Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Dehydration-triggered ionic channel engineering in potassium niobate for Li/K-Ion storage
Author: Zhang, S.
Fan, Q.
Liu, Y.
Xi, S.
Liu, X.
Wu, Z.
Hao, J.
Pang, W.K.
Zhou, T.
Guo, Z.
Citation: Advanced Materials, 2020; 32(22):2000380-1-2000380-11
Publisher: Wiley
Issue Date: 2020
ISSN: 0935-9648
Statement of
Shilin Zhang, Qining Fan, Ye Liu, Shibo Xi, Xiufan Liu, Zhibin Wu ... et al.
Abstract: Boosting charge transfer in materials is critical for applications involving charge carriers. Engineering ionic channels in electrode materials can create a skeleton to manipulate their ion and electron behaviors with favorable parameters to promote their capacity and stability. Here, tailoring of the atomic structure in layered potassium niobate (K4Nb6O17) nanosheets and facilitating their application in lithium and potassium storage by dehydration-triggered lattice rearrangement is reported. The spectroscopy results reveal that the interatomic distances of the NbO coordination in the engineered K4Nb6O17 are slightly elongated with increased degrees of disorder. Specifically, the engineered K4Nb6O17 shows enhanced electrical and ionic conductivity, which can be attributed to the enlarged interlamellar spacing and subtle distortions in the fine atomic arrangements. Moreover, subsequent experimental results and calculations demonstrate that the energy barrier for Li+/K+ diffusion is significantly lower than that in pristine K4Nb6O17. Interestingly, the diffusion coefficient of K+ is one order of magnitude higher than that of Li+ , and the engineered K4Nb6O17 presents superior electrochemical performance for K+ to Li+ . This work offers an ionic engineering strategy to enable fast and durable charge transfer in materials, holding great promise for providing guidance for the material design of related energy storage systems.
Keywords: Atomic structural engineering; dehydration; density functional calculations; energy storage; ionic channel engineering
Rights: © 2020 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI: 10.1002/adma.202000380
Grant ID:
Published version:
Appears in Collections:Aurora harvest 8
Chemical Engineering publications

Files in This Item:
There are no files associated with this item.

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