Constructing a 3D skeleton inside lithium metal anodes can suppress anode volume change, reduce local current density, and retard lithium dendrite growth. In this study, Li ingots, amorphous B powder, and ZnF2 powder were used as raw materials to prepare a Li-B-Zn alloy with internal 3D skeleton via a melting method. X-ray diffractometer, scanning electron microscope, and energy dispersive spectrometer were employed to characterize the phase composition and internal skeleton structure of the alloy, while the electrochemical performance of the Li-B-Zn alloy anode was evaluated. Results show that nano-sized LiZn particles are uniformly distributed on the LiB fiber skeleton, forming a composite skeleton with abundant lithiophilic sites and excellent structural stability. In symmetric cells, the Li-B-Zn anode achieves a long cycle life of 1 500 h at a high capacity of 5 mAh/cm2. The Li-B-Zn|LFP (LiFePO4) full cell exhibits outstanding electrochemical performance, with a capacity retention rate of up to 90.15% after 370 cycles at 1 C. Li-B-Zn alloy anode has significant performance advantages in practical applications, and constructing an internal composite 3D skeleton is an efficient approach to address current challenges of lithium metal anodes.
YANG Cheng
,
WU Qiumei
,
CHEN Libao
,
WU Zhibin
. Preparation and performance evaluation of highly stable and long-cycling Li-B-Zn alloy anode[J]. Materials Science and Engineering of Powder Metallurgy, 2025
, 30(6)
: 537
-543
.
DOI: 10.19976/j.cnki.43-1448/TF.2025049
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