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

Authors

Gemeng Liang, University of WollongongFollow
Zhibin Wu, University of WollongongFollow
Christophe R. Didier, University of WollongongFollow
Wenchao Zhang, University of WollongongFollow
Jing Cuan, University of Wollongong
Baohua Li
Kuan-Yu Ko
Po Hung
Cheng Lu
Yuanzhen Chen
Grzegorz Leniec
Slawomir Kaczmarek
Bernt Johannessen
Lars Thomsen
Vanessa K. Peterson
Wei Kong Pang, University of WollongongFollow
Zaiping Guo, University of WollongongFollow

RIS ID

142853

Publication Details

Liang, G., Wu, Z., Didier, C., Zhang, W., Cuan, J., Li, B., Ko, K., Hung, P., Lu, C., Chen, Y., Leniec, G., Kaczmarek, S., Johannessen, B., Thomsen, L., Peterson, V., Pang, W. & Guo, Z. (2020). A Long Cycle-Life High-Voltage Spinel Lithium-Ion Battery Electrode Achieved by Site-Selective Doping. Angewandte Chemie - International Edition,

Abstract

© 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim 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 Fd (Formula presented.) 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.