¡-LiFeO 2 columnar particles were synthesized by heating a mixture of £-Fe 2 O 3 and LiNO 3 at 500°C in air. CeO 2 nanoparticles were prepared from Ce(OH) 3 obtained by a precipitation method. The ¡-LiFeO 2 columnar particles were mixed with the CeO 2 nanoparticles in an aqueous solution and then the mixture of ¡-LiFeO 2 and CeO 2 was heated at 300°C to prepare the ¡-LiFeO 2 coated with CeO 2 nanoparticles. Then the effect of CeO 2 coating on CO 2 absorption ability of ¡-LiFeO 2 was investigated. As a result, coating of CeO 2 on ¡-LiFeO 2 particles was found to suppress the structural phase transition of ¡-LiFeO 2 to ¢¤-LiFeO 2 , although the synthesized ¡-LiFeO 2 underwent a structural phase transition of ¡-LiFeO 2 to ¢¤-LiFeO 2 accompanied by the reaction of ¡-LiFeO 2 with CO 2 in the temperature range of 350 to 425°C. The suppression of the structural phase transition resulted in an increase in CO 2 absorption rate of LiFeO 2 in the temperature range up to 425°C. Thermodynamic analysis revealed that the ¡-LiFeO 2 phase has a lower activation energy for CO 2 diffusion than the ¢¤-LiFeO 2 phase, which results in the enhancement of the CO 2 absorption rate of LiFeO 2 .