Synthesis, Thermal, and Electrochemical Properties of AlPO[sub 4]-Coated LiNi[sub 0.8]Co[sub 0.1]Mn[sub 0.1]O[sub 2] Cathode Materials for a Li-Ion Cell

Although cathode material has a larger specific capacity than their thermal instability has hindered their use in Li-ion cells. An coating on the cathode, however, noticeably diminished the violent exothermic reaction of the cathode material with the electrolyte, without sacrificing the specific capacity of the bare (188 mAh/g at 4.3 V charge cut off). The results were consistent with the thermal abuse tests using Li-ion cells; the -coated cathode did not exhibit thermal runaway with smoke and explosion, in contrast to the cell containing the bare cathode. In addition, the -coated cathode exhibited a superior cycle-life performance compared to the bare © 2004 The Electrochemical Society. All rights reserved.