TY - JOUR
T1 - Enhancing the Reversibility of Mg/S Battery Chemistry through Li+ Mediation
AU - Gao, Tao
AU - Noked, Malachi
AU - Pearse, Alex J.
AU - Gillette, Eleanor
AU - Fan, Xiulin
AU - Zhu, Yujie
AU - Luo, Chao
AU - Suo, Liumin
AU - Schroeder, Marshall A.
AU - Xu, Kang
AU - Lee, Sang Bok
AU - Rubloff, Gary W.
AU - Wang, Chunsheng
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/9/30
Y1 - 2015/9/30
N2 - Mg metal is a promising anode material for next generation rechargeable battery due to its dendrite-free deposition and high capacity. However, the best cathode for rechargeable Mg battery was based on high molecular weight MgxMo3S4, thus rendering full cell energetically uncompetitive. To increase energy density, high capacity cathode material like sulfur is proposed. However, to date, only limited work has been reported on Mg/S system, all plagued by poor reversibility attributed to the formation of electrochemically inactive MgSx species. Here, we report a new strategy, based on the effect of Li+ in activating MgSx species, to conjugate a dendrite-free Mg anode with a reversible polysulfide cathode and present a truly reversible Mg/S battery with capacity up to 1000 mAh/gs for more than 30 cycles. Mechanistic insights supported by spectroscopic and microscopic characterization strongly suggest that the reversibility arises from chemical reactivation of MgSx by Li+.
AB - Mg metal is a promising anode material for next generation rechargeable battery due to its dendrite-free deposition and high capacity. However, the best cathode for rechargeable Mg battery was based on high molecular weight MgxMo3S4, thus rendering full cell energetically uncompetitive. To increase energy density, high capacity cathode material like sulfur is proposed. However, to date, only limited work has been reported on Mg/S system, all plagued by poor reversibility attributed to the formation of electrochemically inactive MgSx species. Here, we report a new strategy, based on the effect of Li+ in activating MgSx species, to conjugate a dendrite-free Mg anode with a reversible polysulfide cathode and present a truly reversible Mg/S battery with capacity up to 1000 mAh/gs for more than 30 cycles. Mechanistic insights supported by spectroscopic and microscopic characterization strongly suggest that the reversibility arises from chemical reactivation of MgSx by Li+.
UR - http://www.scopus.com/inward/record.url?scp=84942856015&partnerID=8YFLogxK
U2 - 10.1021/jacs.5b07820
DO - 10.1021/jacs.5b07820
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C2 - 26360783
SN - 0002-7863
VL - 137
SP - 12388
EP - 12393
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 38
ER -