Repository logo
 

Superionic Lithium Intercalation through 2 x 2 nm(2) Columns in the Crystallographic Shear Phase Nb18W8O69

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Griffith, Kent J 
Grey, Clare P 

Abstract

Nb18W8O69 (9Nb2O5·8WO3) is the tungsten-rich end-member of the Wadsley–Roth crystallographic shear (cs) structures within the Nb2O5–WO3 series. It has the largest block size of any known, stable Wadsley–Roth phase, comprising 5 × 5 units of corner-shared MO6 octahedra between the shear planes, giving rise to 2 × 2 nm2 blocks. Rapid lithium intercalation is observed in this new candidate battery material and 7Li pulsed field gradient nuclear magnetic resonance spectroscopy—measured in a battery electrode for the first time at room temperature—reveals superionic lithium conductivity with Li diffusivities at 298 K predominantly between 10–10 and 10–12 m2·s–1. In addition to its promising rate capability, Nb18W8O69 adds to our understanding of the large family of high-performance Wadsley–Roth complex metal oxides.

Description

Keywords

40 Engineering, 4016 Materials Engineering, 34 Chemical Sciences, 3406 Physical Chemistry, 7 Affordable and Clean Energy

Journal Title

Chemistry of Materials

Conference Name

Journal ISSN

0897-4756
1520-5002

Volume Title

32

Publisher

American Chemical Society

Rights

All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/M009521/1)