Volume 132, Issue 26 pp. 10681-10689
Forschungsartikel

A Long Cycle-Life High-Voltage Spinel Lithium-Ion Battery Electrode Achieved by Site-Selective Doping

Gemeng Liang

Gemeng Liang

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

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Zhibin Wu

Zhibin Wu

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

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Dr. Christophe Didier

Dr. Christophe Didier

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organization, Sydney, NSW, Australia

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Dr. Wenchao Zhang

Dr. Wenchao Zhang

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

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Dr. Jing Cuan

Dr. Jing Cuan

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

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Prof. Baohua Li

Prof. Baohua Li

Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055 P. R. China

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Kuan-Yu Ko

Kuan-Yu Ko

Industrial Technology Research Institute, Hsinchu, Taiwan) (China

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Po-Yang Hung

Po-Yang Hung

Industrial Technology Research Institute, Hsinchu, Taiwan) (China

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Dr. Cheng-Zhang Lu

Dr. Cheng-Zhang Lu

Industrial Technology Research Institute, Hsinchu, Taiwan) (China

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Dr. Yuanzhen Chen

Dr. Yuanzhen Chen

School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049 P. R. China

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Dr. Grzegorz Leniec

Dr. Grzegorz Leniec

Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland

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Dr. Sławomir Maksymilian Kaczmarek

Dr. Sławomir Maksymilian Kaczmarek

Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, Al. Piastów, 17, 70-310 Szczecin, Poland

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Dr. Bernt Johannessen

Dr. Bernt Johannessen

Australian Synchrotron, Australian Nuclear Science and Technology Organization, 800 Blackburn Road, Clayton, Victoria, 3168 Australia

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Dr. Lars Thomsen

Dr. Lars Thomsen

Australian Synchrotron, Australian Nuclear Science and Technology Organization, 800 Blackburn Road, Clayton, Victoria, 3168 Australia

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Dr. Vanessa K. Peterson

Dr. Vanessa K. Peterson

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

Australian Centre for Neutron Scattering, Australian Nuclear Science and Technology Organization, Sydney, NSW, Australia

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Dr. Wei Kong Pang

Corresponding Author

Dr. Wei Kong Pang

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

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Prof. Zaiping Guo

Corresponding Author

Prof. Zaiping Guo

Faculty of Engineering, Institute for Superconducting & Electronic Materials, University of Wollongong, Wollongong, NSW, Australia

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First published: 23 March 2020
Citations: 37

Abstract

Spinel LiNi0.5Mn1.5O4 (LNMO) is a promising cathode candidate for the next-generation high energy-density lithium-ion batteries (LIBs). Unfortunately, the application of LNMO is hindered by its poor cycle stability. Now, site-selectively doped LNMO electrode is prepared with exceptional durability. In this work, Mg is selectively doped onto both tetrahedral (8a) and octahedral (16c) sites in the Fdurn:x-wiley:00448249:media:ange202001454:ange202001454-math-0001 m structure. This site-selective doping not only suppresses unfavorable two-phase reactions and stabilizes the LNMO structure against structural deformation, but also mitigates the dissolution of Mn during cycling. Mg-doped LNMOs exhibit extraordinarily stable electrochemical performance in both half-cells and prototype full-batteries with novel TiNb2O7 counter-electrodes. This work pioneers an atomic-doping engineering strategy for electrode materials that could be extended to other energy materials to create high-performance devices.

Conflict of interest

The authors declare no conflict of interest.

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