% and 57.0%, respectively. The crystallization enthalpy increased to 233.6 kJ/kg and 230.8 kJ/kg, with heat release ratios improved by approximately 10%. Additionally, thermal stability was significantly enhanced, with decomposition temperatures increased by 21.6°C and 15.1°C, respectively. Both PCMs maintained good cycling stability over 40 consecutive heating-cooling cycles and were more economical compared to other composite PCMs of Ery.

Polydopamine-Mediated Nanofillers Reinforced Zwitterion Hydrogel Electrodes for Supercapacitors in Bioelectronics.

Supercapacitors that can function when in direct contact with human tissue are of paramount importance for wearable bioelectronics but face mismatching with biological tissue and its movement. Herein, we developed a zwitterion hydrogel elastomer electrode-based all-hydrogel supercapacitor (AHSC) characterized by good energy storage properties, bioadhesion, body movement-matching mechanical properties, and biocompatibility. These functions were realized by integrating a [2-(methacryloyloxy)ethyl]dimethyl-(3-propylsulfonate)ammonium hydroxide (DMAPS) and hydroxyethyl acrylate (HEA)-copolymerized zwitterion hydrogel electrode (DMAPS-HEA) with redox-active nanofillers. This hydrogel electrode endowed AHSC with body movement-matching mechanical properties and biocompatibility. Redox-active nanofillers were designed with the structure of a reduced graphene oxide (rGO)-anchored cobalt/nickel bimetallic metal-organic framework (Co/Ni MOF) using polydopamine (PDA). The Co/Ni MOF contributes to the high energy storage performance. rGO enhances the conductivity, whereas PDA introduces catechol groups, contributing to the bioadhesion. This AHSC serves as a flexible alternative to traditional rigid and low-tissue-affinity power supply devices in bioelectronics.

Synthesis, Crystal Structure, and Hydrogen Storage Properties of an AB3-Based Alloy Synthesized by Disproportionation Reactions of AB2-Based Alloys

Synthesis, Crystal Structure, and Hydrogen Storage Properties of an AB₃-Based Alloy Synthesized by Disproportionation Reactions of AB₂-Based Alloys

Modulating energy storage and electrocatalytic properties of molybdates through forming solid solutions

Modulating energy storage and electrocatalytic properties of molybdates through forming solid solutions

Polyoxometalate Nanomaterials for Tumor Phototherapy

AbstractPolyoxometalates (POM) are a class of inorganic metal oxides with distinctive structural characteristics, compositional versatility, high catalytic efficacy, and convenient storage properties. In recent years, POM have shown considerable potential for mimicking enzyme activities. Besides their biological activities, POM have been demonstrated to possess the ability to sense diseases and perform synergistic therapies based on their redox and near‐infrared absorption properties. Similar to the metallic nanoparticles and the organic materials, these inorganic clusters also exhibit distinctive photothermal imaging and therapeutic properties. Based on this, the current review focuses exclusively on the application of POM in the photothermal therapy of tumors. Furthermore, the advantages and the potential issues associated with the current POM‐based nanomaterials in tumor therapy are discussed and analyzed.

Influence on the microstructure and hydrogen storage properties of Y–TiFe-based composites with transition metals via mechanical milling

Influence on the microstructure and hydrogen storage properties of Y–TiFe-based composites with transition metals via mechanical milling

Experimental and numerical study on cold storage properties of organic/inorganic composites in thermal energy storage

Experimental and numerical study on cold storage properties of organic/inorganic composites in thermal energy storage

High dielectric energy storage properties of chitin matrix composites regulated by SiO2.

High-performance polymer-based dielectric materials have attracted much attention in the field of energy storage due to high breakdown field strength and low cost. However, partial polymer-based materials are derived from traditional fossil energy derivatives, which are characterized by non-renewable and low dielectric constants, which are not conducive to the improvement of energy storage. In this paper, dissolved chitin through alkali/urea system is composited with SiO2 prepared by electrostatic spinning. The maximum discharge energy density of the fiber composite film reaches 4.34Jcm-3, which is 1.6 times higher than that of the micron particle composite film (2.8Jcm-3) and 1.9 times higher than that of the pure chitin film. The high aspect ratio and low concentration of silica filler effectively improved the breakdown field strength. In addition, the thermal stability was improved. This study paves the way for the application of bio-based materials in high-performance dielectrics.

