Stable layered Ni-rich LiNi0.9Co0.07Al0.03O2 microspheres assembled with nanoparticles as high-performance cathode materials for lithium-ion batteries

Zhou, Pengfei; Meng, Huanju; Zhang, Zhen; Chen, Chengcheng; Lu, Yanying; Cao, Jun; Cheng, Fangyi; Chen, Jun

doi:10.1039/c6ta09921a

Cited by 175 publications

(81 citation statements)

References 49 publications

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“…As can be seen from the figure, all samples show three pairs of reduction and oxidation peaks, which are caused by the complex three phase transitions of hexagonal phase to monoclinic phase (H1-M), monoclinic phase to hexagonal phase (M-H2), and hexagonal phase to hexagonal phase (H2-H3) during the extraction and insertion of lithium ion. Such findings are consistent with the earlier reports from Xie, H 19, 25 and Zhou, P 26 . In the H1-M redox peaks, the sample of redox voltage gap is 0.1779 V, 0.1564 V, 0.1179 and 0.1485 V, respectively.…”

Section: Resultssupporting

confidence: 94%

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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Section: Resultssupporting

confidence: 94%

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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“…The diffusion coefficient of Li + (D Li ) could be determined by the GITT technique. This technique has been considered to be a reliable method to determine the D Li and is applied for many electrode materials, such as LiV 3 O 8, [34] LiNi 0.9 Co 0.07 Al 0.03 O 2 , [35] Li 3 S b , [36] and LiFePO 4.…”

Section: Resultsmentioning

confidence: 99%

Fluorinated Nanographite as a Cathode Material for Lithium Primary Batteries

Wang

et al. 2019

ChemElectroChem

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Lithium/fluorinated carbon (Li/CFx) batteries face the problems of low rate performance and initial voltage delay. Herein, we propose a novel type of fluorinated nanographite as a cathode material for Li/CFx batteries through the direct fluorination of nanographite. The structure of fluorinated nanographite, including crystalline phase, particle size, fluorine content, and the properties of C−F bonding, strongly depend on the fluorination temperature. The fluorinated nanographite prepared at 450 °C (FG‐450) shows the highest specific capacity, 837.4 mAh g−1 at 10 mA g−1, along with a discharge plateau of 2.54 V, responding to an energy density of 2004.5 Wh kg−1. The highlights of the fluorinated nanographite are to deliver high rate performance and overcome the initial voltage delay. FG‐450 can be discharged at a high rate of about 3.6 C, delivering a high power density of 5460 W kg−1 with a remaining energy density of 1030.5 Wh kg−1. The good electrochemical performance of the FG‐450 sample is ascribed to the combined effect of its nanoparticle size, large specific surface area, and continuous stacking porosity.

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“…High-energy density and high-power density are the two most important factors in a commercial lithium-ion battery. For the cathode materials, compared to the widely used LiFePO 4 , LiMn 2 O 4 , and LiNi 1/3 Co 1/3 Mn 1/3 O 2 [1][2][3][4], the layered nickel-rich materials with higher capacity (170-200 mAh g -1 ) [5][6][7][8], have attracted more and more attention.…”

Section: Introductionmentioning

confidence: 99%

Facilitating Lithium-Ion Diffusion in Layered Cathode Materials by Introducing Li ⁺ /Ni ²⁺ Antisite Defects for High-Rate Li-Ion Batteries

et al. 2019

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Li+/Ni2+ antisite defects mainly resulting from their similar ionic radii in the layered nickel-rich cathode materials belong to one of cation disordering scenarios. They are commonly considered harmful to the electrochemical properties, so a minimum degree of cation disordering is usually desired. However, this study indicates that LiNi0.8Co0.15Al0.05O2 as the key material for Tesla batteries possesses the highest rate capability when there is a minor degree (2.3%) of Li+/Ni2+ antisite defects existing in its layered structure. By combining a theoretical calculation, the improvement mechanism is attributed to two effects to decrease the activation barrier for lithium migration: (1) the anchoring of a low fraction of high-valence Ni2+ ions in the Li slab pushes uphill the nearest Li+ ions and (2) the same fraction of low-valence Li+ ions in the Ni slab weakens the repulsive interaction to the Li+ ions at the saddle point.

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Stable layered Ni-rich LiNi_0.9Co_0.07Al_0.03O₂ microspheres assembled with nanoparticles as high-performance cathode materials for lithium-ion batteries

Abstract: Stable layered LiNi0.9Co0.07Al0.03O2 microspheres show large discharge capacity and good cycling performance as cathode for lithium ion batteries.

Cited by 175 publications

References 49 publications

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

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

Fluorinated Nanographite as a Cathode Material for Lithium Primary Batteries

Facilitating Lithium-Ion Diffusion in Layered Cathode Materials by Introducing Li ⁺ /Ni ²⁺ Antisite Defects for High-Rate Li-Ion Batteries

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Stable layered Ni-rich LiNi0.9Co0.07Al0.03O2 microspheres assembled with nanoparticles as high-performance cathode materials for lithium-ion batteries

Abstract: Stable layered LiNi0.9Co0.07Al0.03O2 microspheres show large discharge capacity and good cycling performance as cathode for lithium ion batteries.

Cited by 175 publications

References 49 publications

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

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

Fluorinated Nanographite as a Cathode Material for Lithium Primary Batteries

Facilitating Lithium-Ion Diffusion in Layered Cathode Materials by Introducing Li + /Ni 2+ Antisite Defects for High-Rate Li-Ion Batteries

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Product

Resources

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Stable layered Ni-rich LiNi_0.9Co_0.07Al_0.03O₂ microspheres assembled with nanoparticles as high-performance cathode materials for lithium-ion batteries

Facilitating Lithium-Ion Diffusion in Layered Cathode Materials by Introducing Li ⁺ /Ni ²⁺ Antisite Defects for High-Rate Li-Ion Batteries