Actions for Investigating the Mechanism of Reversible Lithium Insertion into Anti-NASICON Fe<sub>2<

Email RIS file
Bookmark
Report an Issue

Investigating the Mechanism of Reversible Lithium Insertion into Anti-NASICON Fe<sub>2</sub>(WO<sub>4</sub>)<sub>3</sub> [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
pages 10,813-10,819 : digital, PDF file
Additional Creators
University of Southern California, United States. Department of Energy. Office of Basic Energy Sciences, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Free-to-read Unrestricted online access
Summary
The gram-scale preparation of Fe2(WO4)3 by a new solution-based route and detailed characterization of the material are presented. The resulting Fe2(WO4)3 undergoes a reversible electrochemical reaction against lithium centered around 3.0 V with capacities near 93% of the theoretical maximum. Evolution of the Fe2(WO4)3 structure upon lithium insertion and deinsertion is probed using a battery of characterization techniques, including in situ X-ray diffraction, neutron total scattering, and X-ray absorption spectroscopy (XAS). A structural transformation from monoclinic to orthorhombic phases is confirmed during lithium intercalation. XAS and neutron total scattering measurements verify that Fe2(WO4)3 consists of trivalent iron and hexavalent tungsten ions. As lithium ions are inserted into the framework, iron ions are reduced to the divalent state, while the tungsten ions are electrochemically inactive and remain in the hexavalent state. Lastly, lithium insertion occurs via a concerted rotation of the rigid polyhedra in the host lattice driven by electrostatic interactions with the Li+ ions; the magnitude of these polyhedral rotations was found to be slightly larger for Fe2(WO4)3 than for the Fe2(MoO4)3 analog.
Report Numbers
E 1.99:1437175
Subject(s)
Other Subject(s)
Note
Published through SciTech Connect.
03/07/2017.
ACS Applied Materials and Interfaces 9 12 ISSN 1944-8244 AM
Gozde Barim; Patrick Cottingham; Shiliang Zhou; Brent C. Melot; Richard L. Brutchey.
Funding Information
SC0006812
FG02-11ER46826
DMR-1554204
AC02-06CH11357
AC05-00OR22725
View MARC record | catkey: 24044629