Figure 4

LiCoO₂ crystal structure after 60 cycles. (a) The HRTEM image of MLCO. (b) The HRTEM image of MLCO after 60 cycles. (c) The HRTEM image of PLCO after 60 cycles. (d) The XRD patterns of PLCO powders (PLCO-0 cycle), cathode of MLCO (MLCO-60 cycles) and cathode of PLCO (PLCO-60 cycles) after 60 cycles.