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  Ionometallurgical Step-Electrodeposition of Zinc and Lead and its Application in a Cycling-Stable High-Voltage Zinc-Graphite Battery

Chen, P., Richter, J., Wang, G., Li, D., Pietsch, T., & Ruck, M. (2021). Ionometallurgical Step-Electrodeposition of Zinc and Lead and its Application in a Cycling-Stable High-Voltage Zinc-Graphite Battery. Small, (17): 2102058, pp. 1-13. doi:10.1002/smll.202102058.

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 Creators:
Chen, Peng1, Author
Richter, Janine1, Author
Wang, Gang1, Author
Li, Dongqi1, Author
Pietsch, Tobias1, Author
Ruck, Michael2, Author              
Affiliations:
1External Organizations, ou_persistent22              
2Michael Ruck, Max Planck Fellow, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863444              

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Free keywords: high-voltage zinc-graphite batteries, ionometallurgy, step-electrodeposition, task-specific ionic liquids, zinc electrodeposition from ZnO, Electrodes, Graphite, II-VI semiconductors, Ionic liquids, Lead oxide, Magnesia, Ores, Oxide minerals, Secondary batteries, Temperature, Zinc oxide, Co-electrodeposition, Deep eutectic solvents, Deposited materials, Low temperature conversions, Naturally occurring, Potentiostatic control, Potentiostatic electrodeposition, Reduction potential, Electrodeposition
 Abstract: Ionometallurgy is a new development aiming at the sustainable low-temperature conversion of naturally occurring metal ores and minerals to their metals or valuable chemicals in ionic liquids (ILs) or deep eutectic solvents. The IL betainium bis((trifluoromethyl)sulfonyl)imide, [Hbet][NTf2], is especially suited for this process due to its redox-stability and specific-functionalization. The potentiostatic electrodeposition of zinc and lead starting directly from ZnO and PbO, which dissolve in [Hbet][NTf2] in high concentrations is reported. The initial reduction potentials of zinc(II) and lead(II) are about −1.5 and −1.0 V, respectively. The ionic conductivity of the solution of ZnO in [Hbet][NTf2] is measured and the effect of various temperatures and potentials on the morphology of the deposited material is explored. The IL proves to be stable under the chosen conditions. From IL-solutions, where ZnO, PbO, and MgO have been dissolved, metallic Zn and Pb are deposited under potentiostatic control either consecutively by step-electrodeposition or together in a co-electrodeposition. Using the method, Zn is also deposited on 3D copper foam and assembles into high-voltage zinc-graphite battery. It exhibits a working-voltage up to 2.7 V, an output midpoint discharge-voltage of up to 2.16 V, up to 98.6% capacity-retention after 150 cycles, and good rate performance. © 2021 The Authors. Small published by Wiley-VCH GmbH

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Language(s): eng - English
 Dates: 2021-07-292021-07-29
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1002/smll.202102058
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Title: Small
  Other : Small
Source Genre: Journal
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Publ. Info: Weinheim, Germany : Wiley-VCH
Pages: - Volume / Issue: (17) Sequence Number: 2102058 Start / End Page: 1 - 13 Identifier: ISSN: 1613-6810
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000017440_1