Effect of precursor solution temperature on the morphology and electrochemical performance of electrodeposited MnO₂ nanofilms for lithium-ion batteries

ABSTRACT

This study investigated the impact of precursor solution temperature on the electrodeposition of MnO₂ material, which were prepared on a nickel substrate using the electrodeposition method under varying precursor solution temperatures of 25°C, 40°C, 50°C, and 60°C, respectively. These materials were subsequently employed as anodes in lithium-ion batteries to study their electrochemical performance. The results indicate that an increase in temperature induces preferential aggregation and growth of MnO₂ nanosheets towards specific orientations, which is advantageous for enhancing the electrochemical performance of MnO₂ electrode materials. Notably, the electrode material prepared at a solution temperature of 50°C exhibited optimal performance. Additionally, the charge transfer impedance was lower, which could be attributed to the growth of the highly conductive β-MnO₂ main phase under 50°C. This study presents a novel approach for effectively improving electrodeposited nanomaterials, offering insights into the optimisation of electrochemical performance.

KEYWORDS:

• MnO₂
• lithium-ion batteries
• anode electrode materials
• electrodeposition method

Disclosure statement

No potential conflict of interest was reported by the author(s).