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Building High-Rate Nickel-Rich Cathodes by Self-Organization of Structurally Stable Macrovoid

Publication Type : Journal Article

Source : Advanced Science, 2020

Url :

Campus : Amaravati

School : School of Engineering

Department : Electronics and Communication

Verified : No

Year : 2021

Abstract : Nickel-rich materials, as a front-running cathode for lithium-ion batteries suffer from inherent degradation issues such as inter/intragranular cracks and phase transition under the high-current density condition. Although vigorous efforts have mitigated these current issues, the practical applications are not successfully achieved due to the material instability and complex synthesis process. Herein, a structurally stable, macrovoid-containing, nickel-rich material is developed using an affordable, scalable, and one-pot coprecipitation method without using surfactants/etching agents/complex-ion forming agents. The strategically developed macrovoid-induced cathode via a self-organization process exhibits excellent full-cell rate capability, cycle life at discharge rate of 5 C, and structural stability even at the industrial electrode conditions, owing to the fast Li-ion diffusion, the internal macrovoid acting as “buffer zones” for stress relief, and highly stable nanostructure around the void during cycling. This strategy for nickel-rich cathodes can be viable for industries in the preparation of high-performance lithium-ion cells.

Cite this Research Publication : S. Kalluri et. al., Building high-rate nickel-rich cathodes by self-organization of structurally stable macrovoid, Advanced Science, 2020, 7, 1902844. (I.F. = 16.806)

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