Preparation of LiCoO2/Li1.3Al0.3Ti1.7(PO4)3 composite cathode granule for all solid state lithium ion batteries by simple mechanical method
Abstract In this paper, LiCoO 2 /Li 1.3 Al 0.3 Ti 1.7 (PO 4 3 (LATP) composite granule as low cost cathode for all solid state lithium ion batteries was prepared by simple mechanical method using an attrition type mill. LiCoO 2 and LATP were chosen as the active material and the solid state electrolyte, respectively. The mechanical treatment of LiCoO 2 and LATP powders consisting of each nanoparticle provided the homogeneously dispersed composite granule with the granule size of several tens of micrometers. The all solid state lithium ion battery fabricated from this composite granule exhibited the good electrochemical performances compared with that from the LiCoO 2 granule without LATP. The capacity retention of 90% was obtained in the 20 cycles test. The inner dispersed LATP nanoparticles with a high conductivity of lithium ion played a crucial role in operating of the all solid state lithium ion battery.