Cation Intercalation in Manganese Oxide Nanosheets: Effects on Lithium and Sodium Storage

The rapid development of advanced energy‐storage devices requires significant improvements of the electrode performance and a detailed understanding of the fundamental energy‐storage processes. In this work, the self‐assembly of two‐dimensional manganese oxide nanosheets with various metal cations i...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2016-08, Vol.55 (35), p.10448-10452
Main Authors: Lu, Ke, Hu, Ziyu, Xiang, Zhonghua, Ma, Jizhen, Song, Bin, Zhang, Jintao, Ma, Houyi
Format: Article
Language:English
Subjects:
Cathodes
Cations
Cycles
Design
Devices
Efficiency
electrochemistry
Electrode materials
Electrodes
Energy storage
Intercalation
Interlayers
Ions
Lithium
Manganese
manganese oxide
Metals
Nanosheets
Sandwich structures
Self-assembly
Sodium
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Summary:The rapid development of advanced energy‐storage devices requires significant improvements of the electrode performance and a detailed understanding of the fundamental energy‐storage processes. In this work, the self‐assembly of two‐dimensional manganese oxide nanosheets with various metal cations is introduced as a general and effective method for the incorporation of different guest cations and the formation of sandwich structures with tunable interlayer distances, leading to the formation of 3D MxMnO2 (M=Li, Na, K, Co, and Mg) cathodes. For sodium and lithium storage, these electrode materials exhibited different capacities and cycling stabilities. The efficiency of the storage process is influenced not only by the interlayer spacing but also by the interaction between the host cations and shutter ions, confirming the crucial role of the cations. These results provide promising ideas for the rational design of advanced electrodes for Li and Na storage. Spoilt for choice: A series of three‐dimensional MxMnO2 (M=Li, Na, K, Mg, or Co) cathodes with a sandwich structure were obtained by the self‐assembly of manganese oxide nanosheets with these metal cations. The intercalated cations influence the capacity and cycling stability of these cathodes for lithium and sodium storage.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201605102