Abstract
Rechargeable magnesium/sulfur (Mg/S) batteries are widely regarded as one of the alternatives to lithium‐ion batteries. However, a key factor restricting their application is the lack of suitable electrolyte. Herein, an electrolyte additive that can reduce the polarization voltage is developed and 98.7% coulombic efficiency is realized. The as‐prepared Mg‐ion electrolyte exhibits excellent Mg plating/stripping performance with a low overpotential of 0.11 V for plating process, and high anodic stability up to 3.0 V (vs Mg/Mg2+). When it is coupled with magnesium polysulfide, which has high reactivity and is homogeneously distributed on carbon matrix, the Mg/S cells deliver a good cycling stability with a high discharge capacity over 1000 mAh g−1 for more than 50 cycles.
Highlights
Rechargeable magnesium/sulfur (Mg/S) batteries are widely regarded as one density of 2500 Wh Kg−1.[1]
Unlike metallic lithium,[4] Mg can be safely used as a metal anode because of its dendrite-free it is coupled with magnesium polysulfide, which has high reactivity and is plating and stripping processes.[5]
Mg/S battery concern on the limited availability of resources such as Co, Ni, is still in its juvenile stage owing to lack of suitable electrolyte and Li to meet the tremendous demand in the electric vehicles as seen from Table S1 (Supporting Information). magnesium and grid energy storage
Summary
Rechargeable magnesium/sulfur (Mg/S) batteries are widely regarded as one density of 2500 Wh Kg−1.[1]. We develop a Mg/S battery enabled by the Y-based inorganic salt electrolyte and the Mg polysulfide (MgPS) cathode.
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