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Electrochemical and structural evolution of structured V<inf>2</inf>O<inf>5</inf> microspheres during Li-ion intercalation

Ki Park, S and Nakhanivej, P and Seok Yeon, J and Ho Shin, K and Dose, WM and De Volder, M and Bae Lee, J and Jin Kim, H and Park, HS (2021) Electrochemical and structural evolution of structured V<inf>2</inf>O<inf>5</inf> microspheres during Li-ion intercalation. Journal of Energy Chemistry, 55. pp. 108-113. ISSN 2095-4956

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Abstract

With the development of stable alkali metal anodes, V O is gaining traction as a cathode material due to its high theoretical capacity and the ability to intercalate Li, Na and K ions. Herein, we report a method for synthesizing structured orthorhombic V O microspheres and investigate Li intercalation/de-intercalation into this material. For industry adoption, the electrochemical behavior of V O as well as structural and phase transformation attributing to Li intercalation reaction must be further investigated. Our synthesized V O microspheres consisted of small primary particles that were strongly joined together and exhibited good cycle stability and rate capability, triggered by reversible volume change and rapid Li ion diffusion. In addition, the reversibility of phase transformation (α, ε, δ, γ and ω-Li V O ) and valence state evolution (5+, 4+, and 3.5+ ) during intercalation/de-intercalation were studied via in-situ X-ray powder diffraction and X-ray absorption near edge structure analyses. 2 5 2 5 2 5 2 5 x 2 5

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Depositing User: Unnamed user with email sms67@cam.ac.uk
Date Deposited: 13 Aug 2020 03:47
Last Modified: 13 Apr 2021 07:01
DOI: 10.1016/j.jechem.2020.06.028