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Non-Grignard and Lewis Acid-Free Sulfone Electrolytes for Rechargeable Magnesium Batteries
- Non-Grignard and Lewis Acid-Free Sulfone Electrolytes for Rechargeable Magnesium Batteries
- Kang, SJ[Kang, Sung-Jin]; Lim, SC[Lim, Sung-Chul]; Kim, H[Kim, Hyeonji]; Heo, JW[Heo, Jongwook W.]; Hwang, S[Hwang, Sunwook]; Jang, M[Jang, Minchul]; Yang, D[Yang, Dookyong]; Hong, ST[Hong, Seung-Tae]; Lee, H[Lee, Hochun]
- DGIST Authors
- Kang, SJ[Kang, Sung-Jin]; Lim, SC[Lim, Sung-Chul]; Kim, H[Kim, Hyeonji]; Heo, JW[Heo, Jongwook W.]; Hwang, S[Hwang, Sunwook]; Hong, ST[Hong, Seung-Tae]; Lee, H[Lee, Hochun]
- Issue Date
- Chemistry of Materials, 29(7), 3174-3180
- Article Type
- Anodic Stabilities; Cathode Material; Cation Complex; Chemical Stability; Chloride; Cycle Performance; Cycling Efficiency; Deposition Processes; Electric Batteries; Electrodes; Electrodes; Electrolytes; Ethylene Carbonate; Lithium Ion Batteries; Organic Cathodes; Performance; Rechargeable Magnesium Battery; Salts; Secondary Batteries; Single Crystal X Ray Diffraction Analysis; Single Crystals; Solventscathodes; Sulfone Electrolytes; Systems; X Ray Diffraction Analysis
- A major challenge for developing rechargeable Mg-ion batteries (MIB) is the lack of suitable electrolytes. We report herein dialkyl sulfones as non-Grignard and Lewis acid-free MIB electrolytes. In particular, a dipropyl sulfone (DPSO)/tetrahydrofuran (THF) (1/1, v/v) solution with MgCl2 salt exhibits high ionic conductivity (1.1 mS cm-1 at 30 °C), Mg cycling efficiency (>90%), and anodic stability (ca. 3.0 V vs Mg). As evidenced by single crystal X-ray diffraction analysis, a novel [Mg(DPSO)6]2+ cation complex balanced by two [MgCl3(THF)]- anions is identified in the DPSO/THF solution. The DPSO/THF electrolyte also enables excellent cycle performance (>300 cycles) of a Chevrel phase Mo6S8 cathode and displays a decent compatibility with an organic cathode (3,4,9,10-perylenetetracarboxylic dianhydride, PTCDA). Along with the superior electrochemical properties of the DPSO/THF electrolyte, its innate chemical stability and eco-friendly nature make it a promising MIB electrolyte. © 2017 American Chemical Society.
- American Chemical Society
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