The multistep sorption-reaction cycle utilizes heat from several processes, such as absorption, dilution, crystallization reaction, and thermochemical reaction. So, it is very attractive to use multistep sorption technology to improve the performance of temperature transmitter, air conditioning, and heat pump. Different working pairs of silica gel/LiCl, activated carbon/LiCl multiwalled carbon nanotubes/LiCl, and multiwalled carbon nanotubes/CaCl2 are tested and compared. The results show that the water uptake of these compound adsorbents varies with different salt mass fraction. The water uptake goes up dramatically at the crystallization and deliquescence point. Compared with the energy storage performance under the same working conditioning, the activated carbon/LiCl has the best performance, and the possible reason is that the activated carbon has the largest specific surface and the smallest average pore diameter.