Adsorption chillers offer an environmentally friendly alternative to conventional cooling systems. Unlike electrically driven technologies, they can utilize low-grade heat sources, such as waste heat or solar energy, and operate without mechanical moving parts or harmful refrigerants, which contributes to improved durability and reduced environmental impact. However, their efficiency remains relatively low due to thermodynamic limitations and depends strongly on factors such as adsorbent properties, heat and mass transfer efficiency, and system design. To address the challenge of low COP, various optimization strategies have been proposed, including the application of advanced thermodynamic cycles, improved heat exchangers, and optimized working pairs. One promising approach to enhancing adsorption chiller performance is the replacement of conventional silica gels with advanced composite sorbents. This study investigates the synthesis and characterization of such materials, with particular emphasis on their sorption properties and thermodynamic performance. The composite sorbents, based on silica gel matrices impregnated with inorganic salts, were designed to increase water vapor uptake compared with unmodified silica gels, thereby improving the efficiency and operational performance of adsorption chillers. The synthesis and testing were carried out using three types of silica gel matrices, denoted as A, B, and C, which differed in pore size distribution. These matrices were impregnated with solutions of NaCl, CaCl₂, and LiBr at different mass fractions: 10%, 20%, 30%, and saturation level. The aim of the study was to determine the sorption capacity of the prepared materials toward water vapor and to identify the most promising candidates for adsorption chiller applications. In the first stage, a moisture analyzer was used to evaluate the desorption behavior of the samples and to select the most suitable sorbents for further analysis. The selected samples were then examined using Dynamic Vapor Sorption (DVS) at 30 °C and 60 °C, as well as thermal conductivity measurements. The conducted analyses enabled the identification of sorbents with high water vapor uptake capacity and provided an assessment of their potential for industrial-scale application in adsorption cooling systems.