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Exploration of the high temperature phase evolution of electrochemically modified Sc2(WO4)3 via potassium discharge

Abstract

The electrochemical modification of Sc2(WO4)3 via activation as an electrode against potassium metal is investigated, as well as the subsequent thermal evolution of activated Sc2(WO4)3. Upon discharge to 0.01 V versus K/K+, Sc2(WO4)3 delivers a capacity of 132 mAh g-1. On subsequent heating from 100 to 623 K the discharged electrode exhibits essentially the same thermal expansion as that of the pure powder. Between 673 and 973 K a trigonal K2WO4-type phase (P-3m1) is formed. Variable-temperature X-ray diffraction data indicates that upon heating from 923 K - 1023 K, this phase has a thermal expansion coefficient of -1.90(10) x 10-4 K-1.

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Publication details

The article was received on 12 Jun 2019, accepted on 09 Aug 2019 and first published on 09 Aug 2019


Article type: Research Article
DOI: 10.1039/C9QI00699K
Inorg. Chem. Front., 2019, Accepted Manuscript

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    Exploration of the high temperature phase evolution of electrochemically modified Sc2(WO4)3 via potassium discharge

    J. Liu, A. R. Haworth, K. E. Johnston, D. Goonetilleke and N. Sharma, Inorg. Chem. Front., 2019, Accepted Manuscript , DOI: 10.1039/C9QI00699K

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