MgCl2-AlCl3-PY13FSI/有机醚可充镁电池电解液
MgCl2-AlCl3-PY13FSI/organic ether for rechargeable magnesium battery electrolytes
魏鑫 1卢立伟 1文家新 2刘晓晨 3杨京东 2刘洋1
作者信息
- 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
- 折叠
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(PY13FSI)作为添加剂制备MgCl2-AlCl3-PY13FSI/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AlCl2F2-和AlCl3F-离子;Mo6S8|MACCP|Mg电池在0.3 C下,循环240圈后放电比容量为54.2 mAh/g,放电性能显著增强.这主要源于PY13FSI电解产生的F-同Cl-产生竞争,生成新的有效离子,提高了Mg2+沉积/溶出速率;PY13FSI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.
Abstract
MgCl2-AlCl3-PY13FSI/THF(MACCP)rechargeable magnesium battery electrolyte was prepared by N-methyl-N-propyl pyrrolidonium bis(fluoro sulfonyl)imide(PY13FSI)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.AlCl2F2-and AlCl3F-ions are added in MACCP electrolyte.The discharge capacity of the Mo6S8|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 PY13FSI and the formation of new effective ions,which improves the deposition/dissolution rate of Mg2+.PY13FSI 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Key words
rechargeable magnesium battery/MACC electrolyte/N-methyl-N-propylpyrrolidine bis(fluorosulfonyl)imide/electrochemical performance引用本文复制引用
出版年
2025
NETL
NSTL
万方数据