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High-performance Ni-rich Li[Ni0.9–xCo0.1Alx]O2 cathodes via multi-stage microstructural tailoring from hydroxide precursor to the lithiated oxide by Geon-Tae Park; Nam-Yung Park; Tae-Chong Noh; Been Namkoong; Hoon-Hee Ryu; Ji-Yong Shin; Thorsten Beierling; Chong S. Yoon; Yang-Kook Sun is a Engineering article available to read on EtoBox.

What is High-performance Ni-rich Li[Ni0.9–xCo0.1Alx]O2 cathodes via multi-stage microstructural tailoring from hydroxide precursor to the lithiated oxide about?

The recharging capability of Ni-rich layered cathodes deteriorates rapidly upon cycling, mainly from mechanical instability caused by removing a large amount of Li ions from the host structure. Through multistage microstructural tailoring, which refers to optimal engineering of the precursor microstructure and then deliberately over-doping of Al during the lithiation stage to preserve the needle-like morphology of the precursor, we optimize the primary particle morphology of the cathode. It is demonstrated that the chemical and microstructural engineering of a Li[Ni 0.9-x Co 0.1 Al x ]O 2 cathode starting from its precursor stage produces a unique structure that relieves the detrimental mechanical strain and significantly extends the battery life. Excess Al-doped Li[Ni 0.86 Co 0.1 Al 0.04 ]O 2 with the compositional partitioning of Ni produces a highly aligned microstructure in which constituent primary particles are refined to a sub-micrometer scale. Thus, the designed Li[Ni 0.86 Co 0.1 Al 0.04 ]O 2 retains 86.5% of the initial capacity after 2000 cycles and an unprecedented 78.0% even at a severe operation condition of 45 1C. The proposed Li[Ni 0.86 Co 0.1 Al 0.04 ]O 2 represents

Who reads High-performance Ni-rich Li[Ni0.9–xCo0.1Alx]O2 cathodes via multi-stage microstructural tailoring from hydroxide precursor to the lithiated oxide?

Author

Geon-Tae Park; Nam-Yung Park; Tae-Chong Noh; Been Namkoong; Hoon-Hee Ryu; Ji-Yong Shin; Thorsten Beierling; Chong S. Yoon; Yang-Kook Sun

Published

2021

Language

EN

Field

Engineering (Physical Sciences)