轻质三维多孔泡沫铝用作高性能锂金属负极骨架

将轻质、三维多孔且亲锂的泡沫铝用作锂(Li)金属负极骨架，通过简单的机械挤压方法，将泡沫铝与金属 Li复合，制得Al@Li复合负极。泡沫铝自身的高亲锂性，能够为Li金属成核提供丰富且均匀的活性位点，诱导Li在泡沫铝内部的快速成核和均匀电沉积。同时，泡沫铝的三维多孔结构，可以容纳Li金属负极在充放电过程中的巨大体积应变，降低局部电流密度，从而有效抑制Li枝晶的生长。因此，与纯Li金属负极相比，所获得的Al@Li复合负极在对称电池和LiFePO₄||Al@Li半电池中，均表现出了更加优异的循环稳定性。

Lightweight 3D porous Al foams for the hosts of high-performance Li metal anodes

Lightweight, 3D porous, and lithiophilic Al foams has been used as the hosts for Li metal anodes, and compounded with metallic Li by a facile mechanical extrusion method to obtain the Al@Li composite anodes. The high lithiophilicity of Al foams could provide abundant and uniform active sites for Li nucleation, thus inducing the fast nucleation and uniform electro-deposition of Li metal into the Al foams. Moreover, the 3D porous structures of Al foams could accommodate the huge volume change of Li metal anodes during the charge/discharge process and reduce the local current density, thus effectively inhibiting the growth of Li dendrites. Therefore, compared with the bare Li metal anodes, the obtained Al@Li composite anodes exhibited higher cycling stability of Li plating/stripping with a lower overpotential of ca. 5 mV at 1 mA·cm^-2 after 250 cycles in their symmetric cells. Furthermore, half-cell configurations with the Al@Li composite anodes and LiFePO₄ cathodes also presented significantly enhanced cycling capacity and rate performance.