Effects of in-situ formed Mg2Ni and Mg2Cu phases on hydrogen storage properties of Mg@Cu9Al4 composite

Effects of in-situ formed Mg2Ni and Mg2Cu phases on hydrogen storage properties of Mg@Cu9Al4 composite

Electronic, optical, Na-Ion storage properties of aminobenzene-pillared graphene framework explored by first principles study

Electronic, optical, Na-Ion storage properties of aminobenzene-pillared graphene framework explored by first principles study

Nitrogen-doped corn stover-based porous carbon by double-defect synthesis strategy for highly lithium storage properties

Nitrogen-doped corn stover-based porous carbon by double-defect synthesis strategy for highly lithium storage properties

Enhancing high-temperature energy storage properties of polyetherimide dielectrics by constructing hierarchical Coulomb blockade layers of gold nanoparticles

Enhancing high-temperature energy storage properties of polyetherimide dielectrics by constructing hierarchical Coulomb blockade layers of gold nanoparticles

Nitrogen-doped lignin mesoporous carbon/nickel/oxide nanocomposites with excellent lithium storage properties

Nitrogen-doped lignin mesoporous carbon/nickel/oxide nanocomposites with excellent lithium storage properties

Development of soft eutectic phase change material modified with expanded graphite for thermal energy storage and human comfort applications

Organic phase change materials (PCMs) have gained huge importance for thermal energy storage systems, but their applicability is restricted due to their low thermal conductivity and hardness. The aim of this research work is to solve the problem by developing a novel organic binary eutectic PCM employing paraffin wax and coconut oil in the eutectic mixture (ratio 1:1) to soften the PCM for thermal comfort applications. 3D expanded graphite (EG) was used as a filler to enhance the thermophysical properties of eutectic-EG PCM composite formed by melt-mixing technique. The percolation limit of EG was 0.5 wt-% to form the thermal network in PCM matrix. The thermal conductivity of eutectic-EG PCM composite enhanced significantly from 0.2 W m−1 K−1 to 0.55 W m−1 K−1 at 2 wt-% of EG in pristine PCM. Differential scanning calorimetry (DSC) was carried out to analyse the energy storage enthalpies and temperatures of composites. The 50 consecutive thermal heating and cooling cycles performed by conventional heating system showed the good thermal reliability of the composite. The numerical 2D simulation was conducted to reveal the heat propagation behaviour in the developed composite with the post-EG addition and to validate the enhanced thermal conductivity results obtained experimentally. The cost analysis results reveals that the cost per mean power of the composite is composite is approximately 100% lower than the pristine PCM. The developed composite's outstanding energy storage property indicates its potential for developing the soft heating pads/cartridges for human comfort and also the solar thermal energy storage applications for medium temperature ranges.

The effect of sunflower wax and carnauba wax on the storage stability and sensory evaluation of palm-based chocolate spread

This study investigates the storage properties and sensory evaluation of palm-based chocolate spreads formulated with sunflower wax (SFW) and carnauba wax (CW) in a wide range of temperatures. Hardness, spreadability and stability assessments of chocolate spreads with 3.5% SFW and 3.5% CW were made over a 24-week storage period. The hardness, spreadability and stability of the chocolate spreads were analyzed by means of Texture Analyzer, observation and LUMiFuge Stability Analyzer, respectively. A sensory evaluation of these chocolate spreads was conducted using a 7-point hedonic scale. The hardness of both chocolate spreads was influenced by low temperatures of 5-10 °C during the storage study. Decreasing and increasing trends were observed for samples stored at 5 and 10 °C, respectively. However, both palm-based chocolate spreads remained spreadable at 5 °C even after 24 weeks of storage. Both chocolate spreads demonstrated stability at 40 °C after 24 weeks of storage. The sensory evaluation revealed that chocolate spread with 3.5% CW was the most widely accepted by sensory panelists. Therefore, chocolate spread with 3.5% CW has the potential to be utilized over a wide range of temperature applications of 5-40 °C.

