Degradation of Ni-rich cathode materials: A multiple fields coupling with negative feedback process

Huang, Qingrong; Zhang, Xiaodong; Wu, Feng; Chen, Renjie; Li, Li

doi:10.1016/j.ensm.2023.103050

Cited by 4 publications

(2 citation statements)

References 181 publications

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“…During the deep charge−discharge cycle, Ni 2+ is more likely to migrate to the lithium layer, resulting in the irreversible transformation of the material structure from layered to spinel and finally to inactive rock salt, and then generate intergranular cracks. 10 Due to the low Li + conductivity of spinel and rock salt structures and the obstruction of electron transfer caused by intergranular cracks, the polarization of the materials will increase and the capacity will decrease rapidly. In addition, The surface of the materials is sensitive to humidity and is prone to react with air to form surface residual alkalis, such as Li 2 CO 3 and LiOH.…”

Section: ■ Introductionmentioning

confidence: 99%

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B/Al Codoped/Coated Ultra-High Nickel Cobalt-Free Material with Excellent High Voltage/Rate Cycle Stability

Zhang,

Huang,

Tang

et al. 2024

ACS Sustainable Chem. Eng.

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Ultrahigh nickel cobalt-free cathode materials have high energy density and are very promising materials for application in lithium-ion batteries. However, they face severe challenges of overall degradation in the interface/lattice structure stability during charge and discharge, resulting in poor safety and a short cycle life. In this paper, the B/Al codoping/coating is applied to LiNi 0.9 Mn 0.1 O 2 (NM90). The LiAlO 2 /LiBO 2 coating formed in situ by B/Al and surface residual alkali helps to reduce O 2 evolution and restrain side reactions on surface. The B/Al codoping resulting from hightemperature thermal diffusion significantly expands the layer spacing, thus improving the Li + diffusion rate. After 300 cycles, the optimized NM90-1% AB material achieves 86.5% capacity retention (1 C, 2.7− 4.3 V, 25 °C) compared to 68.5% for the pristine NM90 material. Furthermore, its capacity retention can reach 84.7% after 300 cycles at 4.4 V and 5 C, which is much higher than the 58.9% of NM90 material. Even at 10 C, the specific discharge capacity of the NM90-1% AB material can still reach 155.1 mA h/g, but the NM90 material only has 142.8 mA h/g. It is obvious that the B/Al codoped/coated strategy can enhance the interface/lattice structural stability of NM90 material.

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Section: ■ Introductionmentioning

confidence: 99%

“…The increase of nickel content means more Li + insertion and extraction. During the deep charge–discharge cycle, Ni 2+ is more likely to migrate to the lithium layer, resulting in the irreversible transformation of the material structure from layered to spinel and finally to inactive rock salt, and then generate intergranular cracks …”

Section: Introductionmentioning

confidence: 99%

B/Al Codoped/Coated Ultra-High Nickel Cobalt-Free Material with Excellent High Voltage/Rate Cycle Stability

Zhang,

Huang,

Tang

et al. 2024

ACS Sustainable Chem. Eng.

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Systematic Assessment of Mechanisms, Developments, Innovative Solutions, and Future Perspectives of Microplastics and Ecotoxicity – A Review

Manikandan,

Preethi,

Deena

et al. 2024

Advanced Sustainable Systems

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As plastics become more ubiquitous, their impact on the environment and on human health cannot be overlooked. Once generated, micro‐ and nano‐plastics end‐up in the environment, causing widespread health and environmental risks. This is a significant environmental problem given the minuscule sizes of microplastics, and therefore warrants further investigation. This study presents a comprehensive review of the ecotoxicology of microplastics and methods for their degradation and decomposition besides discussing the fate and transport processes, recent progress, emerging strategies, challenges and potential future directions. The authors carefully evaluate the processes through which microplastics cause harm, from molecular interactions in species, to ecological impacts, and end with advances in microplastic biodegradation. Different kinds of microplastics found in the environment include polyethylene, polystyrene, polypropylene, polyvinyl chloride, polycarbonate, polyurethane, polypropylene, and polyethylene terephthalate. Analysis of microbial and enzymatic decomposition provides several swelling mitigation strategies designed to reduce environmental threats. In‐depth investigations of microplastic ecotoxicity and biodegradation are being facilitated by interdisciplinary proposals in the areas of nanotechnology, new analytical methods, and synthetic biology. The extensive study helps understand microplastics comprehensively which in‐turn ensures informed actions to mitigate the challenge of the environmental impact of microplastics for sustainable future.

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Enhanced high-rate and cyclic performance of Co-free and Ni-rich LiNi0.95Mn0.05O2 cathodes by coating electronic/Li+ conductive PANI-PEG layer

He,

Zhang,

Wang

et al. 2024

J Solid State Electrochem

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Degradation of Ni-rich cathode materials: A multiple fields coupling with negative feedback process

Cited by 4 publications

References 181 publications

B/Al Codoped/Coated Ultra-High Nickel Cobalt-Free Material with Excellent High Voltage/Rate Cycle Stability

B/Al Codoped/Coated Ultra-High Nickel Cobalt-Free Material with Excellent High Voltage/Rate Cycle Stability

Systematic Assessment of Mechanisms, Developments, Innovative Solutions, and Future Perspectives of Microplastics and Ecotoxicity – A Review

Enhanced high-rate and cyclic performance of Co-free and Ni-rich LiNi0.95Mn0.05O2 cathodes by coating electronic/Li+ conductive PANI-PEG layer

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