Preparation and characterization of LiNi 0.8 Co 0.15 Al 0.05 O 2 with high cycling stability by using AlO 2 - as Al source

A Fast Metals Recovery Method for the Synthesis of Lithium Nickel Cobalt Aluminum Oxide Material from Cathode Waste

“…A higher intensity ratio of the I 003 /I 104 peak results in lower levels of undesired cation disorder. Based on Table 2, all samples have I 003 /I 004 greater than 1.2, indicating a low degree of cation mixing [44,55,59,60]. The ratio of c/a represents the degree of crystallinity and stability of the RNCA material [59,61].…”

Solvothermal Synthesis of a Hollow Micro-Sphere LiFePO4/C Composite with a Porous Interior Structure as a Cathode Material for Lithium Ion Batteries

“…The distinct improvement in electrochemical performance can be attributed to their successfully designed structural features: (1) the hollow micro-spheres with porous interior structure to prevent structural collapse in long-term cycling by supplying enough space for the change of volume in the extraction and insertion of Li + ions; (2) the nanoparticles comprising the microspheres to promote good electron transfer and enhance the accessibility of lithium ions [9]; and (3) the porous hollow microspherical structure also provides good contact with electrolyte which can flood the interior of the hollow spheres [43]. Even LFP-B, synthesized in the absence of CTAB surfactant, also displays an excellent electrochemical performance, better than that of pristine LiFePO 4 synthesized via the hydrothermal route in our previous work, and the electrical performance presented in this work is compared with other known hollow spherical LiFePO 4 composites reported in the literatures, as shown in Table 1.…”

A Cation Chelation and Reassembly Route to Synthesize a P2‐type Na0.67Ni0.26Mn0.67Mg0.07O2 Cathode Material for High‐performance Sodium Storage

“…In particular, the solubility product constant of Al 3 + is much smaller than those of Ni 2 + and Co 2 + so that it is hard to use the co-precipitation to prepare LiNi 0.8 Co 0.15 Al 0.05 O 2 precursor with a stoichiometric and uniform composition distribution. [24] Zhang et al [21] developed a Al-compensation method to fabricate stoichiometric LiNi 0.8 Co 0.15 Al 0.05 O 2 precursor, in which they firstly introduced part of Al using a hydroxide co-precipitation method to fabricate Ni 0.80 Co 0.15 Al x (OH) 0.95 × 2 + 3x (x � 0.05), and then they introduce another part of Al by mixing the above precursor with an extra (0.05-x) mole ratio of Al(OH) 3 . Similarly, the above Na 2/3 Ni 1/3-x Mg x Mn 2/3 O 2 cathode materials are usually realized through selective substitution of Mg 2 + for Ni 2 + ions in the Na 2/3 Ni 1/2 Mn 1/2 O 2 , yet the solubility product constants of Mg(OH) 2 (K sp = 5.61 × 10 À 12 ) is also much lower than those of Ni(OH) 2 (K sp = 5.48 × 10 À 16 ), [25] so it is difficult to obtain precursors with uniform element distribution and stoichiometry using the co-precipitation process.…”