| Autor: |
Keyzer, EN, Glass, HFJ, Liu, Z, Bayley, PM, Dutton, SE, Grey, CP, Wright, DS |
| Přispěvatelé: |
Keyzer, Evan [0000-0002-0655-2813], Liu, Zigeng [0000-0002-2955-5080], Dutton, Sian [0000-0003-0984-5504], Grey, Clare [0000-0001-5572-192X], Wright, Dominic [0000-0002-9952-3877], Apollo - University of Cambridge Repository |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
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| Popis: |
Mg(PF₆)₂-based electrolytes for Mg-ion batteries have not received the same attention as the analogous LiPF₆-based electrolytes used in most Li-ion cells owing to the perception that the PF₆-anion decomposes on and passivates Mg electrodes. No synthesis of the Mg(PF₆)₂ salt has been reported, nor have its solutions been studied electrochemically. Here, we report the synthesis of the complex Mg(PF₆)₂(CH₃CN)₆ and its solution-state electrochemistry. Solutions of Mg(PF₆)₂(CH₃CN)₆ in CH₃CN and CH₃CN/THF mixtures exhibit high conductivities (up to 28 mS·cm‾¹) and electrochemical stability up to at least 4 V vs Mg on Al electrodes. Contrary to established perceptions, Mg electrodes are observed to remain electrochemically active when cycled in the presence of these Mg(PF₆)₂-based electrolytes, with no fluoride (i.e., MgF₂) formed on the Mg surface. Stainless steel electrodes are found to corrode when cycled in the presence of Mg(PF₆)₂ solutions, but Al electrodes are passivated. The electrolytes have been used in a prototype Mg battery with a Mg anode and Chevrel (Mo₃S₄)-phase cathode. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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