Constructing metal-anode rechargeable batteries utilizing concomitant intercalation of Li-Mg dual cations into Mo6S8
Constructing metal-anode rechargeable batteries utilizing concomitant intercalation of Li-Mg dual cations into Mo6S8
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DOI：
10.1039/c6ta10663c
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发表时间：
2017-02-21
影响因子：
11.9
通讯作者：
Matsubara, Eiichiro
中科院分区：
文献类型：
--
作者：
Li, Hongyi;Ichitsubo, Tetsu;Matsubara, Eiichiro
锂镁双盐电池（DSB）引起了越来越多的关注，因为构建高能量密度 DSB 的一种新方法是利用各自的载流子阳离子。然而，之前对Li-Mg DSB的研究几乎仅限于丹尼尔型电池，而没有获得高能量密度的摇椅型电池。在这项工作中，我们通过实验证明，当在 LiTFSA-Mg(TFSA) 2/triglyme(G3) 电解质中放电时，Li 和 Mg 离子会以几乎相同的比例同时嵌入 Chevrel 化合物 Mo6S8 中。通过利用这一特性，我们用两电极纽扣电池证实了充电后可获得非枝晶电沉积形态。这项工作表明了室温摇椅式双盐电池的可行性，为未来安全高能量密度的“金属阳极”可充电电池提供了新的策略。
Li-Mg dual-salt batteries (DSBs) have attracted growing attention, because a novel way to construct high-energy density DSBs is to take advantage of respective carrier cations. However, previous studies on Li-Mg DSBs have been almost limited to Daniell-type batteries, not attaining rocking-chair-type batteries with high-energy densities. In this work, we show experimentally that concomitant intercalation of Li and Mg ions into the Chevrel compound Mo6S8 in almost equal proportions can occur when discharging in a LiTFSA-Mg(TFSA) 2/triglyme(G3) electrolyte. By exploiting this feature, we confirmed with two-electrode coin cells that non-dendritic electrodeposition morphology is available after charge. This work indicates the feasibility of room-temperature rocking-chair-type dual-salt batteries, which provides a new strategy for future safe "metal-anode" rechargeable batteries with high energy densities.