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231225s2020 xx |||||o 00| ||eng c |
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|a 10.1002/adma.201906348
|2 doi
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|a pubmed24n1021.xml
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|a (DE-627)NLM306322315
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|a (NLM)32037671
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|a DE-627
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|e rakwb
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|a eng
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| 100 |
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|a Zhang, Jian
|e verfasserin
|4 aut
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|a A Novel NASICON-Type Na4 MnCr(PO4 )3 Demonstrating the Energy Density Record of Phosphate Cathodes for Sodium-Ion Batteries
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|c 2020
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 30.09.2020
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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|a Sodium-ion batteries (SIBs) have attracted incremental attention as a promising candidate for grid-scale energy-storage applications. To meet practical requirements, searching for new cathode materials with high energy density is of great importance. Herein, a novel Na superionic conductor (NASICON)-type Na4 MnCr(PO4 )3 is developed as a high-energy cathode for SIBs. The Na4 MnCr(PO4 )3 nanoparticles homogeneously embedded in a carbon matrix can present an extraordinary reversible capacity of 160.5 mA h g-1 with three-electron reaction at ≈3.53 V during the Na+ extraction/insertion process, realizing an unprecedentedly high energy density of 566.5 Wh kg-1 in the phosphate cathodes for SIBs. It is intriguing to reveal the underlying mechanism of the unique Mn2+ /Mn3+ , Mn3+ /Mn4+ , and Cr3+ /Cr4+ redox couples via X-ray absorption near-edge structure spectroscopy. The whole electrochemical reaction undergoes highly reversible single-phase and biphasic transitions with a moderate volume change of 7.7% through in situ X-ray diffraction and ex situ high-energy synchrotron X-ray diffraction. Combining density functional theory (DFT) calculations with the galvanostatic intermittent titration technique, the superior performance is ascribed to the low ionic-migration energy barrier and desirable Na-ion diffusion kinetics. The present work can offer a new insight into the design of multielectron-reaction cathode materials for SIBs
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|a Journal Article
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|a density functional theory (DFT) computations
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|a energy density
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|a phosphate cathodes
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|a reaction mechanisms
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| 650 |
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|a sodium-ion batteries
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| 700 |
1 |
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|a Liu, Yongchang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Xudong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a He, Lunhua
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Liu, Hui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Song, Yuzhu
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sun, Shengdong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Qiang
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Xing, Xianran
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chen, Jun
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 32(2020), 11 vom: 01. März, Seite e1906348
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:32
|g year:2020
|g number:11
|g day:01
|g month:03
|g pages:e1906348
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|u http://dx.doi.org/10.1002/adma.201906348
|3 Volltext
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