取代基对苯基格氏试剂电解液电化学性能的影响

Effect of Substituent Groups in Phenyl Grignard Reagent Electrolytes on Electrochemical Performance

摘要: 镁能够在格氏试剂RMgX(R为烷基和苯基等，X为卤素)的醚溶液中实现可逆沉积–溶出，然而，对于不同取代基对格氏试剂电解液的电化学性能影响却很少有人研究。在本文中，我们合成了一系列氟或甲基在不同位置取代的苯基格氏试剂电解液，并研究了他们的电化学性能。结果表明，苯环上不同位置被氟或甲基取代对苯基格氏试剂电解液的镁沉积–溶出可逆性和电化学稳定窗口有显著影响。这些发现为开发新的可充镁电池电解液体系打下了基础。 Mg can be reversibly deposited from ethereal solutions of Grignard salts of the RMgX type (R = alkyl, aryl groups and X = Cl, Br etc.). However, effect of different substituent groups on the electrochemical properties of Grig-nard electrolyte is rarely studied. In this paper, we synthesized a series of phenyl Grignard reagents with substituent groups in different positions and investigated their electrochemical performance. The results show that the Mg deposi-tion/dissolution reversibility and electrochemically stable window of the phenyl Grignard reagent electrolytes are greatly influenced by fluorine or methyl group in different positions on the phenyl ring. These findings pave the way to develop new electrolyte systems for rechargeable magnesium battery.