Correlated Dual-Gradient Electrodes Enabling Spatially Synchronized Sulfur Redox in High-Mass-Loading Li-S Batteries Under High Current Densities.

ABSTRACT: The practical deployment of Li-S batteries is hindered by sluggish redox kinetics and poor ion transport in high-mass-loading sulfur cathodes, especially under fast-charging and high-power-density conditions. Conventional electrocatalyst-based strategies partially mitigate electrochemical polarization by lowering reaction energy barriers but fail to address concentration and ohmic polarization, which become more pronounced in thick electrodes. Here, a coupled material-architecture approach is demonstrated by integrating electrocatalysts into a low-tortuosity, correlated dual-gradient electrode, fabricated via programmable high-resolution stereolithography and pyrolysis-induced carbonization. The microscale pore gradient is deliberately correlated with the active-material gradient to spatia

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC12910539 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature