Mitigating self-discharge and improving the performance of Mg–S battery in Mg[B(hfip)4]2 electrolyte with a protective interlayer

The self-discharge of magnesium–sulfur battery is improved by adopting interlayer strategy which can effectively absorb dissolved polysulfide, and further improves the electrochemical performance of battery predominantly in Mg[B(hfip)4]2 electrolyte.