Effect of precursor and synthesis temperature on the structural and electrochemical properties of Li(Ni0.5Co0.2Mn0.3)O2

Properties of LiNi0.8Co0.1Mn0.1O2 as a high energy cathode material for lithium-ion batteries

“…Mn is associated with the cycling performance because a part of Mn does not change its valence state during charge and discharge cycles [14,16,17]. Various methods have been applied in the synthesis of Ni-rich layered cathode materials, including solid state [18], sol-gel [19][20][21][22], chloride coprecipitation [23], carbonate co-precipitation [19,24] and hydroxide co-precipitation [15,[25][26][27][28][29][30] methods. A comparison of these synthesis methods shows that the co-precipitation method has many advantages in that it provides a homogeneous precursor with high tap-density, a uniform distribution for the Ni, Co, and Mn atoms, a controllable morphology, improved electrochemical properties and favorable process conditions for mass production.…”

Effects of lithium-active manganese trioxide coating on the structural and electrochemical characteristics of LiNi0.5Co0.2Mn0.3O2 as cathode materials for lithium ion battery

“…All lattice constant ratios of c and a are greater than 4.899, indicating the well-developed layered structure. Nevertheless, the intensity ratio of the (003) and (104) peaks, which represents cation mixing degree between Li + and Ni 2+ in the site of Li + (3a), decreases at low modified pH value [9][10][11][12][28][29][30]. This may be due to the fact that acid solution erodes the interphase of pristine sample during the modified process and leads to the increasing of cation mixing degree [10,12,14,15].…”

“…A class of layer-structured transitional metal oxides LiNi 1-x-y Co x Mn y O 2 has been investigated intensively and applied as key energy storage materials in EV (such as Tesla), due to their higher capacity, less toxicity and lower cost compared with LiCoO 2 [4][5][6][7][8]. In this regard, LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NMC) has attracted much attention [9,10].…”

Multifunctional modification of Li[Ni0.5Co0.2Mn0.3]O2 with NH4VO3 as a high performance cathode material for lithium ion batteries

“…Whereas, to a large extent, cathode materials still need to be improved before further commercialization. The layered lithium transition metal oxide such as Li[Ni 0.5 Co 0.2 Mn 0.3 ]O 2 has drawn much attention and been deemed to be a promising cathode material as a replacement of currently used LiCoO 2 on account of its higher capacity, lower cost, less toxicity, and milder safety characteristics [9][10][11][12][13][14]. However, to meet the requirements of application in electric vehicles, the Li[Ni 0.5 Co 0.2 Mn 0.3 ]O 2 material must be improved in terms of the insufficient solidliquid interfacial stability, cation mixing degree related to the occupation of Li sites by divalent Ni, poor storage capability resulted from high surface pH value, as well as low lithium ion diffusion coefficient.…”