In order to solve the problem of serious deterioration of electrochemical performance caused by the volume expansion of lithium-ion battery anode materials,gallium-tin (GaSn) liquid alloy and carbon nanofiber network were combined as lithium-ion battery anode materials.GaSn alloys were constrained or encapsulated in nanofiber conductive networks by physical adsorption and electrostatic spinning,respectively.The morphology,structure and properties of the GaSn alloy were characterized and analyzed.The results showed that the GaSn liquid alloy formed submicron alloy microspheres through ultrasonic cavitation effect.When GaSn alloy was adsorbed on the carbon nanofiber membrane substrate,the alloy agglomerated into large particles and embedded on the surface of the nanofiber network,resulting in the inability of other alloys to penetrate into the interior,which affected the performance of GaSn alloy in terms of electrochemical properties.After the mixed electrospinning and carbonization of GaSn alloy,a large number of alloys were covered by carbon film and evenly distributed in the nanofiber network with uniform particle size.Due to the good self-healing,fluidity and flexibility of the liquid alloy,the material in the cycle process could repair the damage caused by lithium removal and fully adhere to the conductive nanofiber network,improving the transmission efficiency of lithium-ion.After the second charge and discharge cycle to 100 cycles,the capacity retention rate was as high as 93.6%.
Zhang Jianfeng, Chen Yu, Liu Hang, Lin Duojia, Xu Zhenkai, Xia Xin
. Preparation and electrochemical performance analysis of carbon-based GaSn alloy anode materials[J]. New Chemical Materials, 2024
, 52(10)
: 90
-95
.
DOI: 10.19817/j.cnki.issn1006-3536.2024.10.047
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