The electrochemical properties of nickel chloride as a cathode in basic electrolyte have been much examined, but little study has focused on those properties in acidic electrolyte. In this study, the electrochemical behavior of Al-NiCl₂ in acidic AlCl₃-EMIC ionic liquid electrolyte is investigated, confirming the reversible reaction between Ni(2) and Ni. The assembled cell delivers an initial discharge capacity of 115.0 mA h g⁻¹ at 100 mA g⁻¹, and it remains at 93.7 mA h 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 as the dissolution of partial Ni metal generated from the reduction of NiCl₂ during discharging in the acidic electrolyte.

中文翻译：

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NiCl2 / Ni在酸性AlCl3基离子液体电解质中的电化学行为

已经对作为碱性电解质中阴极的氯化镍的电化学性质进行了广泛的研究，但很少有研究集中在酸性电解质中。在这项研究中，研究了Al-NiCl ₂在酸性AlCl ₃ -EMIC离子液体电解质中的电化学行为，证实了Ni（2）和Ni之间可逆的反应。组装好的电池在100 mA g ^-1时提供115.0 mA hg ^-1的初始放电容量，并保持在93.7 mA hg ^-1处超过100个循环，库仑效率为97.9％，显示出高比容量和稳定的循环性能。另外，该电池的降解机理被证实为在酸性电解质中放电期间由NiCl ₂的还原产生的部分Ni金属的溶解。