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Influence of Diffusional Lithium Trapping on Polarization Behavior of Li-Al Anode Materials
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Fangduo HUANG, Tingting SUN, Junliang LIU, Xuefan FENG, Wenrui YU, Fuqin ZHANG
Mining and Metallurgical Engineering | 2025, 45(1) : 171 - 178
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Mining and Metallurgical Engineering | 2025, 45(1): 171-178
• MATERIALS •
Influence of Diffusional Lithium Trapping on Polarization Behavior of Li-Al Anode Materials
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Fangduo HUANG, Tingting SUN, Junliang LIU, Xuefan FENG, Wenrui YU, Fuqin ZHANG
Affiliations
  • Powder Metallurgy Research Institute, Central South University, Changsha 410083, Hunan, China
Published: 2025-02-01 doi: 10.3969/j.issn.0253-6099.2025.01.032
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The effect of solid state diffusion of Li on the polarization behavior of Li-Al alloy anode was studied, and Li-Al electrodes with different specific surface areas and Cu@Li electrodes without the effect of solid state diffusion of Li were prepared. The polarization behavior of electrodeposited Li-Al alloy with a deposited capacity of 0.51 mAh/cm2 in a half cell and a full cell were investigated by using galvanostatic charge-discharge measurement, cyclic voltammetry, electrochemical impedance spectroscopy (EIS), and galvanostatic intermittent titration technique. The results show that the solid-state diffusion of Li in Li-Al is the main reason for the polarization of Li-Al electrode in a half cell and a full cell, and the diffusional lithium trapping will increase the internal resistance of the cell, bringing in enhanced polarization phenomenon and finally resulting in the low discharge potential of about 1.84 and 1.55 V for Li-Al‖S battery. Surface α-Al layer causes diffusional lithium trapping, and disrupting it can not only increase the Li+ concentration in the electrolyte and promote the precipitation of Li2S, leading to reduced polarization, but also increase discharge voltage of LiAl‖S battery to approach the thermodynamic discharge potential.

lithium-sulfur battery  /  Li-Al alloy anode  /  diffusional lithium trapping  /  structural degradation  /  cathode material  /  polarization behavior
Fangduo HUANG, Tingting SUN, Junliang LIU, Xuefan FENG, Wenrui YU, Fuqin ZHANG. Influence of Diffusional Lithium Trapping on Polarization Behavior of Li-Al Anode Materials[J]. Mining and Metallurgical Engineering, 2025 , 45 (1) : 171 -178 . DOI: 10.3969/j.issn.0253-6099.2025.01.032
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doi: 10.3969/j.issn.0253-6099.2025.01.032
  • Receive Date：2024-09-05
  • Online Date：2026-03-17
  • Published：2025-02-01
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  • Received：2024-09-05
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    Powder Metallurgy Research Institute, Central South University, Changsha 410083, Hunan, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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