Noncovalent Approach to Liquid-Crystalline Ion Conductors: High-Rate Performances and Room-Temperature Operation for Li-Ion Batteries,ACS Omega

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Noncovalent Approach to Liquid-Crystalline Ion Conductors: High-Rate Performances and Room-Temperature Operation for Li-Ion Batteries
ACS Omega ( IF 3.7 ) Pub Date : 2018-01-05 00:00:00 , DOI: 10.1021/acsomega.7b01503
Taira Onuma ₁ , Eiji Hosono ₂ , Motokuni Takenouchi ₁ , Junji Sakuda ₁ , Satoshi Kajiyama ₁ , Masafumi Yoshio ₁ , Takashi Kato ₁

Affiliation

We report advanced liquid-crystalline (LC) electrolytes for use in lithium-ion batteries (LIBs). We evaluated the potential of LC electrolytes with a half cell composed of Li metal and LiFePO₄ which is a conventional positive electrode for LIBs. Low-molecular-weight carbonates of ethylene carbonate or propylene carbonate were incorporated into the two-dimensional (2D) nanostructured electrolyte composed of mesogen-containing carbonate and lithium bis(trifluoromethylsulfonyl)imide. The incorporation of low-molecular-weight carbonates increased the ionic conductivity with maintaining 2D nanostructures in the LC state. High-power performances at relatively high current densities induced by higher ionic conductivities have been achieved by LC electrolytes with low-molecular-weight carbonates. Furthermore, room-temperature operation of LIBs using LC electrolytes is reported for the first time. In the research field of electrolytes for LIBs, we demonstrate the progress of a new category of LC electrolytes.

中文翻译：

液晶离子导体的非共价方法：锂离子电池的高倍率性能和室温运行

我们报告了用于锂离子电池（LIB）的先进液晶（LC）电解质。_{我们评估了采用由锂金属和 LiFePO 4}组成的半电池的 LC 电解质的潜力，LiFePO 4是锂离子电池的传统正极。将碳酸亚乙酯或碳酸亚丙酯的低分子量碳酸酯掺入由含介晶碳酸酯和双(三氟甲基磺酰基)亚胺锂组成的二维(2D)纳米结构电解质中。低分子量碳酸盐的加入提高了离子电导率，同时保持了液晶态的二维纳米结构。具有低分子量碳酸盐的液晶电解质已经在由较高离子电导率引起的相对高电流密度下实现了高功率性能。此外，首次报道了使用液晶电解质的锂离子电池的室温运行。在锂离子电池电解质研究领域，我们展示了新型液晶电解质的进展。

更新日期：2018-01-05

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