Hydrophobic surface coating against chemical environmental instability for Ni-rich layered oxide cathode materials

Zeng, Lingcai; Shi, Kaixiang; Qiu, Bao; Liang, Haoyan; Li, Junhao; Zhao, Wei; Li, Suli; Zhang, Weigang; Liu, Zhaoping; Liu, Quanbing

doi:10.1016/j.cej.2022.135276

Cited by 36 publications

(17 citation statements)

References 61 publications

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“…The effect of the specific material coating modification is related to the selection of the coating material, but the amount of coating material must also be strictly regulated. [ 63 ]…”

Section: Modification Strategy To Reduce Voltage Decaymentioning

confidence: 99%

Voltage Decay of Li‐Rich Layered Oxides: Mechanism, Modification Strategies, and Perspectives

Zeng

Liang

Qiu

et al. 2023

Adv Funct Materials

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Li-rich layered oxides (LLOs) have been considered as the most promising cathode materials for achieving high energy density Li-ion batteries. However, they suffer from continuous voltage decay during cycling, which seriously shortens the lifespan of the battery in practical applications. This review comprehensively elaborates and summarizes the state-of-the-art of the research in this field. It is started from the proposed mechanism of voltage decay that refers to the phase transition, microscopic defects, and oxygen redox or release. Furthermore, several strategies to mitigate the voltage decay of LLOs from different scales, such as surface modification, elemental doping, regulation of components, control of defect, and morphology design are summarized. Finally, a systematic outlook on the real root of voltage decay is provided, and more importantly, a potential solution to voltage recovery from electrochemistry. Based on this progress, some effective strategies with multiple scales will be feasible to create the conditions for their commercialization in the future.

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“…The effect of the specific material coating modification is related to the selection of the coating material, but the amount of coating material must also be strictly regulated. [ 63 ]…”

Section: Modification Strategy To Reduce Voltage Decaymentioning

confidence: 99%

Voltage Decay of Li‐Rich Layered Oxides: Mechanism, Modification Strategies, and Perspectives

Zeng

Liang

Qiu

et al. 2023

Adv Funct Materials

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“…can inhibit the migration of transition metals, preserving the crystal structural integrity. − For the surface modification, some appropriate surface coating layers (e.g., TiO 2 , Co x B, LiBO 3 , NiCo 2 O 4 , etc.) can act as physical buffered layers to isolate the occurrence of interfacial side reactions to a certain extent. ,− However, such protective coating layers have the limitations of introducing a new interface to inevitably increase surface resistance and disturb ionic transport. Therefore, the coating layer thickness must be appropriately controlled, especially by introducing a newly designed point-to-face contacted nanowelding instead of face-to-face contacted coating .…”

Section: Introductionmentioning

confidence: 99%

Simple Synchronous Dual-Modification Strategy with Zr⁴⁺ Doping and CeO₂ Nanowelding to Stabilize Layered Ni-Rich Cathode Materials

Liu

Yin

Zheng

et al. 2023

ACS Appl. Energy Mater.

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A Ni-rich layered oxide, one promising cathode for lithium-ion batteries (LIBs), exhibits the advantages of low cost and high capacity but suffers from rapid capacity loss due to bulk structural instability and surface side reactions. Herein, a simple synchronous dual-modification strategy with Zr4+ doping and CeO2 nanowelding is proposed to address such issues. Utilizing the migration energy difference of Zr and Ce ions in layered structures, one-step high-temperature sintering of LiNi0.8Co0.1Mn0.1O2 particles with Zr and Ce nitrate distributions enables simultaneous doping of Zr ions in the bulk and CeO2 surface modification. Therein, Zr ions in the bulk occupying the Li sites can improve the Li+ diffusion rate and stabilize the crystal structure, while CeO2 on the surface provides nanowelding between the grain boundaries and resistance to electrolyte erosion. Theoretical calculations and a series of structure/composition characterizations (i.e., neutron scattering, in situ X-ray diffraction, etc.) validated the proposed strategy and its role in stabilizing the Ni-rich cathodes. The synergistic effect of Zr4+ doping and CeO2 nanowelding enables an impressive initial capacity of 187.2 mAh g–1 (2.7–4.3 V vs Li/Li+) with 86.1% retention after 200 cycles at 1 C and rate capabilities of 146.6 and 127.3 mAh g–1 at 5 and 10 C, respectively. Upon increasing the testing temperature to 60 °C, the dual-modified Ni-rich cathode exhibits an initial discharge capacity of 203.5 mAh g–1 with a good retention of 80.8% after 100 cycles at 0.5 C. The present strategy utilizing the migration energy difference of metal ions to achieve synchronous bulk doping and surface modification will offer fresh insights to stabilize layered cathode materials for LIBs, which can be widely used in other kinds of batteries with various cathode materials.

