In:
Angewandte Chemie International Edition, Wiley, Vol. 59, No. 26 ( 2020-06-22), p. 10594-10602
Abstract:
Spinel LiNi 0.5 Mn 1.5 O 4 (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 (8 a ) and octahedral (16 c ) sites in the Fd 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 TiNb 2 O 7 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.
Type of Medium:
Online Resource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.202001454
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2011836-3
detail.hit.zdb_id:
123227-7
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