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Improving a Mg/S Battery with YCl3 Additive and Magnesium Polysulfide.

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.

SUBMITTER: Xu Y

PROVIDER: S-EPMC6382296 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature

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Improving a Mg/S Battery with YCl<sub>3</sub> Additive and Magnesium Polysulfide.

Xu Yan Y Zhou Guangmin G Zhao Shuyang S Li Wanfei W Shi Feifei F Li Jia J Feng Jun J Zhao Yuxing Y Wu Yang Y Guo Jinghua J Cui Yi Y Zhang Yuegang Y

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20181212 4

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 st ...[more]

PMID: 30828520

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