Rights statement: This is the author’s version of a work that was accepted for publication in Journal of Power Sources. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Power Sources 288, 2015 DOI: 10.1016/j.jpowsour.2015.04.009
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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Vanadium-based polyoxometalate as new material for sodium-ion battery anodes
AU - Hartung, Steffen
AU - Bucher, Nicolas
AU - Chen, Han-Yi
AU - Al-Oweini, Rami
AU - Sreejith, Sivaramapanicker
AU - Borah, Parijat
AU - Yanli, Zhao
AU - Kortz, Ulrich
AU - Stimming, Ulrich
AU - Hoster, Harry
AU - Srinivasan, Madhavi
N1 - This is the author’s version of a work that was accepted for publication in Journal of Power Sources. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Power Sources 288, 2015 DOI: 10.1016/j.jpowsour.2015.04.009
PY - 2015/8/15
Y1 - 2015/8/15
N2 - Affordable energy storage is crucial for a variety of technologies. One option is sodium-ion batteries (NIBs) for which, however, suitable anode materials are still a problem. We report on the application of a promising new class of materials, polyoxometalates (POMs), as an anode in NIBs. Specifically, Na6[V10O28]·16H2O is being synthesized and characterized. Galvanostatic tests reveal a reversible capacity of approximately 276 mA h g−1 with an average discharge potential of 0.4 V vs. Na/Na+, as well as a high cycling stability. The underlying mechanism is rationalized to be an insertion of Na+ in between the [V10O28]6− anions rather than an intercalation into a crystal structure; the accompanying reduction of V+V to V+IV is confirmed by X-ray Photoelectron Spectroscopy. Finally, a working full-cell set-up is presented with the POM as the anode, substantiating the claim that Na6[V10O28]·16H2O is a promising option for future high-performing sodium-ion batteries.
AB - Affordable energy storage is crucial for a variety of technologies. One option is sodium-ion batteries (NIBs) for which, however, suitable anode materials are still a problem. We report on the application of a promising new class of materials, polyoxometalates (POMs), as an anode in NIBs. Specifically, Na6[V10O28]·16H2O is being synthesized and characterized. Galvanostatic tests reveal a reversible capacity of approximately 276 mA h g−1 with an average discharge potential of 0.4 V vs. Na/Na+, as well as a high cycling stability. The underlying mechanism is rationalized to be an insertion of Na+ in between the [V10O28]6− anions rather than an intercalation into a crystal structure; the accompanying reduction of V+V to V+IV is confirmed by X-ray Photoelectron Spectroscopy. Finally, a working full-cell set-up is presented with the POM as the anode, substantiating the claim that Na6[V10O28]·16H2O is a promising option for future high-performing sodium-ion batteries.
KW - Sodium-ion batteries
KW - Polyoxometalates
KW - Cluster electrodes
KW - Sodium-ion battery anodes
KW - Hybrid electrode materials
U2 - 10.1016/j.jpowsour.2015.04.009
DO - 10.1016/j.jpowsour.2015.04.009
M3 - Journal article
VL - 288
SP - 270
EP - 277
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -