Flexible core–shell structured Al-Cu alloy phase change materials for heat management

Zhou, Cheng; Jiang, Lei; Gu, Zhi‐Gang; Wang, Chunliang; He, Lun; Huang, Linan; Li, Zhiqiang; Li, Kongzhai

doi:10.1016/j.cej.2023.144610

Cited by 10 publications

(2 citation statements)

References 49 publications

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“…Solar energy, the most renewable, inexhaustible, and environmentally friendly energy source, has attracted widespread attention in recent decades due to the global fossil energy crisis and serious environmental pollution. − Among the approaches for harnessing solar energy, solar–thermal conversion and storage are considered the most promising owing to their operational simplicity and superior energy conversion efficiency. − However, the large-scale utilization of solar–thermal conversion technology is severely restricted by the intermittency, inefficiency, and volatility of solar irradiation. − Phase-change materials (PCMs) are widely applied as efficient thermal energy storage (TES) materials owing to their high TES density and isothermal phase transition temperature during the phase transition process. − Introducing PCMs into solar–thermal conversion systems has been deemed the most interesting and effective approach for overcoming the intermittency and inefficiency of solar irradiation. , Currently, there is a large volume of studies that demonstrate the promising application of PCM in buildings based on TES and solar–thermal conversion and storage. − Numerous substances, including organic materials (e.g., n -alkanes, polyethylene glycols, fatty acids, and polyols) and inorganic materials (e.g., salts, hydroxides, salt hydrates, and metals), have been developed for TES. − …”

Section: Introductionmentioning

confidence: 99%

Nb₂CT_x MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Tang,

Cheng,

Yue

et al. 2024

ACS Appl. Energy Mater.

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Although organic phase-change materials (PCMs) have been widely used for thermal energy storage, their high flammability, poor photothermal conversion efficiency, and liquid leakage issues severely restrict their practical applications in solar−thermal fields. Herein, novel formstabilized composite PCMs (CMPCMs) with high energy storage density, excellent flame retardancy, and desirable photothermal conversion efficiency were prepared by impregnating n-docosane into phytic acid (PA)/melamine (MEL)-modified Nb 2 CT x MXene/delignified wood (CMDW) under vacuum assistance. The interconnected three-dimensional porous CMDW supported n-docosane and avoided PCM leakage, owing to its strong surface tension and capillary forces. Differential scanning calorimetry analysis revealed that the CMPCMs exhibited satisfactory encapsulation ratios (up to 91.6%) and superior energy storage densities (190.2−219.5 J/g). Decorating delignified wood through Nb 2 CT x MXene nanosheet deposition considerably improved the solar−thermal conversion efficiency (up to 89.5%). Furthermore, with the increasing content of PA and MEL in the composites, the total heat release and peak heat release rate of the CMPCMs decreased remarkably due to the synergistic nitrogen−phosphorus flame-retardant mechanism, suggesting improvement in the flame-retardant properties of the CMPCMs. Overall, the shape-stabilized composite CMPCMs demonstrate tremendous potential for solar−thermal conversion and thermal management applications.

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Section: Introductionmentioning

confidence: 99%

Nb₂CT_x MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Tang,

Cheng,

Yue

et al. 2024

ACS Appl. Energy Mater.

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“…Binary aluminum-based alloys are widely used in life production; this paper mainly studies three binary liquid alloys, Al-Cu, Al-Ni, and Al-Fe. Al-Cu alloys can be prepared by Al-Cu alloy flexible nuclear shells and are used in new energy storage materials, which have the advantages of a small footprint, large capacity, and good stability, and are more suitable for high-temperature heat storage [3]. Al-Ni alloy is a typical energy-containing structural material, which has very broad application prospects in both military and civil fields, such as making energy-containing breakers and energy-containing drug masks, etc.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Activity and Molar Excess Gibbs Energy of Binary Liquid Alloys Al-Cu, Al-Ni, and Al-Fe from the Partial Radial Distribution Function Simulated by Ab Initio Molecular Dynamics

