Deviceful LiCl salt hydrate confinement into a macroporous silicone foam for low-temperature heat storage application

Salt Hydrate Adsorption Material-Based Thermochemical Energy Storage for Space Heating Application: A Review

“…The foam A suitable preparation method was selected according to the host matrix type and functional structure requirements. The preparation methods of salt hydrate composite materials are commonly used, as shown in Figure 18: wet impregnation [110], dry impregnation, vacuum impregnation, encapsulation (spray-drying approach), foam synthesis [183], and straightforward mixing [105]. Different preparation methods have a significant influence on the adsorption and desorption properties of materials; thus, the appropriate preparation method must be selected according to the characteristics of the host matrix.…”

“…The salt-silicone foam sample preparation process was implemented as follows (Figure 18c): first, a proper polymer with high permeability for water vapor was employed to form a silicone foam as the host matrix for salts; then, the salts were mixed with the siloxane matrix until a homogeneous slurry was formed; finally, the foaming reaction of the composites was performed in an oven under controlled temperature. materials are commonly used, as shown in Figure 18: wet impregnation [110], dry impregnation, vacuum impregnation, encapsulation (spray-drying approach), foam synthesis [183], and straightforward mixing [105]. Different preparation methods have a significant influence on the adsorption and desorption properties of materials; thus, the appropriate preparation method must be selected according to the characteristics of the host matrix.…”

“…Microporous or macroporous silicon foams are well interconnected, creating a continuity network and effective vapor permeability to allow for vapor flow into or out of pores for both low and high salt contents during the adsorption and desorption phases [164]. Good elasticity and flexibility of this foam can improve the mechanical stability and cyclicity, especially for salt hydrate volume expansion during the adsorption process [164,183,184]. Adsorption capacity of various host matrices at specified conditions [60,110,124,134,150,151,170,181,182].…”

“…Pore volume: 0.64 cm 3 /g [192] specific surface area: 1255 m 2 /g [192] PCN-223 Pore volume: 0.87 cm 3 /g [194] specific surface area: 1884.9 m 2 /g [194] Average pore diameter: 1.85 nm [194] Microporous/Macroporous foam Microcellular (Silicon foam) Average pore diameter: 1.82 nm [195] Bulk density: 975 kg/m 3 [195] High salt loading capacity [195] High porosity [195] Effective vapor permeability [184] Good elasticity and flexibility [184] Macrocellular (Silicon foam) Average pore diameter: 1.18 mm [183] Bulk density: 969 kg/m 3 [183]…”

The Influence of Preparation Parameters on Structural and Optical Properties of N-Type Porous Silicon

“…Macroporous silicon (MPS) is a novel material described as such in the early 1990s by Lehmann et al in their pioneering works [8]- [10] which invented an electrochemical etching process to produce arrays of ordered macropores in silicon [6]. Since its first description, MPS has attracted great interest, and it has been suggested for many applications in several fields such as electronics [11], optics [5], photonics [12] solar cells [13] , and even energy storage [14] fuel cells [6] or catalysis [15] Several methods for the fabrication of ordered MPS have been used such as reactive ion etching, stain etching [16],metal assisted etching [17], direct laser writing (DLW) [18], lithographic methods (layer-by-layer [19], interference lithography [20], block copolymer [21]) and glancing angle deposition [22] However, the electrochemical etching of silicon remains one of the most important and versatile fabrication methods. In this method, the MPS layer is formed on the crystalline silicon (c-Si) by anodic electrochemical etching in aqueous hydrofluoric (HF) solution [23].…”