Manipulating Layered P2@P3 Integrated Spinel Structure Evolution for High‐Performance Sodium‐Ion Batteries

Structural evolution of the cathode during cycling plays a vital role in the electrochemical performance of sodium‐ion batteries. A strategy based on engineering the crystal structure coupled with chemical substitution led to the design of the layered P2@P3 integrated spinel oxide cathode Na0.5Ni0.1...

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Vydáno v:Angewandte Chemie International Edition Ročník 59; číslo 24; s. 9299 - 9304
Hlavní autoři: Zhu, Yan‐Fang, Xiao, Yao, Hua, Wei‐Bo, Indris, Sylvio, Dou, Shi‐Xue, Guo, Yu‐Guo, Chou, Shu‐Lei
Médium: Journal Article
Jazyk:angličtina
Vydáno: Germany Wiley Subscription Services, Inc 08.06.2020
Vydání:International ed. in English
Témata:
Absorption spectra
Cathodes
Crystal structure
Diffraction patterns
Electrochemical analysis
Electrochemistry
Evolution
layered structures
oxide cathodes
Phase transitions
Rechargeable batteries
Scanning transmission electron microscopy
Sodium
Sodium-ion batteries
Spinel
spinel structure
structural evolution
Transmission electron microscopy
spinel structure
sodium-ion batteries
layered structures
oxide cathodes
structural evolution
ISSN:1433-7851, 1521-3773, 1521-3773
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Shrnutí:Structural evolution of the cathode during cycling plays a vital role in the electrochemical performance of sodium‐ion batteries. A strategy based on engineering the crystal structure coupled with chemical substitution led to the design of the layered P2@P3 integrated spinel oxide cathode Na0.5Ni0.1Co0.15Mn0.65Mg0.1O2, which shows excellent sodium‐ion half/full battery performance. Combined analyses involving scanning transmission electron microscopy with atomic resolution as well as in situ synchrotron‐based X‐ray absorption spectra and in situ synchrotron‐based X‐ray diffraction patterns led to visualization of the inherent layered P2@P3 integrated spinel structure, charge compensation mechanism, structural evolution, and phase transition. This study provides an in‐depth understanding of the structure‐performance relationship in this structure and opens up a novel field based on manipulating structural evolution for the design of high‐performance battery cathodes. Crystal structure engineering and element substitution has led to the stable layered P2@P3 integrated spinel cathode material Na0.5Ni0.1Co0.15Mn0.65Mg0.1O2. The magnesium manipulates its structural evolution to afford reasonable phase ratios and suppresses unfavorable phase transformation as well as relieving the Jahn–Teller distortion, which results in the material showing an excellent performance in a sodium‐ion battery.
Bibliografie:These authors contributed equally to this work.
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ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.201915650