Journal
ADVANCED SCIENCE
Volume 6, Issue 4, Pages -Publisher
WILEY
DOI: 10.1002/advs.201800981
Keywords
electrolyte additives; magnesium polysulfide cathodes; magnesium/sulfur batteries
Categories
Funding
- DOE Office of Science User Facility [DE-AC02-05CH11231]
- National Natural Science Foundation of China [21433013]
- National Key Research and Development Program of China [2016YFB0100100]
- CAS-DOE Joint Research Program [121E32KYSB20150004]
- CAS-Queensland Collaborative Science Fund [121E32KYSB20160032]
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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.
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