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Nano Research 2023, 16(7): 9250-9258 https://doi.org/10.1007/s12274-023-5479-3
Research Article | Issue | Published: 24 May 2023

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

Show Author's Information 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
Keywords:
microstructure, lithium-ion batteries, Co-free Ni-rich cathode, LiNi0.9Al0.1O2, dual-site co-doping
Topics:
Lithium batteries
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
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Abstract Full text Electronic supplementary material About this article

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.


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Electronic supplementary material
About this article

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

Show Author's information 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

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: microstructure, lithium-ion batteries, Co-free Ni-rich cathode, LiNi0.9Al0.1O2, dual-site co-doping

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Publication history
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Acknowledgements

Publication history

Received: 16 October 2022
Revised: 21 December 2022
Accepted: 05 January 2023
Published: 24 May 2023
Issue date: July 2023

Copyright

© Tsinghua University Press 2023

Acknowledgements

Acknowledgements

The National Natural Science Foundation of China (No. 52004116), the Major Science and Technology Special Program of Yunnan Province (No. 202202AG050003), the Applied Basic Research Plan of Yunnan Province (Nos. 202101AS070020, 202201AT070184, 202101BE070001-016, and 202001AU070039), the High-level Talent Introduction Scientific Research Start Project of KUST (No. 20190015), and the analysis and testing fund of Kunming University of Technology (No. 2021M20202202144) are gratefully acknowledged.

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