Porous Copper Matrix used for Tin Deposition in Lithium-ion Batteries


Andy LauFollow

Document Type

Student Presentation

Presentation Date

April 2016

Faculty Sponsor

Claire Xiong


Lithium batteries has been one of the most widely researched field in energy conversion system. The search for a safe, efficient and environmentally friendly process to produce high capacity anode has been challenging. The current commercial anode is graphite with a theoretical capacity of 372mAh/g. However, tin has exhibited a much higher theoretical capacity of 996mAh/g. One problem with the use of tin as anode is the volumetric enlargement during discharge and charge, which therefore hinder the electrochemical performance of the battery. We successfully design a porous copper matrix to contain the tin particles. The porous structure is prepared using electrodeposition, and a second electrodeposition is used to deposit tin onto the substrate surface. The use of electrodeposition provides a low cost and efficient way to manufacture tin-base anode by removing the need of binder, and laminated electrode. Using electrodeposition, we successfully deposited porous copper matrix and further deposited tin particles into the matrix which has been proven using scanning electron microscopy. With this nanostructure, we are able to obtain a tin base electrode with excellent capacity and stability.

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