JultikaUniversity of Oulu repository

Litiumioniakuissa käytettävien Si-C-komposiittianodimateriaalien valmistus ja karakterisointi

Tiivistelmä

In the modern era, scientists are trying to find out the solutions for fulfilling the high demands of energy storage and consumption by generating less waste and keeping the environment clean. Among other advanced technologies, lithium-ion batteries are making their way to the promising source of energy supply in the market now a days. The anode component of the Li-ion batteries is mainly graphite which has comparatively low theoretical capacity of 372 mAh/g as compared to Si, which has high theoretical capacity value 4200 mAh/g. Si anode material, in Li-ion batteries, results into high volume expansion (up to100 %- 300%) during charging and discharging processes, which results into breakage of anode structure known as pulverization. In this study, Si/C anode materials are thoroughly studied and proposed as a possible solution for alleviating volume expansion effect and for improved theoretical capacity values of lithium-ion batteries anode materials. Furthermore, different, methods and structural designs are investigated for their contribution to the efficiency of the Si/C anode materials and as well as, material characterization techniques and electrochemical analysis are also studied.