1：Experimental Design and Method Selection:

The study involved the development of an electrochemical cell with a flexible cathode and an anode device for the oxidation of aluminum powder. The process was carried out in galvanostatic mode at a constant current density.

2：Sample Selection and Data Sources:

Initial aluminum powder with an average particle diameter of ～40 μm and aluminum content more than

3：8 wt% was used. List of Experimental Equipment and Materials:

Equipment included the Fritsch Analysette 22 analyzer, JEOL JSM–7407 F electron microscope, ThermoScienti?c X–2 mass spectrometer, GW PSW7 30–72 power source, LTA–M portable thermocouple, TESCAN VEGA3 LMH scanning electron microscope, ARL 9900 WorkStation analytical complex, TG 209 F3 Tarsus thermobalance, SLM Solutions 280 HL unit, PRESSLAM

4：0 unit, MASTERLAM 0 grinding machine, Hitachi —S–3400N scanning electron microscope, and Carl Zeiss Axio Observer Z1 optical microscope. Experimental Procedures and Operational Workflow:

Electrolysis was performed at

5：1 A cm?2 cathode current density, with parameters monitored over time. The oxidized powder was then used for selective laser melting to synthesize 3D objects. Data Analysis Methods:

Characterization included particle size distribution, SEM imaging, elemental analysis, XRD for phase composition, and TG analysis for thermal behavior.