Synthesis of spherical LiNi0.8Co0.15Al0.05O2 cathode materials for lithium-ion batteries by a co-oxidation-controlled crystallization method

Liu, Wan Min; Hu, Guoqing; Peng, Zhong Dong; Du, Ke; Cao, Yan Bing; Liu, Qiang

doi:10.1016/j.cclet.2011.01.041

Cited by 38 publications

(16 citation statements)

References 13 publications

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“…[16f, 32b] Therefore, much research in Ni-rich materials has tried to optimize the doping ratio to maximize the stabilize effect with aminimum amount of dopant. [33,44] Studies for Al doping of Ni-rich materials in the past decade are mainly focused on low Al compositions below 5% concentration which hardly reduces the active materials discharge capacity. [30,44,45] However,a s thermal stability and high temperature cycle ability of Ni-rich materials are considered to be more critical problems,recent research has tended to increase the Al ratio to improve the material'ss tability,e ven though it causes slight capacity loss.…”

Section: The Role Of Doping Effectsmentioning

confidence: 99%

“…[33,44] Studies for Al doping of Ni-rich materials in the past decade are mainly focused on low Al compositions below 5% concentration which hardly reduces the active materials discharge capacity. [30,44,45] However,a s thermal stability and high temperature cycle ability of Ni-rich materials are considered to be more critical problems,recent research has tended to increase the Al ratio to improve the material'ss tability,e ven though it causes slight capacity loss. [46] Fori nstance,r ecently our group reported LiNi 0.81 Co 0.1 Al 0.09 O 2 ,w hich realized ah igher rate and better thermal stability than LiNi 1ÀxÀ0.05 Co x Al 0.05 O 2 along with ar eversible capacity of 199 mAh g À1 .…”

Section: The Role Of Doping Effectsmentioning

confidence: 99%

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Nickel‐Rich Layered Lithium Transition‐Metal Oxide for High‐Energy Lithium‐Ion Batteries

et al. 2015

Angew Chem Int Ed

1,616

1,186

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High energy-density lithium-ion batteries are in demand for portable electronic devices and electrical vehicles. Since the energy density of the batteries relies heavily on the cathode material used, major research efforts have been made to develop alternative cathode materials with a higher degree of lithium utilization and specific energy density. In particular, layered, Ni-rich, lithium transition-metal oxides can deliver higher capacity at lower cost than the conventional LiCoO2 . However, for these Ni-rich compounds there are still several problems associated with their cycle life, thermal stability, and safety. Herein the performance enhancement of Ni-rich cathode materials through structure tuning or interface engineering is summarized. The underlying mechanisms and remaining challenges will also be discussed.

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Section: The Role Of Doping Effectsmentioning

confidence: 99%

Section: The Role Of Doping Effectsmentioning

confidence: 99%

Nickel‐Rich Layered Lithium Transition‐Metal Oxide for High‐Energy Lithium‐Ion Batteries

et al. 2015

Angew Chem Int Ed

1,616

1,186

View full text Add to dashboard Cite

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“…However, some of drawbacks seem to restrict its commercialization, which includes: (1) the traditional synthesis method needs further development. The commercial way to prepare LiNi 0.8 Co 0.15 Al 0.05 O 2 is the precursor method in which co-precipitated salts mixed with lithium source was calcinated 4, 5 . This method has two shortcomings.…”

Section: Introductionmentioning

confidence: 99%

LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab

Xiao

Chen

et al. 2017

Sci Rep

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Sub-micron sized LiNi0.8Co0.15Al0.05O2 cathode materials with improved electrochemical performance caused by the reduced cationic disordering in Li slab were synthesized through a solid state reaction routine. In a typical process, spherical precursor powder was prepared by spray drying of a uniform suspension obtained from the ball-milling of the mixture of the starting raw materials. Then the precursor powders were pressed into tablets under different pressures and crushed into powder. The pressing treated powders were finally calcinated under oxygen atmosphere to obtain the target cathode materials. XRD investigation revealed a hexagonal layered structure without impurity phase for all samples and significant increase in the diffraction intensity ratio of I(003)/I(104) was observed. Rietveld refinement further confirmed the reduced cationic disordering in Li slab by such pressing treatment, and the smallest disordering was observed for sample S4 with only 1.3% Ni ions on Li lattice position. The electrochemical testing showed an improvement in electrochemical behavior for those pressing treated samples. The calculation of diffusion coefficients using EIS data showed improved Li diffusion coefficient after pressing treatment. The sample S4 presented a diffusion coefficient of 4.36 × 10−11 cm2·s−1, which is almost 3.5 times the value of untreated sample.

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“…Accordingly, 90% of the distribution lies below the D90, and 10% of the population lies below the D10. NCA-CP samples have a relatively smaller average diameter compared to previous studies that used the continuous co-precipitation method [22][23][24][25], which, as predicted before, could be caused by aluminum ion dissolution at a high pH, which hinders particle growth [17,37]. However, smaller-sized particle have advantages such as a larger surface area and faster Li-ion diffusion compared to particles with a larger size.…”

Section: Nca Samples Characterizationmentioning

confidence: 81%

“…Major advantages of the co-precipitation method are: it does not require sophisticated technology; any raw material can be used, as long as it dissolves easily in the solvent; it has a mild operation condition; and it produces spherical secondary particles with a narrow size distribution. Recent studies on continuous co-precipitation have produced satisfying results [22][23][24][25]. However, extensive control of pH, flow rate, agitation, and temperature has become the main problem in developing the method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery

et al. 2019

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Nickel-rich cathode material, NCA (85:14:1), is successfully synthesized using two different, simple and economical batch methods, i.e., hydroxide co-precipitation (NCA-CP) and the hydroxides solid state reaction method (NCA-SS), followed by heat treatments. Based on the FTIR spectra, all precursor samples exhibit two functional groups of hydroxide and carbonate. The XRD patterns of NCA-CP and NCA-SS show a hexagonal layered structure (space group: R_3m), with no impurities detected. Based on the SEM images, the micro-sized particles exhibit a sphere-like shape with aggregates. The electrochemical performances of the samples were tested in a 18650-type full-cell battery using artificial graphite as the counter anode at the voltage range of 2.7–4.25 V. All samples have similar characteristics and electrochemical performances that are comparable to the commercial NCA battery, despite going through different synthesis routes. In conclusion, the overall results are considered good and have the potential to be adapted for commercialization.

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Synthesis of spherical LiNi0.8Co0.15Al0.05O2 cathode materials for lithium-ion batteries by a co-oxidation-controlled crystallization method

Cited by 38 publications

References 13 publications

Nickel‐Rich Layered Lithium Transition‐Metal Oxide for High‐Energy Lithium‐Ion Batteries

Nickel‐Rich Layered Lithium Transition‐Metal Oxide for High‐Energy Lithium‐Ion Batteries

LiNi0.8Co0.15Al0.05O2: Enhanced Electrochemical Performance From Reduced Cationic Disordering in Li Slab

Synthesis of LiNi0.85Co0.14Al0.01O2 Cathode Material and its Performance in an NCA/Graphite Full-Battery

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