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Electrochemical behaviors of NiCl2/Ni in acidic AlCl3-based ionic liquid electrolyte

Abstract

The electrochemical properties of nickel chloride as cathode in basic electrolyte have been examined much, but little study is determined in acidic electrolyte. In this study, the electrochemical behaviors of Al-NiCl2 in acidic AlCl3-EMIC ionic liquid electrolyte are investigated, confirming the reversible reaction between Ni(2) and Ni. The assembled cell delivers an initial discharge capacity of 115.0 mAh g-1 at 100 mA g-1, and remains at 93.7 mAh g-1 over 100 cycles with a Coulombic efficiency of 97.9%, displaying a high specific capacity with stable cycling performance. Additionally, the degradation mechanism of this cell is verified due to the dissolution of partial Ni metal generated from the reduction of NiCl2 during discharging in the acidic electrolyte.

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Article information


Submitted
08 Feb 2020
Accepted
20 Mar 2020
First published
23 Mar 2020

Inorg. Chem. Front., 2020, Accepted Manuscript
Article type
Research Article

Electrochemical behaviors of NiCl2/Ni in acidic AlCl3-based ionic liquid electrolyte

S. Jiao, J. Tu, M. Kou and M. Wang, Inorg. Chem. Front., 2020, Accepted Manuscript , DOI: 10.1039/D0QI00166J

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