Graphene-Analogues Boron Nitride Nanosheets Confining Ionic Liquids: A High-Performance Quasi-Liquid Solid Electrolyte
Graphene-Analogues Boron Nitride Nanosheets Confining Ionic Liquids: A High-Performance Quasi-Liquid Solid Electrolyte
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石墨烯类似物氮化硼纳米片限制离子液体：一种高性能准液体固体电解质
DOI：
10.1002/smll.201600358
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发表时间：
2016-07-13
期刊：
影响因子：
13.3
通讯作者：
Dai, Sheng
中科院分区：
文献类型：
--
作者：
Li, Mingtao;Zhu, Wenshuai;Dai, Sheng
固体电解质是安全锂电池最有前途的电解质系统之一，但是这些电解质的低离子电导率严重阻碍了有效的锂电池的发展。在这里，报道了一类新型的石墨烯 - 阿纳元素氮化氢硼（G-BN）纳米片，据报道，据报道，据报道，据报道，据报道，据报道，据报道，据报道，据报道，在层中和层外室内限制了超高浓度的离子液体（ILS），以引起准液体固体电解质（QLSE）。具有较大特异性表面积的电子绝缘的G-BN纳米片宿主可以将宿主重量的10次限制在25度C的高离子电导率（3.85 x 10（-3）s cm（-1）时，甚至252 x 10（-4）s cm（-4）s cm（-4）s cm（-4）s cm（-1 cm（-1） QLSE的高离子电导率归因于ILS的巨大吸收以及G-BN在G-BN的中间层和未层的G-BN中形成有序的锂离子传输通道。此外，电解质显示出色的电化学性能和电池性能。原则上，这项工作可以实现更广泛的可调性，进一步为基于能量转换设备中分层纳米材料的下一代QLSE制造新的领域。
Solid electrolytes are one of the most promising electrolyte systems for safe lithium batteries, but the low ionic conductivity of these electrolytes seriously hinders the development of efficient lithium batteries. Here, a novel class of graphene-analogues boron nitride (g-BN) nanosheets confining an ultrahigh concentration of ionic liquids (ILs) in an interlayer and out-of-layer chamber to give rise to a quasi-liquid solid electrolyte (QLSE) is reported. The electron-insulated g-BN nanosheet host with a large specific surface area can confine ILs as much as 10 times of the host's weight to afford high ionic conductivity (3.85 x 10(-3) S cm(-1) at 25 degrees C, even 2.32 x 10(-4) S cm(-1) at -20 degrees C), which is close to that of the corresponding bulk IL electrolytes. The high ionic conductivity of QLSE is attributed to the enormous absorption for ILs and the confi ning effect of g-BN to form the ordered lithium ion transport channels in an interlayer and out-of-layer of g-BN. Furthermore, the electrolyte displays outstanding electrochemical properties and battery performance. In principle, this work enables a wider tunability, further opening up a new field for the fabrication of the next-generation QLSE based on layered nanomaterials in energy conversion devices.