The first cycle characteristics of Li[Ni1/3Co1/3Mn1/3]O2 charged up to 4.7 V

Effect of CO2 on Layered Li1+zNi1-x-yCoxMyO2 (M=Al,Mn) Cathode Materials

“…The oxidation state of Ni is 3+ in NCA composition. On the other hand, it has been previously suggested that the oxidation states of Ni is 2+ in NCM (Ni/Mn molar ratio = 1) composition (4)(5)(6)(7)(8). It is supposed that unstable Ni 3+ is responsible for CO 2 absorption.…”

“…On the other hand, for NCM cathode materials, we consider the most of the excess lithium is incorporated into the crystal, because the lattice parameter linearly changes as the excess lithium content changes. , 11 (29) 7-13 (2008 It has been previously suggested the oxidation states of Ni, Co and Mn are +2, +3 and +4, respectively, in the NCM (Ni/Mn molar ratio = 1) series (4)(5)(6)(7)(8). In our previous work, in order to obtain information for the oxidation states of transition metal in NCM (Ni/Mn molar ratio = 1), Ni, Mn and Co K-edge XANES spectra were measured (10,11).…”

Electrochemical Performances of the Fluorine-Substituted on the 0.3Li2MnO3·0.7LiMn0.60Ni0.25Co0.15O2Cathode Material

“…Figure 2 showed the results of the X-ray diffraction patterns of the Li 2 MnO 3 ·Li[Mn 0.60 Ni 0.25 Co 0.15 ]O 2−x F x (x = 0, 0.025, 0.05, and 0.1) material. The symmetry of the crystal lattice was approximated to be trigonal (R-3m) [13,14,15,16]. The (020) reflection peak at 21 o 2θ was observed, which is characteristic of the integrated monoclinic Li 2 MnO 3 -like component (C2/ m) [17,18,19].…”

Influence of Li source on tap density and high rate cycling performance of spherical Li[Ni1/3Co1/3Mn1/3]O2 for advanced lithium-ion batteries

“…The electrochemical processes involve the redox pair of Ni 2+ /Ni 4+ with twoelectron transfer in the series of these compounds. Among them, Li[Ni 1/3 Co 1/3 Mn 1/3 ]O 2 has been studied extensively as a promising cathode material for lithium-ion batteries as it exhibits much higher capacity, structural stability and enhanced safety [7,8]. However, to replace the commercial LiCoO 2 as a cathode material for advanced lithium ion batteries, which required high energy density and high power density, the tap density and high rate cycling performance of the Li[Ni 1/3 Co 1/3 Mn 1/3 ]O 2 must be further improved [9][10][11][12].…”