Correction: Xu et al. Effects of Different Landscape Greening Pest Control Modes on Carbon Storage and Soil Physicochemical Properties. Forests 2024, 15, 2235

Correction: Xu et al. Effects of Different Landscape Greening Pest Control Modes on Carbon Storage and Soil Physicochemical Properties. Forests 2024, 15, 2235

High-Entropy Alloys: Innovative Materials with Unique Properties for Hydrogen Storage and Technologies for Their Production

High-Entropy Alloys: Innovative Materials with Unique Properties for Hydrogen Storage and Technologies for Their Production

Heterointerface Built Up by Ultrathin Amorphous MoO3 Conformal Coating Enables V5O12·6H2O with Superior Properties for Aqueous Zinc Batteries.

Layered V5O12·6H2O is a promising candidate for aqueous zinc batteries (AZBs) but with moderate electrochemical performances. Herein, the charge storage properties of V5O12·6H2O are markedly improved by building up the heterointerface on its surface using amorphous molybdenum trioxide as the heteromaterial. The amorphous molybdenum trioxide functioning as the proton reservoir enables the proton-involved electrochemical reactions and induces the formation of a built-in electric field along the [001] orientation at the heterointerface constructed by the (001) plane of V5O12·6H2O, which could provide new diffusion pathways and extra sites for ion storage. As a result, V5O12·6H2O with significantly improved kinetics realizes an ultrahigh capacity of 510 mAh g-1, better rate capability, and prolonged lifespan. This work provides general guidance for designing advanced cathode materials for AZBs with respect to heterostructure.

Fast Charging of Silicon Anode-Based Lithium-Ion Batteries at the Pouch Cell Level

Abstract Silicon (Si) is an attractive anode material for next-generation lithium-ion batteries (LIBs) because of its high theoretical capacity and natural abundance. Therefore, its physical and energy storage properties, especially achieving high specific capacity and cyclability, have been studied extensively. However, there is a lack of reports on the proper fast charging of Si-based LIBs. Herein, we developed an anode by physically mixing Si nanoparticles with carbon nanotubes and assembled a three-electrode pouch cell by pairing the developed anode with a lithium nickel manganese cobalt oxide cathode and an extra reference electrode. The reference electrode was crucial in developing a fast-charging protocol (FCP) that not only fast-charged the cell but also prevented lithium plating, which is essential for extending the cycle life of LIBs. The FCP achieved 10–80% and 0–80% states of charge in 14.5 and 20.5 minutes, respectively, at room temperature. The FCP achieved ~55% capacity retention (616 mAh g-1) after 500 fast-charging cycles, indicating excellent cycle stability and good battery health. This work presents FCP and its performance data from Si-based LIBs to the battery community, which can be crucial to exploring the fastest possible FCP for next-generation high-energy-density LIBs.

High-entropy engineered BaTiO3-based ceramic capacitors with greatly enhanced high-temperature energy storage performance

Ceramic capacitors with ultrahigh power density are crucial in modern electrical applications, especially under high-temperature conditions. However, the relatively low energy density limits their application scope and hinders device miniaturization and integration. In this work, we present a high-entropy BaTiO3-based relaxor ceramic with outstanding energy storage properties, achieving a substantial recoverable energy density of 10.9 J/cm3 and a superior energy efficiency of 93% at applied electric field of 720 kV/cm. Of particular importance is that the studied high-entropy composition exhibits excellent energy storage performance across a wide temperature range of −50 to 260 °C, with variation below 9%, additionally, it demonstrates great cycling reliability at 450 kV/cm and 200 °C up to 106 cycles. Electrical and in-situ structural characterizations revealed that the high-entropy engineered local structures are highly stable under varying temperature and electric fields, leading to superior energy storage performance. This study provides a good paradigm of the efficacy of the high-entropy engineering for developing high-performance dielectric capacitors.