Effect of corrosion for Al foils on electrical performance of sphere LiFePO₄/C composite

Using Fe(NO₃)₃9H₂O, H₃PO₄, HNO₃ as the raw materials, the semi-sphere FePO₄ precursors were prepared by liquid phase crystallization method, and then the sphere LiFePO₄/C composite was synthesized by high temperature solid phase method. The corrosive Al foils were characterized by SEM, metalloscope and feeler gauge. The corrosive Al foils were used as the current collector of cathode LiFePO₄/C composite of Li ion battery. The result shows that the surface of corrosive Al foil have 3D dense ordered micro square porous and possessing dense tunnels in the inner and the thickness of Al foil is decreased by 14.29%.The initial discharge capacity at 0.1 C is 153 mAh·g^-1 and the electrode react resistance is 51.12 Ω. LiFePO₄/C composite has good rate property and cycle stability.