Xu Yan, Zhou Guangmin, Zhao Shuyang, Li Wanfei, Shi Feifei, Li Jia, Feng Jun, Zhao Yuxing, Wu Yang, Guo Jinghua, Cui Yi, Zhang Yuegang
School of Nano-Tech and Nano-Bionics University of Science and Technology of China Hefei Anhui 230026 China.
i-lab Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Science Suzhou Jiangsu 215123 China.
Adv Sci (Weinh). 2018 Dec 12;6(4):1800981. doi: 10.1002/advs.201800981. eCollection 2019 Feb 20.
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/Mg). 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 for more than 50 cycles.
可充电镁/硫（Mg/S）电池被广泛认为是锂离子电池的替代方案之一。然而，限制其应用的一个关键因素是缺乏合适的电解质。在此，开发了一种可降低极化电压的电解质添加剂，并实现了98.7%的库仑效率。所制备的镁离子电解质表现出优异的镁电镀/剥离性能，电镀过程的过电位低至0.11 V，阳极稳定性高达3.0 V（相对于Mg/Mg）。当它与具有高反应活性且均匀分布在碳基体上的多硫化镁耦合时，Mg/S电池在50多个循环中具有良好的循环稳定性，放电容量超过1000 mAh g。
