Lithium-Ion Battery Anodes of Stacked Nanowire Laminate for Ultrahigh Areal Capacities

Herein, a stacked Ge/Cu nanowire (NW) laminate made by stacking several Ge/Cu nanowire laminates accompanied by the conductive glue adhesives is used to achieve high capacity output per unit area (>10 mA h cm –2 ). The combination of Cu NWs and conductive adhesives constructs a tough and conducting network through the electrode, and the stacked Ge/Cu nanowire laminate electrodes can load an ultrahigh mass of 14.8 mg Ge per unit area and provide an areal capacity output over 16 mA h cm –2 . A full-cell with an areal capacity of 11 mA h cm –2 built by stacked Ge/Cu nanowire laminate anode and Li(Ni 0.5 Co 0.3 Mn 0.2 )O 2 cathode was prepared and used to supply electricity for electronic devices, demonstrating their potential to be a candidate anode for high areal capacity Li-ion microbatteries that can be used for high-tech and integrated microsystems with limited space.