添加Ce对1060集流体电池铝箔组织和性能的影响

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

摘要:

选用商业用1060集流体电池铝箔作为基体，添加稀土元素Ce，采用熔炼、除气净化、过滤处理、热轧、冷轧等工艺处理掺Ce铝箔，分析Ce添加对1060集流体电池铝箔的影响规律和机制。结果表明：在1060集流体电池铝箔中形成了AlCeSi金属间化合物相，其作为异质形核核心，能够细化晶粒；在冷轧变形过程中，晶界处含有Ce的第二相粒子产生强Zener钉扎效应，增加位错密度，抑制再结晶。细晶强化和位错强化协同强化，改善了铝箔的力学性能。添加Ce还能够降低基体中杂质元素的固溶度，改变晶格畸变散射，提高其导电性。添加稀土元素Ce，能够细化晶粒，促进腐蚀电位沿正向移动，进而提高耐腐蚀性能。

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.