TY  - JOUR
AU  - Gellert, Michael
AU  - Dashjav, Enkhetsetseg
AU  - Grüner, Daniel
AU  - Ma, Qianli
AU  - Tietz, Frank
TI  - Compatibility study of oxide and olivine cathode materials with lithium aluminum titanium phosphate
JO  - Ionics
VL  - 24
IS  - 4
SN  - 1862-0760
CY  - Berlin
PB  - Springer
M1  - FZJ-2018-04622
SP  - 1001 - 1006
PY  - 2018
AB  - The compatibility of the solid electrolyte Li1.5Al0.5Ti1.5(PO4)3 (LATP) with the cathode materials LiCoO2, LiMn2O4, LiCoPO4, LiFePO4, and LiMn0.5Fe0.5PO4 was investigated in a co-sintering study. Mixtures of LATP and the different cathode materials were sintered at various temperatures and subsequently analyzed by thermal analysis, X-ray diffraction, and electron microscopy. Oxide cathode materials display a rapid decomposition reaction with the electrolyte material even at temperatures as low as 500 °C, while olivine cathode materials are much more stable. The oxide cathode materials tend to decompose to lithium-free compounds, leaving lithium to form Li3PO4 and other metal phosphates. In contrast, the olivine cathode materials decompose to mixed phosphates, which can, in part, still be electrochemically active. Among the olivine cathode materials, LiFePO4 demonstrated the most promising results. No secondary phases were detected by X-ray diffraction after sintering a LATP/LiFePO4 mixture at temperatures as high as 700 °C. Electron microscopy revealed a small secondary phase probably consisting of Li2FeTi(PO4)3, which is ionically conductive and should be electrochemically active as well.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000428070800005
DO  - DOI:10.1007/s11581-017-2276-6
UR  - https://juser.fz-juelich.de/record/850871
ER  -