3D Micro-Network Li/Al4Li9 Composite Anodes Constructed by One-Step Melt-Spinning for High Energy Density Lithium Metal Batteries

Chenxing Wang

doi:10.1002/aenm.71402

3D Micro-Network Li/Al4Li9 Composite Anodes Constructed by One-Step Melt-Spinning for High Energy Density Lithium Metal Batteries

2026-08-10

0

PRE

AI

C

Chenxing Wang

Y

Yanxia Liu *

W

W. J. Liu

M

Mingdong Du

M

Mingyu Shi

M

Mingchang Zhang

Y

Yaxiong Yang

W

Wubin Du

C

Chenchen Li

F

Fulai Qi

S

Shengnan He

X

Xu Xue

C

Chao Zheng

J

Jiantuo Gan

Q

Qinqin Ruan

M

Mingxia Gao

吴

吴志军 (Zhijun Wu) *

H

Hongge Pan *

DOI：10.1002/aenm.71402

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Abstract

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Lithium-metal anodes are hindered by inhomogeneous lithium plating/stripping, interfacial side reactions, and volume expansion. The lithium alloy anodes are considered an effective strategy to resolve these problems, but they suffer from structural degradation during cycling. Herein, a 3D micro-network Li/Al4Li9 composite anode is fabricated via one-step melt-spinning. The microstructure evolution of the alloy ribbons is studied systematically by tuning the cooling conditions. Ultimately, a uniform Li/Al4Li9 composite anode with a 3D micro-network is achieved at a copper roller speed of 2200 rpm. The intrinsic Li/Al4Li9 composite anode structure provides synergistic functions: first, the interconnected micro-network provides continuous electron/ion transport pathways and abundant reaction interfaces, which lowers the nucleation barrier and uniform lithium plating/stripping; second, the Li/Al4Li9 composite anode with Al4Li9 skeleton shows high Young's modulus, which buffers volume expansion and uniform stress distribution. In situ optical microscopy and post-cycling SEM images confirm the Li/Al4Li9 composite anode exhibits excellent mitigate structural degradation ability. The Li/Al4Li9||Li/Al4Li9 cells in ether-based electrolyte demonstrate stable cycling for 1600 h at 1 mA cm−2, 1 mAh cm−2, and Li/Al4Li9||LiFePO4 cells in carbonate-based electrolyte retain 81.7% capacity after 204 cycles at 0.5 C. Impressively, the Li/Al4Li9 composite anode is a promising anode for high-energy-density lithium metal batteries.

Keywords:

Li/Al4Li9 composite anodes

lithium metal anode

lithium metal batteries

melt-spinning technology

structural degradation

3D Micro-Network Li/Al4Li9 Composite Anodes Constructed by One-Step Melt-Spinning for High Energy Density Lithium Metal Batteries

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