Enhanced initial coulombic efficiency of Li1.14Ni0.16Co0.08Mn0.57O2 cathode materials with superior performance for lithium-ion batteries

Li, F.; Sun, Yan-Yun; Yao, Zhiheng; Cao, Jun; Wang, Yong-Long; Ye, S.H.

doi:10.1016/j.electacta.2015.08.163

Cited by 30 publications

(8 citation statements)

References 54 publications

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“…According to the discussion above, the conspicuous planar gliding of charged NCM83 should be attributed to its rich oxygen deficiency, which can result from the anaerobic environment caused by molten salt synthesis. 41 To further verify the influence of oxygen vacancies on gliding experimentally, we utilized solid-state synthesis in the oxygen-rich atmosphere to suppress lattice oxygen escaping and obtained the O-NCM83 sample. It can be seen that O-NCM83 exhibits a similar particle size distribution with NCM83, and the average particle sizes of O-NCM83 and NCM83 are 2.28 μm and 2.35 μm, respectively (Figure S4).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Kinetic Origin of Planar Gliding in Single-Crystalline Ni-Rich Cathodes

et al. 2022

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Single-crystalline Ni-rich cathodes with high capacity have drawn much attention for mitigating cycling and safety crisis of their polycrystalline analogues. However, planar gliding and intragranular cracking tend to occur in single crystals with cycling, which undermine cathode integrity and therefore cause capacity degradation. Herein, we intensively investigate the origin and evolution of the gliding phenomenon in single-crystalline Ni-rich cathodes. Discrete or continuous gliding forms are revealed with new surface exposure including the gliding plane (003) and reconstructed (−108) under surface energy drive. It is also demonstrated that the gliding process is the in-plane migration of transition metal ions, and reducing oxygen vacancies will increase the migration energy barrier by which gliding and microcracking can be restrained. The designed cathode with less oxygen deficiency exhibits outstanding cycling performance with an 80.8% capacity retention after 1000 cycles in pouch cells. Our findings provide an insight into the relationship between defect control and chemomechanical properties of single-crystalline Ni-rich cathodes.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Kinetic Origin of Planar Gliding in Single-Crystalline Ni-Rich Cathodes

et al. 2022

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“…Cation doping into the lattice of layered oxides is an effective way to increase the structural stability. − For instance, it was found that Mg ions can act as pillar ions to inhibit the interslab collapse, and thus improve the structural stability of Ni-rich layered oxides. Similar to Mg ions, Na ions with relatively large radiuses may also act as pillar ions to stabilize the Ni-rich layered oxides.…”

Section: Introductionmentioning

confidence: 99%

Na-Doped LiNi_0.8Co_0.15Al_0.05O₂ with Excellent Stability of Both Capacity and Potential as Cathode Materials for Li-Ion Batteries

Wang

Sun

Liu

et al. 2018

ACS Appl. Energy Mater.

125

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Nickel-rich layered oxides with their large reversible capacity are considered to be some of the most promising cathode materials for high-energy Li-ion batteries. However, the fast decay of capacity and potential of Ni-rich layered oxides occurs unavoidably during long-term cycling, which is harmful to the stable output of energy density of Li-ion batteries. In this work, Na-ion doping is introduced into LiNi 0.8 Co 0.15 Al 0.05 O 2 in order to stabilize both the capacity and potential. In this work, 1 wt % Na ions are doped into LiNi 0.8 Co 0.15 Al 0.05 O 2 with a gradient distribution from the surface to the bulk. In addition, the morphology of the spherical oxide particle is not damaged by Na-ion doping. Comparing with the pristine sample, Na-doped LiNi 0.8 Co 0.15 Al 0.05 O 2 presents lower potential polarization, higher initial Coulombic efficiency, and better rate capability. In particular, the cycle stability of both potential and capacity is greatly enhanced for the Na-doped sample, which is very important for stabilizing the energy density of cathode. In addition, the integrated spherical morphology of the Na-doped sample particle is retained even after long-term cycling, which is attributed to the pillaring effect of Na ions with large radiuses.

