Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 4, Issue 15, Pages 5402-5405Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta01342b
Keywords
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Funding
- National Science Foundation [CMMI-1400261]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1400261] Funding Source: National Science Foundation
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Layered molybdenum trioxide (MoO3) has rarely been studied as an electrode material for sodium ion batteries due to its low electronic conductivity and irreversible phase transitions. Here we demonstrate that MoO3-x, with a well-controlled oxygen vacancy, exhibits near theoretical capacity, excellent rate capability, and 2000 stable cycles with minimal capacity loss. The oxygen vacancy in MoO3-x is responsible for the two-plateau voltage profile, in contrast to the sloping feature observed in alpha-MoO3. This work highlights the importance of oxygen vacancies in enabling long-life rechargeable sodiumion batteries.
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