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A high-energy aqueous aluminum-manganese battery
journal contribution
posted on 2019-11-01, 00:00 authored by S He, J Wang, X Zhang, J Chen, Z Wang, T Yang, Z Liu, Y Liang, B Wang, S Liu, L Zhang, J Huang, Luke O'DellLuke O'Dell, H YuRechargeable aluminum-ion batteries have drawn considerable attention as a new energy storage system, but their applications are still significantly impeded by critical issues such as low energy density and the lack of excellent electrolytes. Herein, a high-energy aluminum-manganese battery is fabricated by using a Birnessite MnO2 cathode, which can be greatly optimized by a divalence manganese ions (Mn2+) electrolyte pre-addition strategy. The battery exhibits a remarkable energy density of 620 Wh kg−1 (based on the Birnessite MnO2 material) and a capacity retention above 320 mAh g−1 for over 65 cycles, much superior to that with no Mn2+ pre-addition. The electrochemical reactions of the battery are scrutinized by a series of analysis techniques, indicating that the Birnessite MnO2 pristine cathode is first reduced as Mn2+ to dissolve in the electrolyte upon discharge, and AlxMn(1−x)O2 is then generated upon charge, serving as a reversible cathode active material in following cycles. This work provides new opportunities for the development of high-performance and low-cost aqueous aluminum-ion batteries for prospective applications.
History
Journal
Advanced Functional MaterialsVolume
29Issue
45Article number
1905228Pagination
1 - 9Publisher
WileyLocation
London, Eng.Publisher DOI
ISSN
1616-301XeISSN
1616-3028Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2019, WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimUsage metrics
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No categories selectedKeywords
Science & TechnologyPhysical SciencesTechnologyChemistry, MultidisciplinaryChemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryPhysics, AppliedPhysics, Condensed MatterChemistryScience & Technology - Other TopicsMaterials SciencePhysicsaluminum-ion batteriesaqueous aluminum-manganese batteriesbirnessite MnO2 cathodesdivalence manganese ionsreaction mechanismCATHODE MATERIALSION BATTERYINTERCALATIONINSERTIONAL3+
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