Sodium storage in Na-rich NaxFeFe(CN)6 nanocubes

Yang Liu; Yun Qiao; Wuxing Zhang; Zhen Li; Xiao Ji; Ling Miao; Lixia Yuan; Xianluo Hu; Yunhui Huang

doi:10.1016/j.nanoen.2015.01.012

Sodium storage in Na-rich Na_xFeFe(CN)₆ nanocubes

Yang Liu, Yun Qiao, Wuxing Zhang, Zhen Li, Xiao Ji, Ling Miao, Lixia Yuan, Xianluo Hu, Yunhui Huang

Research output: Contribution to journal › Article › peer-review

260 Scopus citations

Abstract

Na-rich prussian blue analogues (PBs) with high coulombic efficiency are of fundamental and technological importance for sodium-ion batteries (SIBs). Here we report high-quality Na_xFeFe(CN)₆ nanocubes as cathode materials for SIBs and investigate their sodium storage mechanism. Among them, Na-rich Na_1.70FeFe(CN)₆ shows highly reversible electrochemical reactions, delivering a capacity as high as 120.7mAhg^-1 at a current density of 200mAg^-1; even at 1200mAg^-1, the capacity still retains up to 73.6mAhg^-1. The first-cycle coulombic efficiency strongly depends on the sodium content in Na_xFeFe(CN)₆. Experimental results and first-principle calculations demonstrate that sodium cations in the large cavities of PBs have a priority to occupy the 8c site, while in the Na-rich samples, Na⁺ ions can be pushed into other 24d site. We believe that our findings can provide new insights into sodium storage mechanism for the PBs.

Original language	English
Pages (from-to)	386?393-393
Journal	Nano Energy
Volume	12
DOIs	https://doi.org/10.1016/j.nanoen.2015.01.012
State	Published - 1 Mar 2015
Externally published	Yes

Keywords

First-principle theory
NaFeFe(CN) cathode
Nanocubes
Sodium storage mechanism
Sodium-ion batteries

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.nanoen.2015.01.012

Cite this

@article{10cedaac2bb34b9baf94301fe3db47b2,

title = "Sodium storage in Na-rich NaxFeFe(CN)6 nanocubes",

abstract = "Na-rich prussian blue analogues (PBs) with high coulombic efficiency are of fundamental and technological importance for sodium-ion batteries (SIBs). Here we report high-quality NaxFeFe(CN)6 nanocubes as cathode materials for SIBs and investigate their sodium storage mechanism. Among them, Na-rich Na1.70FeFe(CN)6 shows highly reversible electrochemical reactions, delivering a capacity as high as 120.7mAhg-1 at a current density of 200mAg-1; even at 1200mAg-1, the capacity still retains up to 73.6mAhg-1. The first-cycle coulombic efficiency strongly depends on the sodium content in NaxFeFe(CN)6. Experimental results and first-principle calculations demonstrate that sodium cations in the large cavities of PBs have a priority to occupy the 8c site, while in the Na-rich samples, Na+ ions can be pushed into other 24d site. We believe that our findings can provide new insights into sodium storage mechanism for the PBs.",

keywords = "First-principle theory, NaFeFe(CN) cathode, Nanocubes, Sodium storage mechanism, Sodium-ion batteries",

author = "Yang Liu and Yun Qiao and Wuxing Zhang and Zhen Li and Xiao Ji and Ling Miao and Lixia Yuan and Xianluo Hu and Yunhui Huang",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = mar,

day = "1",

doi = "10.1016/j.nanoen.2015.01.012",

language = "英语",

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T1 - Sodium storage in Na-rich NaxFeFe(CN)6 nanocubes

AU - Liu, Yang

AU - Qiao, Yun

AU - Zhang, Wuxing

AU - Li, Zhen

AU - Ji, Xiao

AU - Miao, Ling

AU - Yuan, Lixia

AU - Hu, Xianluo

AU - Huang, Yunhui

PY - 2015/3/1

Y1 - 2015/3/1

N2 - Na-rich prussian blue analogues (PBs) with high coulombic efficiency are of fundamental and technological importance for sodium-ion batteries (SIBs). Here we report high-quality NaxFeFe(CN)6 nanocubes as cathode materials for SIBs and investigate their sodium storage mechanism. Among them, Na-rich Na1.70FeFe(CN)6 shows highly reversible electrochemical reactions, delivering a capacity as high as 120.7mAhg-1 at a current density of 200mAg-1; even at 1200mAg-1, the capacity still retains up to 73.6mAhg-1. The first-cycle coulombic efficiency strongly depends on the sodium content in NaxFeFe(CN)6. Experimental results and first-principle calculations demonstrate that sodium cations in the large cavities of PBs have a priority to occupy the 8c site, while in the Na-rich samples, Na+ ions can be pushed into other 24d site. We believe that our findings can provide new insights into sodium storage mechanism for the PBs.

AB - Na-rich prussian blue analogues (PBs) with high coulombic efficiency are of fundamental and technological importance for sodium-ion batteries (SIBs). Here we report high-quality NaxFeFe(CN)6 nanocubes as cathode materials for SIBs and investigate their sodium storage mechanism. Among them, Na-rich Na1.70FeFe(CN)6 shows highly reversible electrochemical reactions, delivering a capacity as high as 120.7mAhg-1 at a current density of 200mAg-1; even at 1200mAg-1, the capacity still retains up to 73.6mAhg-1. The first-cycle coulombic efficiency strongly depends on the sodium content in NaxFeFe(CN)6. Experimental results and first-principle calculations demonstrate that sodium cations in the large cavities of PBs have a priority to occupy the 8c site, while in the Na-rich samples, Na+ ions can be pushed into other 24d site. We believe that our findings can provide new insights into sodium storage mechanism for the PBs.

KW - First-principle theory

KW - NaFeFe(CN) cathode

KW - Nanocubes

KW - Sodium storage mechanism

KW - Sodium-ion batteries

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