nl0c00352_si_001.pdf (1.68 MB)
Lithiophilic Zn Sites in Porous CuZn Alloy Induced Uniform Li Nucleation and Dendrite-free Li Metal Deposition
journal contribution
posted on 2020-03-17, 11:33 authored by Shang-Sen Chi, Qingrong Wang, Bing Han, Chao Luo, Yidong Jiang, Jun Wang, Chaoyang Wang, Yan Yu, Yonghong DengThree-dimensional
(3D) lithiophilic host is one of the most effective
ways to regulate the Li dendrites and volume change in working Li
metal anode. The state-of-the-art 3D lithiophilic hosts are facing
one main challenge in that the lithiophilic layer would melt or fall
off in high-temperature environment when using the thermal infusion
method. Herein, a 3D porous CuZn alloy host containing anchored lithiophilic
Zn sites is employed to prestore Li using the thermal infusion strategy,
and a 3D composite Li is thus fabricated. Benefiting from the lithiophilic
Zn sites with a strong adsorption capacity with Li, which is based
on the analyses of the nucleation overpotential, binding energy calculation,
and the operando optical observation of Li plating/stripping behaviors,
facile uniform Li nucleation and dendrite-free Li deposition could
be achieved in the interior of the 3D porous CuZn alloy host and the
3D composite Li shows remarkable enhancement in electrochemical performance.