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新型无氯镁电解液的性能研究
  

摘要:可充电镁电池以其资源丰富、体积能量密度高、可逆性好、沉积/剥离过程无枝晶产生等优点受到人们的广泛关注。迫切需要一种不含氯离子的非亲核电解质。氟代烷氧硼酸镁电解质具有较高的阳极稳定性、离子电导率和库仑效率。然而,其较差的性能限制了其应用。在本研究中,我们研究了六氟异丙基硼酸镁(MTHB)镁电解液的适用性,该电解质具有良好的可逆沉积和剥离Mg的电化学性能,Mg/S电池和Mg/Mo6S8具有良好的长周期性能,说明该电解质具有良好的相容性。

Abstract: Rechargeable magnesium batteries have been receiving attention because the advantages of resource abundance, high volumetric energy density, high reversibility and dendrite-free plating/stripping of Mg anodes. There is an urgent need for a non-nucleophilic electrolyte that does not contain chloride ions. Fluorinated alkoxyborate based magnesium electrolytes exhibit a high anodic stability, high ionic conductivity and high coulombic efficiency of magnesium. However, the poor performance restricting its application. In this study, we investigated the applicability of magnesium tetrakis(hexafluoroisopropyloxy)borate (MTHB) magnesium electrolyte, The electrolyte exhibited good electrochemical performance for reversible deposition and stripping of Mg, the Mg/S cell and Mg/Mo6S8 showed a good long cycle performance, indicating the good compatibility of the electrolyte.




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