Structural, electrochemical and thermal properties of LiNi0.8−xCo0.2CexO2 as cathode materials for lithium ion batteries

Comprehensive Study of Ti and Ta Co‐Doping in Ni‐Rich Cathode Material LiNi0.8Mn0.1Co0.1O2 Towards Improving the Electrochemical Performance

“…The pristine LNMC‐P cathodes showed steeper plateaus compared to all doped cathodes (LNMC‐55, LNMC‐11, LNMC−Ti‐1, and LNMC−Ta‐1), indicating sudden phase transition. In comparison with all as‐prepared cathodes, the LNMC‐55 cathode exhibits better discharge capacity as more lithium will be intercalated at a similar cutoff voltage after Ti and Ta co‐doping [56] . Figure 5b shows that all doped samples exhibit better rate performances than pristine sample, especially at high current densities.…”

“…In comparison with all as-prepared cathodes, the LNMC-55 cathode exhibits better discharge capacity as more lithium will be intercalated at a similar cutoff voltage after Ti and Ta co-doping. [56] Figure 5b shows that all doped samples exhibit better rate performances than pristine sample, especially at high current densities. At 0.1 C, the pristine sample displays an average discharge capacity of 201.2 mAh g À 1 ; at 2 C, the discharge capacity is 45.9 mAh g À 1 with a capacity retention of 22.8 %.…”

Tartaric acid-assisted sol–gel synthesis of LiNi0.5Co0.5−Ti O2 (0 ⩽x⩽ 0.5) as cathode materials for lithium-ion batteries

“…Because the coating layer can only suppress the whole particle expansion/shrinkage but can not avoid the phase transitions. To make intrinsic progress with structural and thermal stabilities, various metal elements, such as Al [14,15], Ca [16], Ce [17], Ga [18], Mg [19], Mn [20], Sn [21], Sr [22], Ti [23], Y [24], Zn [25], Zr [26], were used to dope and improve the electrochemical properties of LiNi 1Àx [33] have been reported as excellent cathode materials with improved cycling performance and enhanced thermal stability after Ti doping. However, it is difficult to find the studies about the LiNiO 2 -based layered compounds with full series of Ti doping.…”

Effects of Mg doping on the electrochemical properties of LiNi0.8Co0.2O2 cathode material

“…So far, elements such as Al [17], Ga [18], Zr [19] and Ce [20] have been reported for partial substitution of Ni or Co to further enhance the electrochemical performance of the cathode materials. In particular, Mg has been known to be a good candidate as a dopant since it can increase the electronic conductivity of LiCoO 2 , which was reported by Carewska et al [21].…”