MgCl_(2)-AlCl_(3)-PY_(13)FSI/有机醚可充镁电池电解液  

MgCl_(2)-AlCl_(3)-PY_(13)FSI/organic ether for rechargeable magnesium battery electrolytes

作　　者：魏鑫 卢立伟 文家新[2] 刘晓晨 杨京东 刘洋 WEI Xin;LU Liwei;WEN Jiaxin;LIU Xiaochen;YANG Jingdong;LIU Yang(College of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Chongqing Industry Polytechnic College,Chongqing 401120,China;College of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401120,China)

机构地区：[1]湖南科技大学材料科学与工程学院,湖南湘潭411201 [2]重庆工业职业技术学院,重庆401120 [3]重庆大学化学化工学院,重庆401120

出　　处：《兵器材料科学与工程》2025年第1期101-108,共8页Ordnance Material Science and Engineering

摘　　要：为改善MACC电解液的预调节过程和充放电性能,将N-甲基-N-丙基吡咯烷鎓双(氟磺酰)亚胺(PY_(13)FSI)作为添加剂制备Mg Cl_(2)-Al Cl_(3)-PY_(13)FSI/THF(MACCP)可充镁电池电解液。研究MACCP电解液的电化学性能、组成和正极材料的兼容性。结果表明:MACCP电解液的预调节过程明显缩短;MACCP电解液中新增了Al Cl_(2)F_(2)^(-)和Al Cl_(3)F^(-)离子;Mo_(6)S_(8)|MACCP|Mg电池在0.3 C下,循环240圈后放电比容量为54.2 m Ah/g,放电性能显著增强。这主要源于PY_(13)FSI电解产生的F^(-)同Cl^(-)产生竞争,生成新的有效离子,提高了Mg^(2+)沉积/溶出速率;PY_(13)FSI参与进电解液/电极界面反应,增强了界面的稳定性。MACCP电解液制备工艺简单,对促进可充镁电池的发展应用具有重要意义。MgCl_(2)-AlCl_(3)-PY_(13)FSI/THF(MACCP)rechargeable magnesium battery electrolyte was prepared by N-methyl-N-propyl pyrrolidonium bis(fluoro sulfonyl)imide(PY_(13)FSI)as additive to improve the pre-regulation process and charge-discharge performance of MACC electrolyte.The electrochemical performance of MACCP electrolyte,the composition of electrolyte and the compatibility of cathode materials were studied.The results show that the pre-regulation process of MACCP electrolyte is shortened obviously.AlCl_(2)F_(2)^(-)and AlCl_(3)F^(-)ions are added in MACCP electrolyte.The discharge capacity of the Mo_(6)S_(8)|MACCP|Mg battery is 54.2 mAh/g after 240 cycles at 0.3 C,and the discharge performance is significantly enhanced.This is mainly due to the competition between F^(-)and Cl^(-)produced by electrolysis of PY_(13)FSI and the formation of new effective ions,which improves the deposition/dissolution rate of Mg^(2+).PY_(13)FSI participates in the reaction at the electrolyte/electrode interface,which enhances the stability of the interface.The preparation process of MACCP electrolyte is simple,which is of great significance for promoting the development and application of rechargeable magnesium batteries.

关 键 词：可充镁电池 MACC电解液 N-甲基-N-丙基吡咯烷翁双(氟磺酰)亚胺 电化学性能 

分 类 号：TM911[电气工程—电力电子与电力传动]