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Type: Journal article
Title: A long cycle-life high-voltage spinel lithium-ion battery electrode achieved by site-selective doping
Author: Liang, G.
Wu, Z.
Didier, C.
Zhang, W.
Cuan, J.
Li, B.
Ko, K.-Y.
Hung, P.-Y.
Lu, C.-Z.
Chen, Y.
Leniec, G.
Kaczmarek, S.M.
Johannessen, B.
Thomsen, L.
Peterson, V.K.
Pang, W.K.
Guo, Z.
Citation: Angewandte Chemie International Edition, 2020; 59(26):10594-10602
Publisher: Wiley
Issue Date: 2020
ISSN: 1433-7851
Statement of
Gemeng Liang, Zhibin Wu, Christophe Didier, Wenchao Zhang, Jing Cuan, Baohua Li, Kuan-Yu Ko, Po-Yang Hung, Cheng-Zhang Lu, Yuanzhen Chen, Grzegorz Leniec, Sławomir Maksymilian Kaczmarek, Bernt Johannessen, Lars Thomsen, Vanessa K. Peterson, Wei Kong Pang, and Zaiping Guo
Abstract: Spinel LiNi₀.₅ Mn₁.₅ O₄ (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 3‾ 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 TiNb2 O7 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.
Keywords: High energy density; lithium-ion batteries; long cycle life; site-selective doping; spinel cathodes
Rights: © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/anie.202001454
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