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Research Article

Dual-site lattice co-doping strategy regulated crystal-structure and microstructure for enhanced cycling stability of Co-free Ni-rich layered cathode

Lei Liu1,2, Yan Zhao2,3, Guanghui Jiang1,2, Liang Shan1,2, Zelong Yang1,2, Yaoqiang Ma1,2, Yingjie Zhang1,2,3, Qi Meng1,2( ), Peng Dong1,2( )
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
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Graphical Abstract

Mg/W dual-site co-doping regulates the crystal structure and microstructure of cobalt-free nickel-rich LiNi0.9Al0.1O2 cathode material, resulting in excellent cycle life. This work proposes a reasonable design for the next generation of high energy density and economical lithium-ion batteries cathode material.

Abstract

Affected by cobalt (Co) supply bottlenecks and high costs, Co-free Ni-rich layered cathodes are considered the most promising option for economical and sustainable development of lithium-ion batteries (LIBs). Low-cost LiNixAl1−xO2 (x ≥ 0.9) cathode are rarely reported due to their chemo-mechanical instabilities and poor cycle life. Herein, we employ a strategy of Mg/W Li/Ni dual-site co-doping LiNi0.9Al0.1O2 (named as LNA90) cathodes to enhance cycling stability by modifying the crystal structure and forming a center radially aligned microstructure. The Mg/W co-doped LiNi0.9Al0.1O2 cathode (named as LNAMW) exhibits high capacity retention of 94.9% at 1 C and 3.0–4.5 V after 100 cycles with 22.0% increase over the pristine cathode LNA90 and maintains the intact particle morphology. Meanwhile, the cycling performance of LNAMW cathode exceeds that of most reported Ni-rich cathodes (Ni mol% > 80%). Our work offers a straightforward, efficient, and scalable strategy for the future design of Co-free Ni-rich cathodes to facilitate the development of economical lithium-ion batteries.

Keywords

Co-free Ni-rich cathodedual-site co-dopingmicrostructureLiNi0.9Al0.1O2lithium-ion batteries

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Nano Research
Volume 16 Issue 7,
July 2023
Pages 9250-9258
DOI: 10.1007/s12274-023-5479-3
Cite this article:
Liu L, Zhao Y, Jiang G, et al. Dual-site lattice co-doping strategy regulated crystal-structure and microstructure for enhanced cycling stability of Co-free Ni-rich layered cathode. Nano Research, 2023, 16(7): 9250-9258. https://doi.org/10.1007/s12274-023-5479-3
Topics:
Lithium batteries

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Received: 16 October 2022
Revised: 21 December 2022
Accepted: 05 January 2023
Published: 24 May 2023
© Tsinghua University Press 2023
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