The electrodeposition of Zn from trimethyl propylammonium bis(trifluoromethylsulfonyl)imide (TMPATFSI) was investigated. Powdery zinc electrodeposits were obtained from the TMPATFSI-Zn (TFSI)
2 (80:20 mol%) bath at the constant potential of −1.7 V vs. Pt/I
−, I
3− and at the constant current density of 50–200 A m
−2. By the addition of ethylene glycol, however, the cathodic current density and the cathodic current efficiency for the Zn electrodeposition were increased; moreover, the metallic-colored zinc electrodeposits were obtained.
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