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“…It is noteworthy that porous, especially mesoporous, electrode materials may significantly improve power rate during electrochemical process because of the large surface area, abundant migration channels for Li + , and enhanced accessibility to anchor each functional chemical on the surface. , Tremendous efforts have been made to prepare porous Li-rich materials by various template, such as carbon felt, graphene, and aerogel . In addition, NaCl molten-salt method and polymer-thermolysis method have also been utilized. Aforementioned measures are consumptive and difficult to realize for industrialization.…”

Section: Introductionmentioning

confidence: 99%

“…24,25 Tremendous efforts have been made to prepare porous Lirich materials by various template, such as carbon felt, 26 graphene, 27 and aerogel. 28 In addition, NaCl molten-salt method 29 and polymer-thermolysis method 30 have also been utilized. Aforementioned measures are consumptive and difficult to realize for industrialization.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Mesoporous Lithium-Rich Li[Li_0.2Ni_0.2Mn_0.6]O₂ Cathode Material Synthesized via Ice Templating for Lithium-Ion Battery

Liu

Bai

et al. 2016

ACS Appl. Mater. Interfaces

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Tuning hierarchical micro/nanostructure of electrode materials is a sought-after means to reinforce their electrochemical performance in the energy storage field. Herein, we introduce a type of hierarchical mesoporous Li[Li0.2Ni0.2Mn0.6]O2 microsphere composed of nanoparticles synthesized via an ice templating combined coprecipitation strategy. It is a low-cost, eco-friendly, and easily operated method using ice as a template to control material with homogeneous morphology and rich porous channels. The as-prepared material exhibits remarkably enhanced electrochemical performances with higher capacity, more excellent cycling stability and more superior rate property, compared with the sample prepared by conventional coprecipitation method. It has satisfactory initial discharge capacities of 280.1 mAh g(-1) at 0.1 C, 207.1 mAh g(-1) at 2 C, and 152.4 mAh g(-1) at 5 C, as well as good cycle performance. The enhanced electrochemical performance can be ascribed to the stable hierarchical microsized structure and the improved lithium-ion diffusion kinetics from the highly porous structure.

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Enhanced initial coulombic efficiency of Li1.14Ni0.16Co0.08Mn0.57O2 cathode materials with superior performance for lithium-ion batteries

Cited by 30 publications

References 54 publications

Kinetic Origin of Planar Gliding in Single-Crystalline Ni-Rich Cathodes

Kinetic Origin of Planar Gliding in Single-Crystalline Ni-Rich Cathodes

Na-Doped LiNi_0.8Co_0.15Al_0.05O₂ with Excellent Stability of Both Capacity and Potential as Cathode Materials for Li-Ion Batteries

Hierarchical Mesoporous Lithium-Rich Li[Li_0.2Ni_0.2Mn_0.6]O₂ Cathode Material Synthesized via Ice Templating for Lithium-Ion Battery

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Enhanced initial coulombic efficiency of Li1.14Ni0.16Co0.08Mn0.57O2 cathode materials with superior performance for lithium-ion batteries

Cited by 30 publications

References 54 publications

Kinetic Origin of Planar Gliding in Single-Crystalline Ni-Rich Cathodes

Kinetic Origin of Planar Gliding in Single-Crystalline Ni-Rich Cathodes

Na-Doped LiNi0.8Co0.15Al0.05O2 with Excellent Stability of Both Capacity and Potential as Cathode Materials for Li-Ion Batteries

Hierarchical Mesoporous Lithium-Rich Li[Li0.2Ni0.2Mn0.6]O2 Cathode Material Synthesized via Ice Templating for Lithium-Ion Battery

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Product

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Na-Doped LiNi_0.8Co_0.15Al_0.05O₂ with Excellent Stability of Both Capacity and Potential as Cathode Materials for Li-Ion Batteries

Hierarchical Mesoporous Lithium-Rich Li[Li_0.2Ni_0.2Mn_0.6]O₂ Cathode Material Synthesized via Ice Templating for Lithium-Ion Battery