@article{dc5c11aa1c964788a44de28625b62792,
title = "Vanadium-Substituted Tunnel Structured Silver Hollandite (Ag1.2VxMn8- xO16): Impact on Morphology and Electrochemistry",
abstract = "A series of tunnel structured V-substituted silver hollandite (Ag1.2VxMn8-xO16, x = 0-1.4) samples is prepared and characterized through a combination of synchrotron X-ray diffraction (XRD), synchrotron X-ray absorption spectroscopy (XAS), laboratory Raman spectroscopy, and electron microscopy measurements. The oxidation states of the individual transition metals are characterized using V and Mn K-edge XAS data indicating the vanadium centers exist as V5+, and the Mn oxidation state decreases with increased V substitution to balance the charge. Scanning transmission electron microscopy of reduced materials shows reduction-displacement of silver metal at high levels of lithiation. In lithium batteries, the V-substituted tunneled manganese oxide materials reveal previously unseen reversible nonaqueous Ag electrochemistry and exhibit up to 2.5× higher Li storage capacity relative to their unsubstituted counterparts. The highest capacity was observed for the Ag1.2(V0.8Mn7.2)O16·0.8H2O material with an intermediate level of V substitution, likely due to a combination of the atomic composition, the morphology of the particle, and the homogeneous distribution of the active material within the electrode structure where factors over multiple length scales contribute to the electrochemistry.",
author = "Smith, {Paul F.} and Lei Wang and Bock, {David C.} and Brady, {Alexander B.} and Lutz, {Diana M.} and Shize Yang and Xiaobing Hu and Lijun Wu and Yimei Zhu and Marschilok, {Amy C.} and Takeuchi, {Esther S.} and Takeuchi, {Kenneth J.}",
note = "Funding Information: This work was supported as part of the Center for Mesoscale Transport Properties, an Energy Frontier Research Center supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences via Grant DE-SC0012673. This research used beamline 10-BM of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. This research used beamline 28-ID2 (XPD) of the National Synchrotron Light Source II, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Brookhaven National Laboratory under Contract No. DE-SC0012704. The JEOL ARM microscope was supported by the U.S. Department of Energy, Basic Energy Sciences (DOE-BES), Materials Science and Engineering Division, under Contract DE-SC0012704. The FEI Talos microscope was funded by the Center for Functional Nanomaterials, a U.S. DOE Office of Science Facility, at Brookhaven National Laboratory under Contract No. DE-SC0012704. D.M.L. acknowledges the support of the National Science Foundation Graduate Research Fellowship under Grant 1839287. E.S.T. acknowledges support as the William and Jane Knapp Chair of Energy and the Environment. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",
year = "2020",
month = mar,
day = "16",
doi = "10.1021/acs.inorgchem.9b03443",
language = "English (US)",
volume = "59",
pages = "3783--3793",
journal = "Inorganic chemistry",
issn = "0020-1669",
publisher = "American Chemical Society",
number = "6",
}