Novel LiNi[sub 1−x]Ti[sub x/2]Mg[sub x/2]O[sub 2] Compounds as Cathode Materials for Safer Lithium-Ion Batteries

Enthalpies of formation of layered LiNixMnxCo1–2xO2 (0 ≤ x ≤ 0.5) compounds as lithium ion battery cathode materials

“…By comparing the patterns, it is observed that by increasing x, the characteristic intensity peaks shift to lower 2h values, indicating a change in the lattice parameters. A distinctive peak splitting between the (006) and (102) as well as between the (108) and (110) pairs, which is a result of the distortion of the oxygen sub-lattice in the hexagonal c direction, indicates the presence of the layered structure [38]. A well pronounced peak splitting can be seen in all XRD patterns.…”

Layered and Spinel Structural Cathodes

“…Besides ZrO 2 and Al 2 O 3 , other coating strategies include AlPO 4 [37], AlF 3 [38] and MgO [36] etc. Moreover doping such as Mg [39,40], Al [40] and Ti/Mg double substitution [41] is also demonstrated as another effective method to improve its cycleability for high voltage application. The addition of a little of the redox-inactive element reduces the capacity fading on cycling, this inert element prevents the complete removal of all the lithium and thus minimizes possibly structural collapse [1].…”

New Developments in Solid Electrolytes for Thin-Film Lithium Batteries

“…The Li deficient defect structure results in gradual collapse of oxide structure during cycling and the specific charge decreases during cycling of the LiNiO 2 electrode (Hirano et al, 1995). In order to improve the performance of the LiNiO 2 structure, many researchers have studied this material using doping elements such as Co, Ti, Mn, Al, Mg, Fe, Zn, Ga, Sb, and S (Chang et al, 2000;Chowdari et al, 2001;Cui et al, 2011;Gao et al, 1998;Nishida et al, 1997;Park et al, 2005;Park and Sun, 2003;Pouillerie et al, 2000;Reimers et al, 1993 (Gao et al, 1998). Therefore, from this point of view, the doped LiNiO 2 can be a good candidate as a cathode material for secondary Li-ion batteries; however, safety is a serious concern.…”