Electronic Conductivity Enhancement of LiMnPO4 as a Cathode Electrode for Lithium Rechargeable Battery

Abstract

LiMnPO4 has been intensively interested as potential cathode materials due to better chemical and thermal stability in lithium rechargeable battery. LiMnPO4 cathode materials possess higher operating voltage, but, their rate capability is significantly lower due to its low intrinsic electronic and ionic conductivity. Therefore, electronic conductivity enhancement contained with conductive carbon can prevail over these problems. A solid state reaction was employed to prepare LiMnPO4 containing conductive carbon. XRD patterns of synthesized materials were identified as olivine LiMnPO4. The particle size and morphology of as-prepared sample were characterized by SEM and TEM. The amount of conductive carbon has been found to be correlated to the electrochemical performance test. The electrochemical characterization results for the structure and morphology will be discussed in detailed.