Electrodeposition of a dendrite‐free 3D Al anode for improving cycling of an aluminum–graphite battery

Aluminum–metal batteries show great potential as next-generation energy storage due to their abundant resources and intrinsic safety. However, the crucial limitations of metallic Al anodes, such dendrite corrosion problems in conventional aluminum–metal batteries, remain challenging elusive. Here, we report a novel electrodeposition strategy prepare an optimized 3D anode on carbon cloth with uniform deposition morphology, low local current density, mitigatory volume change. The symmetrical cells superior stable cycling (>450 h) low-voltage hysteresis (~170 mV) at 0.5 mA cm−2. High reversibility (~99.7%) is achieved for plating/stripping. graphite | Al-4/CC full long lifespan 800 cycles 54 mAh g−1 capacity high density 1000 g−1, benefiting from capacitive-controlled distribution. This study proposes design anodes metallic-Al-based by eliminating planar realizing applications aluminum–graphite batteries.