Thermochemical energy storage is a promising approach for achieving high energy densities in thermal energy storage technology. In this regard, calcium hydroxide has been extensively studied for its potential use in thermochemical energy storage owing to its abundant availability and environmental friendliness. However, the low thermal conductivity of pure calcium hydroxide powder limits its performance in thermal energy storage applications. To overcome this limitation, this paper proposes a composite material that combines silicon-impregnated silicon carbide ceramic honeycombs with calcium hydroxide to enhance heat transfer. A laboratory-scale fixed-bed reactor is used to evaluate the performance of the synthesized composites. The honeycomb composite exhibits a discharge power density of 1.33 kW L_bed⁻¹ (at 5 min during the hydration of calcium oxide), which is 1.7 times that of the reference pure powder. This result demonstrates the improved heat transfer performance of the composite. In addition, a three-dimensional numerical model of the composite is developed using the finite element method and validated using experimental results. The findings of this study demonstrate that this composite material featuring a ceramic honeycomb is a practical and effective option for enhancing heat transfer in thermochemical energy storage.