A Stable Porous Aluminum Electrode with High Capacity for Rechargeable Lithium-Ion Batteries

A binder-free aluminum (Al) electrode was fabricated by electrodeposition on a three-dimensional copper foam (3DCu) or carbon fabric (3DCF) from mixed-halide ionic liquid. The strong adhesion, structural stability and interface compatibility between Al 3DCu facilitate high electrical conductivity effectively alleviate large volume change. In lithium-ion battery, the continuous, dendrite-free Al/3DCu enables stable reversible reactions, which delivered first discharge capacity of 981 mAh g−1 in coin cell at 21 mA g−1. It operates stably for least 12 cycles with depth about 1 per cycle (7 h each) rate cycled maintains good interfacial shows no shedding. contrast to many nanostructured electrodes, amount can reach 30% solid an average conversion Li0.71Al. concept porous 3D electrodes provides compromise diffusion kinetics total active metal available battery alloying-type anodes appears promising application.