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Title: Electrochemically Induced Phase Evolution of Lithium Vanadium Oxide: Complementary Insights Gained via Ex-Situ, In-Situ, and Operando Experiments and Density Functional Theory

Journal Article · · MRS Advances
DOI:https://doi.org/10.1557/adv.2018.281· OSTI ID:1470269

ABSTRACT Understanding the structural evolution of electrode material during electrochemical activity is important to elucidate the mechanism of (de)lithiation, and improve the electrochemical function based on the material properties. In this study, lithium vanadium oxide (LVO, LiV3O8) was investigated using ex-situ, in-situ, and operando experiments. Via a combination of in-situ X-ray diffraction (XRD) and density functional theory results, a reversible structural evolution during lithiation was revealed: from Li poor α phase (LiV3O8) to Li rich α phase (Li2.5V3O8) and finally β phase (Li4V3O8). In-situ and operando energy dispersive X-ray diffraction (EDXRD) provided tomographic information to visualize the spatial location of the phase evolution within the LVO electrode while inside a sealed lithium ion battery.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Mesoscale Transport Properties (m2M)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC0012673
OSTI ID:
1470269
Journal Information:
MRS Advances, Vol. 3, Issue 22; Related Information: m2M partners with Stony Brook University (lead); Brookhaven National Laboratory; Columbia University; Georgia Institute of Technology; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; University of California, Berkeley; University of North Carolina at Chapel Hill; ISSN 2059-8521
Publisher:
Materials Research Society (MRS)
Country of Publication:
United States
Language:
English

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