SYNTHESIS OF SIOX/C MATERIAL FROM ELEUSINE INDICABIOMASS AS LITHIUM ION BATTERY ANODE
Lithium-ion batteries (LIBs) are the preferred energy storage technology today due to their rechargeability, high energy density, and stable charging-discharging cycles. However, commercial LIBs still have limitations in performance due to the use of graphite anodes with low capacity (372 mAh/g). Th...
Saved in:
| Main Author: | |
|---|---|
| Format: | Final Project |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/73684 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Lithium-ion batteries (LIBs) are the preferred energy storage technology today due to their rechargeability, high energy density, and stable charging-discharging cycles. However, commercial LIBs still have limitations in performance due to the use of graphite anodes with low capacity (372 mAh/g). Therefore, silicon has emerged as a promising alternative anode material due to its much higher theoretical capacity (4200 mAh/g). However, silicon anodes still face drawbacks such as high volume expansion and low electrical conductivity. To address these issues, silicon-carbon combinations in the form of SiOx/C have been developed. SiOx helps maintain the materials structural integrity during volume expansion, while carbon enhances electrical conductivity, prevents aggregation, and restrains volume expansion in silicon. Moreover, SiOx/C can be synthesized using biomass such as plants, as they can serve as a source of both silicon and carbon simultaneously.
In this study, SiOx/C material was synthesized from Eleusine indica biomass or goosegrass, which theoretically contains Si with a concentration exceeding 40 mg/kg. The synthesis was carried out using ZnCl2 as an activator and one-step pyrolysis, resulting in SiOx/C material with a high carbon content (94.04%), an O/Si atomic ratio of 1.72, and micro-sized particles with non-uniform porous morphology. Cycle testing at 200 mA/g showed that the SiOx/C anode exhibited a specific capacity of 614.98 mAh/g with 88.11% retention at the 300th cycle and could maintain 51.34% of its capacity at high current density (1000 mA/g). The high-carbon, porous structure of the synthesized SiOx/C anode synergistically contributed to superior battery performance and stability. |
|---|