MgCl2-AlCl3-PY13FSI/organic ether for rechargeable magnesium battery electrolytes
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.
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