Thermochemical heat storage material is very promising to realize long-term heat storage. In this paper,
Li-doped Ca(OH)2 prepared by ball grinding is compared with pure Ca(OH)2 to study the influence of Li
doping amount on heat storage speed by thermogravimetric (TG) experiment. Furthermore, the heat
storage capacity (including the reaction enthalpy and specific heat capacity) with Li doping is studied,
and the related kinetic control equation is derived. The results show that the heat storage capacity
remains almost unchanged with Li doping, but the kinetic process of Ca(OH)2 heat storage with Li doping
is divided into two stages which can be analyzed from the molecular structure. There is an interesting
coincidence in the reduction of energy between the apparent activation energy and the energy barrier of
Ca(OH)2 dehydration process with Li doping. Finally, the theoretical results using the kinetic control
equations agree well with the experimental results