The effect of ZnO coating on electrochemical cycling behavior of spinel LiMn2O4 cathode materials at elevated temperature

The structural stability of nanosized ZnO-coated LiMn2O4 was characterized by its cycling behavior at 30 and 55degreesC. The structural degradation and Mn dissolution of the as-prepared and ZnO-coated LiMn2O4 electrodes before and after cycling were studied. The ZnO-coating significantly improved cycling performance at 55degreesC. The reason for the excellent cycling performance of ZnO-coated LiMn2O4 electrode is largely attributed to ZnO's role of HF collection from the electrolyte. (C) 2003 The Electrochemical Society.