Lithium-ion battery with high Li+ flux transferability is a key direction in the field of clean energy. However, small thickness, commercial polyolefin separators own low porosity to ensure sufficient thermomechanical properties, resulting tortuous and enlarged diffusion pathways that induce large overpotentials detrimental dendrite growth. This research (DOI: 10.1002/elt2.1) introduces ∼3- μm ...