Lu,

Chen,

Zhang

et al. 2023

Metals

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To accurately and conveniently obtain the thermodynamic data of binary liquid alloys, a new method is proposed in this study. It combines ab initio molecular dynamics (AIMD) simulation with a thermodynamic model to estimate the activity and molar excess Gibbs energy of binary liquid alloys. Additionally, two methods of grouping the partial radial distribution function (PRDF) of 5000 steps obtained by simulation are proposed for the first time. The PRDF of Al50Cu50, Al50Ni50, and Al50Fe50 is obtained by AIMD simulation. These PRDF are combined with four thermodynamic models to estimate the activity and molar excess Gibbs energy. Furthermore, the estimation results of the four models are compared with those of the Miedema model. The results show that when the first peak of the PRDF is obtained by the symmetric method, the average relative deviation (ARD) of the activity and molar excess Gibbs energy of the four models are, respectively: 28% and 32% for Molecular Interaction Volume Model (MIVM); 162% and 38% for Regular Solution Model (RSM); 508% and 65% for Wilson model; 562% and 67% for Non-Random Two-Liquid (NRTL). When the first peak of PRDF is obtained by non-symmetric method, the average ARD of the activity and molar excess Gibbs energy of the four models are, respectively: 64% and 20% for MIVM; 115% and 26% for RSM; 661% and 70% for Wilson; 727% and 72% for NRTL. In addition, the average ARD of the activity and molar excess Gibbs energy of the Miedema model are 113% and 33%. These data indicate that the estimation performance of the MIVM model is superior to the other four models, and the symmetric method performs better than the non-symmetric method. The grouping treatment of PRDF data effectively improves estimation performance.

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Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

Xu,

Shi,

et al. 2024

Adv Funct Materials

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Phase change materials (PCMs) have attracted increasing attention due to their efficient heat storage capability and small temperature fluctuation. And encapsulation has been recognized as an effective method to solve issues such as corrosion and leakage. For a long time, restricted by thermal expansion, encapsulation of PCMs has remained in the low‐temperature field and liquid‐state coating. In recent years, with the expansion of PCMs encapsulation into the medium and high temperature field and the development of solid‐state coating technology, encapsulation methods that consider thermal expansion have greatly improved the cycle life of encapsulated PCMs and make solid‐state coating of medium and high temperature PCMs possible. Herein, first, this paper summarizes the thermal expansion rates of common core and shell materials, as well as the thermal expansion behavior and stress analysis within confined spaces, proposing the necessity to solve thermal expansion issues. Subsequently, the solution strategies for solving thermal expansion issues in both macrocapsules and microcapsules are introduced. On this basis, the advantages and disadvantages of each strategy have been compared, and the applications of encapsulated PCMs after resolving thermal expansion issues have been introduced. Finally, the current issues, corresponding solutions, and future research directions have been put forward.

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Flexible core–shell structured Al-Cu alloy phase change materials for heat management

Cited by 10 publications

References 49 publications

Nb₂CT_x MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Nb₂CT_x MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Estimation of Activity and Molar Excess Gibbs Energy of Binary Liquid Alloys Al-Cu, Al-Ni, and Al-Fe from the Partial Radial Distribution Function Simulated by Ab Initio Molecular Dynamics

Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

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Flexible core–shell structured Al-Cu alloy phase change materials for heat management

Cited by 10 publications

References 49 publications

Nb2CTx MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Nb2CTx MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Estimation of Activity and Molar Excess Gibbs Energy of Binary Liquid Alloys Al-Cu, Al-Ni, and Al-Fe from the Partial Radial Distribution Function Simulated by Ab Initio Molecular Dynamics

Thermal Expansion Challenges and Solution Strategies for Phase Change Material Encapsulation: A Comprehensive Review

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Nb₂CT_x MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage

Nb₂CT_x MXene/Delignified Wood–Supported Phase-Change Composites with Desirable Photothermal Conversion Efficiency and Enhanced Flame Retardancy for Solar–Thermal Energy Storage