Effect of Cr doping on the structural, electrochemical properties of Li[Li0.2Ni0.2−x/2Mn0.6−x/2Crx]O2 (x=0, 0.02, 0.04, 0.06, 0.08) as cathode materials for lithium secondary batteries

Synthesis, structural and electrochemical properties of LiNi0.79Co0.1Mn0.1Cr0.01O2 via fast co-precipitation

“…Great differences in the capacity and coulombic efficiency are observed in the sample b, which is about 238.08, 209.92 mAh g −1 , and 88.2%, respectively. It is noted that the initial charge capacity decreases, and the initial discharge capacity and coulombic efficiency improve after Cr substitution; the results are consistent with Li's study [27]. One of the reasons is that Cr substitution could increase the amount of electrochemical active component in doped materials.…”

Li-rich layered composite Li[Li0.2Ni0.2Mn0.6]O2 synthesized by a novel approach as cathode material for lithium ion battery

“…It is also confirmed that a well-ordered structure is obtained in the composite according to the low (I 006 þ I 102 )/I 101 ratio of 0.3465. Thus, the composite structure may benefit the reversible insertion/extraction of lithium ion through the two-dimension channel built by MO 6 [21,22], leading to the enhancement of cycling performance. Fig.…”

Synthesis and electrochemical performance of micro-sized Li-rich layered cathode material for Lithium-ion batteries

“…In the initial anodic processes of the N-LR-NCM and C-LR-NCM, there are two oxidation peaks at about 4.1 V and 4.6 V. The 4.1 V peak is due to the oxidation process of Ni 2+ /Co 3+ to higher oxidation states. While, the 4.6 V peak originates from the removal of superfluous lithium from the transition-metal layer along with simultaneous oxygen evolution [37,38]. Besides the two oxidation peaks like the samples before treatment in the initial anodic process, one additional small oxidation peak appears at about 2.95 V for the T-LR-NCM, which is attributed to a surface spinel contribution [25,39].…”