An AlCl3 based ionic liquid with a neutral substituted pyridine ligand for electrochemical deposition of aluminum

Youxing Fang, Kazuki Yoshii, Xueguang Jiang, Xiao Guang Sun, Tetsuya Tsuda, Nada Mehio, Sheng Dai

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A new ionic liquid (IL) based on a "neutral" ligand, 4-propylpyridine, is obtained via complexation with AlCl3. It is found that the asymmetric cleavage of AlCl3 generates AlCl2+ and AlCl4-, and the former is coordinated by 4-propylpyridine to produce the Al-containing cations ([AlCl2(4-Pr-Py)2]+). The AlCl3/4-propylpyridine IL with a molar ratio of 1.3/1 is highly fluidic with a viscosity of 42.8 mPa s and an ionic conductivity of 5.0 × 10-4 S/cm at room temperature. In contrast to conventional ILs for electroplating aluminum in which the electrochemically active species are Al-containing anions (for example Al2Cl7-), this new IL has an Al-containing cation as the electroactive species, which is beneficial to electrodeposition of aluminum.

Original languageEnglish
Pages (from-to)82-88
Number of pages7
JournalElectrochimica Acta
Publication statusPublished - 2015 Apr 1



  • Al electroplating
  • Al-containing cations
  • Al-containing ionic liquid
  • neutral ligand

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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