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“…The innovation and development of energy can greatly improve social productivity and people’s living standards . Electric energy, as one of the most important energies for social operation, has been widely used in life, such as light bulbs, portable devices, electric vehicles, computers, etc. − Until now, lithium-ion batteries (LIBs), one of the most significant storage devices of electric energy, hardly meet the growing demand for high-energy-density batteries due to the low energy density of cathode materials. − Thus, exploring and developing a new battery system with high energy density, long life, and low cost to replace Li-ion battery is of great strategic significance. − …”

Section: Introductionmentioning

confidence: 99%

Hollow Co₃S₄ Nanocubes Interconnected with Carbon Nanotubes as Nanoreactors to Accelerate Polysulfide Conversion for High-Performance Lithium–Sulfur Batteries

Pan

et al. 2023

Ind. Eng. Chem. Res.

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Lithium−sulfur batteries (LSBs) with a high energy density of 2600 Wh kg −1 have drawn intensive attention based on the double electron reaction of sulfur. Nevertheless, blocked by the shuttle effect of lithium polysulfides and sluggish sulfur conversion kinetics, LSBs display a small specific capacity and a rapid capacity loss. Herein, we describe a conductive framework and electrocatalyst where numerous carbon nanotubes run through the hollow Co 3 S 4 nanocubes as the sulfur host. The hollow structure can buffer the volume change during the discharge/charge process, while the CNTs link cubes together to facilitate electron transport. The Co 3 S 4 catalyst can not only effectively accelerate the conversion from liquid LiPSs into solid Li 2 S 1/2 but also promote the conversion of Li 2 S 2 into Li 2 S. Based on the DFT theoretical calculation, the Li−S bond of Li 2 S 2 became longer after interaction with Co 3 S 4 , indicating that it is easier to break into Li 2 S. Thus, the Co 3 S 4 /CNTs composite cathode shows a higher initial specific capacity (1252 mAh g −1 ) than the CNT cathode (928 mAh g −1 ) at 0.1C. In addition, it also shows a specific capacity of 440 mAh g −1 after 800 cycles with a decay rate of 0.08% per cycle at 1.0C. This work provides a new perspective for improving the sluggish transformation kinetics, which is conducive to the enhancement of sulfur utilization.

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Hydrophobic surface coating against chemical environmental instability for Ni-rich layered oxide cathode materials

Cited by 36 publications

References 61 publications

Voltage Decay of Li‐Rich Layered Oxides: Mechanism, Modification Strategies, and Perspectives

Voltage Decay of Li‐Rich Layered Oxides: Mechanism, Modification Strategies, and Perspectives

Simple Synchronous Dual-Modification Strategy with Zr⁴⁺ Doping and CeO₂ Nanowelding to Stabilize Layered Ni-Rich Cathode Materials

Hollow Co₃S₄ Nanocubes Interconnected with Carbon Nanotubes as Nanoreactors to Accelerate Polysulfide Conversion for High-Performance Lithium–Sulfur Batteries

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Hydrophobic surface coating against chemical environmental instability for Ni-rich layered oxide cathode materials

Cited by 36 publications

References 61 publications

Voltage Decay of Li‐Rich Layered Oxides: Mechanism, Modification Strategies, and Perspectives

Voltage Decay of Li‐Rich Layered Oxides: Mechanism, Modification Strategies, and Perspectives

Simple Synchronous Dual-Modification Strategy with Zr4+ Doping and CeO2 Nanowelding to Stabilize Layered Ni-Rich Cathode Materials

Hollow Co3S4 Nanocubes Interconnected with Carbon Nanotubes as Nanoreactors to Accelerate Polysulfide Conversion for High-Performance Lithium–Sulfur Batteries

Contact Info

Product

Resources

About

Simple Synchronous Dual-Modification Strategy with Zr⁴⁺ Doping and CeO₂ Nanowelding to Stabilize Layered Ni-Rich Cathode Materials

Hollow Co₃S₄ Nanocubes Interconnected with Carbon Nanotubes as Nanoreactors to Accelerate Polysulfide Conversion for High-Performance Lithium–Sulfur Batteries