Manipulating Layered P2@P3 Integrated Spinel Structure Evolution for High‐Performance Sodium‐Ion Batteries. (31st March 2020)

• Record Type: Journal Article
• Authors: Zhu, Yan‐Fang; Xiao, Yao; Hua, Wei‐Bo; Indris, Sylvio; Dou, Shi‐Xue; Guo, Yu‐Guo; Chou, Shu‐Lei
• Is Part Of: Angewandte Chemie. Volume 132:Number 24(2020)
• Page Start: 9385
• Page End: 9390
• Publication Date: 2020-03-31
• Subjects: Schichtstrukturen -- Natrium-Ionen-Batterien -- Oxidkathoden -- Spinellstrukturen -- Strukturelle Entwicklung; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201915650
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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 Na0.5 Ni0.1 Co0.15 Mn0.65 Mg0.1 O2, 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. Abstract : Kristallstruktur‐Engineering undElementsubstitution führen zu dem schichtförmigen P2@P3‐integriertenSpinell‐Kathodenmaterial Na0.5 Ni0.1 Co0.15 Mn0.65 Mg0.1 O2 . Die Einführung von Magnesium führt zu geeigneten Phasenverhältnissen, unterdrückt ungünstige Phasenumwandlungen und verringert die Jahn‐Teller‐Verzerrung. Das Material zeigt eine exzellente Leistung in einer Natrium‐Ionen‐Batterie.