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Mitigating electrode polarization through electrolyte concentration optimization
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DOI：10.1016/j.nanoen.2025.110950.png)
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Abstract
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High-loading electrodes are crucial for attaining elevated high energy density in the industrial applications of lithium-ion batteries. However, a rise in electrode loading correlates with an elevation in electrode tortuosity. The elevated tortuosity of the transport pathway may result in a discrepancy between ion transport and electrode reaction, leading to excessive or incomplete reactions of localized particles, creating concentration gradient phenomena, and ultimately causing capacity loss. Research on high-loading electrodes mostly concentrates on the regulation of electrode structure and material modification, while investigations into electrolyte concentration predominantly emphasize solvation structures; however, the correlation between electrolyte concentration and high-loading electrodes has been inadequately explored. This study examines the effect of electrolyte concentration on the electrochemical performance of high-loading LiNi0.83Mn0.12Co0.05O2 (NMC83) electrode. Utilizing pore network modeling (PNM), high-resolution techniques, and pore equivalent diameters (EqD) analysis to compare ion transport pathways and abilities under different electrolyte concentrations. It was observed that a concentration of 1.5 M in the conventional electrolyte can establish a more efficient percolation channel and provide sufficient lithium ions to achieve a balance between ion transport and electrode reaction, thereby alleviating the inherent concentration polarization of high-loading electrodes.
Keywords:
High-loading electrode
Electrolyte concentration optimization
Mitigating electrode polarization
Percolation network optimization
Journal
IF:
17.1
Papers:
1.2W
Citations:
13.0W
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Cited Papers
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