Chenglin Hu, Xiangyun Yuan, Yuping Wu, and Teunis van Ree
Two electroactive structures of lithium cobalt oxide exist: layered and spinel. Usually, the former is preferred as an electrode material, since the latter is not stable during cycling unless there are major modifications. Layered LiCoO2 is widely used as a positive electrode material in lithium-ion batteries and can also be used as a positive electrode material in aqueous rechargeable lithium batteries (ARLBs).
The layered structure and X-ray diffraction (XRD) patterns of LiCoO2 are shown in Figure 2.1. Research on this stable compound dates back to 1980. Its structure is like α-NaFeO2 based on a closely packed network of oxygen atoms with Li+ and Co3+ ions ...