Behavior of lithiated cobalt and nickel oxides in lithiumrechargeable cells

摘要

The electrochemical properties of LiCoO₂ andLiNiO₂ materials in lithium rechargeable cells are presentedand discussed. Cell data indicate that 165-Wh/kg D cells operating over80 cycles can be constructed with both materials. These cells have auseful operating window extending to -20° C. Self-discharge studiesof fully charged cells at 45° C indicate that LiNiO₂ cellslose 1-3% capacity per month while LiCoO₂ cells lose 10-12%capacity per month. There is no electrochemical performance advantage ofone chemistry over the other. However, considering the importantcharacteristic of self-discharge, Li/LiNiO₂ cells havesignificantly reduced self-discharge