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Intercalation of Magnesium into a Layered Vanadium Oxide with High Capacity

Journal Article · · ACS Energy Letters
 [1];  [2];  [3];  [4];  [4];  [3];  [3];  [5];  [3];  [4];  [3];  [5];  [3];  [2];  [3];  [3];  [4]
  1. Univ. of Illinois, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Joint Center for Energy Storage Research (JCESR); Pusan National Univ., Busan (Korea, Republic of)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
  4. Univ. of Illinois, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Univ. of Illinois, Chicago, IL (United States)
+ Show Author Affiliations
While α-V2O5 has traditionally been considered as a promising oxide to reversibly intercalate high levels of Mg2+ at high potential, recent reports indicate that previously observed electrochemical activity is dominated by intercalation of H+ rather than Mg2+, even in moderately dry nonaqueous electrolytes. Consequently, the inherent functionality of oxides to intercalate Mg2+ remains in question. By conducting electrochemistry in a chemically and anodically stable ionic liquid electrolyte, we report that, at 110 °C, layered α-V2O5 is indeed capable of reversibly intercalating 1 mol Mg2+ per unit formula, to accumulate capacities above 280 mAh g–1. Multimodal characterization confirmed intercalation of Mg2+ by probing the elemental, redox, and morphological changes undergone by the oxide. After cycling at 110 °C, the electrochemical activity at room temperature was significantly enhanced. The results renew prospects for functional Mg rechargeable batteries surpassing the levels of energy density of current Li-ion batteries.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Research Foundation (NRF) of Korea; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Joint Center for Energy Storage Research (JCESR); UUSDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1534512
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 7 Vol. 4; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Unlocking the Potential of Disordered Rocksalts for Aqueous Zinc‐Ion Batteries journal September 2019
Layered H 0.68 Ti 1.83 O 4 /reduced graphene oxide nanosheets as a novel cathode for rechargeable magnesium batteries journal January 2019
Interlayer separation in hydrogen titanates enables electrochemical proton intercalation journal January 2020

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