阳极
成核
材料科学
集电器
化学工程
阴极
电流密度
多孔性
枝晶(数学)
金属
电池(电)
纳米技术
电极
复合材料
冶金
电解质
化学
工程类
物理化学
功率(物理)
有机化学
数学
物理
量子力学
几何学
作者
Hao Yang,Libao Chen,Xuyan Ni,Yuejiao Chen,Jianmin Niu,Lin Mei
标识
DOI:10.1016/j.jallcom.2022.164925
摘要
The increasing demand for high energy density battery systems has accelerated the development of lithium metal batteries, and it is imperative to seek strategies for alleviating the large volume change and inhibiting dendrite growth of the Li metal anode. 3D porous anode current collectors cooperated with surface modification have been considered as effective methods. Herein, we develop 3D porous Cu with modest pores by powder metallurgy method, combined with surface modification by lithiophilic Ag nanoparticles. The obtained ingenious porous structure ensures the reduction of local current density when served as the Li anode current collector, while the Ag nanoparticle layer provides numerous lithiophilic nucleation sites. Smooth and uniform Li plating morphologies are confirmed on the PM [email protected] electrode surface, and the PM [email protected] symmetric cell presents a stable cycle of 1600 h, which effectively inhibits the Li dendrite growth. When coupled with the LiFePO4 cathode, the assembled full cell exhibits superb capacity retention and stability for 600 cycles at 0.5 C. This facile and rational strategy with synergistic effect of modest pores and surface lithiophilicity provides a way to achieve highly stable Li metal anodes for next-generation Li batteries.
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