Development of Graphene/Silicon Composite Based Lithium Ion Battery Anode

The need for energy storage devices is growing constantly, requiring the development of more efficient, high-capacity batteries. Due to their superior properties compared to conventional batteries, lithium-ion battery cells have become the most popular energy storage units, and they are now widely used in our daily lives. The most common application area for Li-ion batteries is electric vehicles. The Li-ion battery cells used in electric cars are expected to have a short charging time, a long cycle life, a low weight per volume, and a large storage capacity. The anode structure of Li-ion batteries should be enhanced to obtain these desirable features. The most commonly utilized active material in the battery anode structure is graphite. Although graphite's electrical conductivity and extended service life are superior to those of its alternatives, its low charge capacity and small surface area require further development. Silicon is another common component in Li-ion batteries. Silicon can store ten times more Li ions than graphite; nevertheless, anodes made of Si rather than graphite degrade more quickly and have a shorter service life due to structural fragmentation produced by high-volume fluctuations during charge/discharge cycles. Because of its enormous surface area, mechanical and electrical capabilities, and chemical resistance, graphene, a two-dimensional honeycomb structure of carbon atoms, has a lot of potential to solve these challenges. As a result, the purpose of this research is to use a Gr/Si composite structure to improve the energy storage capacity, mechanical characteristics, and chemical resistance of a battery anode. Top-down processes such as high vacuum furnaces, wet chemistry, and the flash method are used to make Gr for Gr/Si composites. The morphology of synthesized materials is examined using OM, TEM, and SEM. Raman spectroscopy is used to examine their structure. BET analysis is used to determine the surface area of the composite anode material. Electrochemical characterization methods will be used to determine the charge capacity of Gr/Si composites, which will be reported.