Influence of Ce Addition on Microstructure and Properties of 1060 Current Collector Battery Aluminum Foil

Abstract:

Commercially applied 1060 current collector battery aluminum foil was selected as the base material for the addition of rare-earth element Ce. Melting, degassing, filtration, hot rolling, and cold rolling processes were conducted on the Ce-added aluminum foil. The influence of Ce addition on the 1060 current collector battery aluminum foil was analyzed. Results indicate that AlCeSi intermetallic phases are generated in the 1060 current collector battery aluminum foil and act as heterogeneous nucleation sites, therefore refining the grains. In the cold rolling deformation process, the Ce-containing secondary phase particles at the grain boundary produces a strong Zener pinning effect, increases the dislocation density, and inhibits the recrystallization. Consequently, the mechanical properties of the aluminum foil are enhanced through the synergistic actions of grain refinement strengthening and dislocation strengthening. Ce addition also reduces the impurity element solubility in the matrix, modifies lattice distortion scattering, and therefore enhances electrical conductivity. Adding the rare-earth element Ce can refine grains and promotes the positive shift of corrosion potential, thereby improving the corrosion resistance.