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Electrochemical and Physical Properties of Imidazolium Chloride Ionic Liquids with Pyrrolidinium or Piperidinium Cation Addition and Their Application in Dual‐Ion Batteries
Energy Technology ( IF 3.6 ) Pub Date : 2020-07-17 , DOI: 10.1002/ente.202000432
Zichuan Lv 1 , Junhui Sun 2 , Shuai Zhou 1 , Yinghui Bian 1 , Hui Chen 1 , Yuxia Li 1 , Meng-Chang Lin 1
Affiliation  

Herein, nonflammable ionic liquid (IL) electrolytes are prepared for dual‐ion batteries (DIBs) by mixing 1‐methyl‐1‐propylpyrrolidinium chloride (P13Cl) or 1‐butyl‐1‐methylpiperidinium chloride (PP14Cl) with 1,2‐dimethyl‐3‐propylimidazolium chloride (DMPICl)/aluminum chloride (AlCl3) to form mixed IL electrolytes. Then, viscosity, ionic conductivity, thermal stability, and electrochemical limits measurements are recorded to reveal the fundamental properties of the mixed IL electrolytes for DIBs, which are not reported previously. As compared with DMPICl/AlCl3 (=1 in mole ratio) electrolyte, using electrolyte with addition of P13Cl or PP14Cl (e.g., 0.63 mole to replace DMPICl), the DIB with graphite electrodes show better electrochemical stability. With the addition of 0.63 P13Cl, the Coulombic efficiency of the DIB reaches up to 96.7% (≈91% for DMPICl/AlCl3); however, specific capacity loss should be considered. In general, ideas for designing higher energy density electrochemical energy storage devices are provided.

中文翻译:

吡咯烷鎓或哌啶阳离子加成的咪唑鎓氯化物离子液体的电化学和物理性质及其在双离子电池中的应用

在此,通过将1-甲基-1-丙基吡咯烷基氯化物(P 13 Cl)或1-丁基-1-甲基哌啶氯化物(PP 14 Cl)与1混合制备用于双离子电池(DIB)的不可燃离子液体(IL)电解质。,2-二甲基-3-丙基咪唑鎓氯化物(DMPIC1)/氯化铝(AlCl 3)形成混合的IL电解质。然后,记录粘度,离子电导率,热稳定性和电化学极限测量值,以揭示用于DIB的混合IL电解质的基本性能,以前没有报道过。与DMPIC1 / AlCl 3(摩尔比= 1)的电解质相比,使用添加了P 13 Cl或PP 14的电解质Cl(例如0.63摩尔以取代DMPIC1),带有石墨电极的DIB表现出更好的电化学稳定性。通过添加0.63 P 13 Cl,DIB的库仑效率高达96.7%(DMPIC1 / AlCl 3约为91%)。但是,应考虑特定的容量损失。通常,提供了设计更高能量密度电化学能量存储装置的想法。
更新日期:2020-09-05
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