Growth mechanisms for spherical mixed hydroxide agglomerates prepared by co-precipitation method: A case of Ni1/3Co1/3Mn1/3(OH)2

Yang, Yue; Xu, Shengming; Xie, Ming; He, Yinghe; Huang, Guoyong; Yang, Yong

doi:10.1016/j.jallcom.2014.08.152

Cited by 80 publications

(56 citation statements)

References 43 publications

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“…The crystal growth morphology depended on the relative growth rate of each crystal plane [28]. In Figure 5a, the XRD data of CoCO 3 under different crystallization times are presented, where all these particles were assumed to be pure phases, indicating hexagonal structures.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of Small-Particle and High-Density Cobalt Carbonate Using a Continuous Carbonate Precipitation Method and Evaluation of Its Growth Mechanism

Guo

Li³

et al. 2019

Materials

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Spherical CoCO3 powder with a small particle size and high density was successfully prepared using a continuous carbonate liquid precipitation method with a raw material of cobalt chloride solution, a precipitant of NH4HCO3, and without a template. The effects of the concentration of ammonium carbonate, process pH, and feeding rate on the tap density and apparent density of cobalt carbonate were investigated. It was found that the apparent and tap density values of 4.4 µm of cobalt carbonate were 1.27 g/cm3 and 1.86 g/cm3, respectively, when the initial concentration of NH4HCO3 solution was 60 g/L, the pH was 7.15–7.20, and the feeding rate of cobalt chloride was 2 L/h. The anisotropic growth process of the crystal lattice plane of CoCO3 under the aforementioned optimal conditions were studied. The results demonstrated that the crystal grew fastest along the (110) facet orientation, which was the dominant growth surface, determining the final morphology of the primary particles. The scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) results demonstrated that the primary particle morphology of the cobalt carbonate was a nanosheet. The unit cell of cobalt carbonate, of a hexagonal structure in the horizontal direction, grew horizontally along the (110) facet orientation, while 20–35 unit cells of the carbon carbonate were stacked along the c-axis in the thickness direction. Finally, the sheet-shaped particles were agglomerated into dense spherical secondary particles, as presented through the crystal re-crystallization model.

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Section: Resultsmentioning

confidence: 99%

“…The grain size calculated using the Scherrer equation (Equation (1)) based on each facet orientation is presented in Figure 5b. These grain sizes directly reflected the growth degree of the corresponding facet orientation groups [28]. In Figure 5b, the growth laws of grain size within the first 2 h of crystallization could not be observed.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Small-Particle and High-Density Cobalt Carbonate Using a Continuous Carbonate Precipitation Method and Evaluation of Its Growth Mechanism

Guo

Li³

et al. 2019

Materials

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“…Yang et al [42] . believed that as the ammonia concentration decreases, the surface of particle becomes smooth.…”

Section: Ni‐rich Ternary Cathode Materialsmentioning

confidence: 99%

Nickel‐Rich Layered Cathode Materials for Lithium‐Ion Batteries

Qiu

Yang

et al. 2021

Chemistry A European J

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Nickel‐rich layered transition metal oxides are considered as promising cathode candidates to construct next‐generation lithium‐ion batteries to satisfy the demands of electrical vehicles, because of the high energy density, low cost, and environment friendliness. However, some problems related to rate capability, structure stability, and safety still hamper their commercial application. In this Review, beginning with the relationships between the physicochemical properties and electrochemical performance, the underlying mechanisms of the capacity/voltage fade and the unstable structure of Ni‐rich cathodes are deeply analyzed. Furthermore, the recent research progress of Ni‐rich oxide cathode materials through element doping, surface modification, and structure tuning are summarized. Finally, this review concludes by discussing new insights to expand the field of Ni‐rich oxides and promote practical applications.

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“…[1][2][3][4] A large number of researchers have made a detailed study of the synthesis mechanism of some nickel-cobalt-manganese hydroxide in ammonia complexes. [5,6] At present, the industrialized method to prepare nickel-rich layered materials is mainly coprecipitation method. However, the morphology, the tap density and the electrochemical performance of these prepared products using this method are significantly dependent on the synthetic conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of complexant concentration in base solution on the structure and electrochemical properties of LiNi0.8Co0.1Mn0.1O2

Wang¹,

Gao²,

Wang³

et al. 2018

Proceedings of the 4th Annual International Conference on Material Engineering and Application (ICMEA 2017)

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Abstract-LiNi 0.8 Co 0.1 Mn 0.1 O 2 powders were synthesized from co-precipitated spherical metal hydroxide, Ni 0.8 Mn 0.1 Co 0.1 (OH) 2 . The effects of the complexant (NH 4 OH) concentration in base solution on the microstructure, crystalline structure and electrochemical properties of the product were studied. The results of scanning electron microscopy showed that the particle morphology was more regular and the particle size tended to increase with improving the concentration of NH 4 OH. The as-prepared material had a good α-NaFeO 2 hexagonal lamellar structure, as confirmed by X-ray diffraction pattern, the sample had the least Li + /Ni 2+ cation disorder when the concentration of NH 4 OH was 1.5M, which contributing to good cycle performance, its initial discharge capacity achieved 198.5 mAh g -1 and the capacity retention rate was 95% after 50 cycles at 0.2C between 2.8 and 4.3V.

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Growth mechanisms for spherical mixed hydroxide agglomerates prepared by co-precipitation method: A case of Ni1/3Co1/3Mn1/3(OH)2

Cited by 80 publications

References 43 publications

Preparation of Small-Particle and High-Density Cobalt Carbonate Using a Continuous Carbonate Precipitation Method and Evaluation of Its Growth Mechanism

Preparation of Small-Particle and High-Density Cobalt Carbonate Using a Continuous Carbonate Precipitation Method and Evaluation of Its Growth Mechanism

Nickel‐Rich Layered Cathode Materials for Lithium‐Ion Batteries

Effects of complexant concentration in base solution on the structure and electrochemical properties of LiNi0.8Co0.1Mn0.1O2

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