UM
"electron/Ion Sponge"-Like V-Based Polyoxometalate: Toward High-Performance Cathode for Rechargeable Sodium Ion Batteries
Liu J.1; Chen Z.1; Chen S.1; Zhang B.1; Wang J.1; Wang H.1; Tian B.3; Chen M.2; Fan X.4; Huang Y.1; Sum T.C.1; Lin J.1; Shen Z.X.1
2017-07-25
Source PublicationACS Nano
ISSN1936086X 19360851
Volume11Issue:7Pages:6911-6920
AbstractOne key challenge facing room temperature Na-ion batteries lies in identifying earth-abundant, environmentally friendly and safe materials that can provide efficient Na storage sites in Na-ion batteries. Herein, we report such a material, polyoxometalate Na H [MnV O ] (NMV), with entirely different composition and structure from those cathode compounds reported before. Ex-situ XPS and FTIR analyses reveal that NMV cathode behaves like an "electron/Na-ion sponge", with 11 electrons/Na acceptability per mole, which has a decisive contribution to the high capacity. The extraordinary structural features, evidenced by X-ray crystallographic analysis, of Na H [MnV O ] with a flexible 2D lamellar network and 1D open channels provide diverse Na ion migration pathways, yielding good rate capability. First-principle calculations demonstrate that a super-reduced state, [MnV O ] , is formed with slightly expanded size (ca. 7.5%) upon Na insertion compared to the original [MnV O ] . This "ion sponge" feature ensures the good cycling stability. Consequently, benefiting from the combinations of "electron/ion sponge" with diverse Na diffusion channels, when revealed as the cathode materials for Na-ion batteries, Na H [MnV O ]/G exhibits a high specific capacity (ca. 190 mA h/g at 0.1 C), associates with a good rate capability (130 mA h/g at 1 C), and a good capacity retention (81% at 0.2 C). Our results promote better understanding of the storage mechanism in polyoxometalate host, enrich the existing rechargeable SIBs cathode chemistry, and enlighten an exciting direction for exploring promising cathode materials for Na-ion batteries.
Keywordfirst principle calculation mechanism polyoxometalates sodium ion battery sponge
DOI10.1021/acsnano.7b02062
URLView the original
Language英語
Fulltext Access
Citation statistics
Cited Times [WOS]:57   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Nanyang Technological University
2.Harbin University of Science and Technology
3.National University of Singapore
4.Jilin University
Recommended Citation
GB/T 7714
Liu J.,Chen Z.,Chen S.,et al. "electron/Ion Sponge"-Like V-Based Polyoxometalate: Toward High-Performance Cathode for Rechargeable Sodium Ion Batteries[J]. ACS Nano,2017,11(7):6911-6920.
APA Liu J.,Chen Z.,Chen S.,Zhang B.,Wang J.,Wang H.,Tian B.,Chen M.,Fan X.,Huang Y.,Sum T.C.,Lin J.,&Shen Z.X..(2017)."electron/Ion Sponge"-Like V-Based Polyoxometalate: Toward High-Performance Cathode for Rechargeable Sodium Ion Batteries.ACS Nano,11(7),6911-6920.
MLA Liu J.,et al.""electron/Ion Sponge"-Like V-Based Polyoxometalate: Toward High-Performance Cathode for Rechargeable Sodium Ion Batteries".ACS Nano 11.7(2017):6911-6920.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu J.]'s Articles
[Chen Z.]'s Articles
[Chen S.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu J.]'s Articles
[Chen Z.]'s Articles
[Chen S.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu J.]'s Articles
[Chen Z.]'s Articles
[Chen S.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.