POS6-1266
Optimizing the Lignin/Polypyrrole Ratio for Enhanced Electrochemical Performance of Recycled Silicon-based Si-C Composite Anodes
When and Where
Nov 30, -0001
00:00 - 00:00
Room 301 (Grand Ballroom)
Presenter(s)
Yeongbin Kim (Hongik University)
Co-Author(s)
Abstract
Recycled silicon recovered from end-of-life photovoltaic panels has emerged as a promising, sustainable anode material for lithium-ion batteries owing to its low cost, environmental benefits, and high theoretical capacity. However, its practical application is hindered by severe volume expansion during repeated lithiation and delithiation cycles, which induces unstable solid electrolyte interphase (SEI) formation, structural degradation, and poor cycling stability. Therefore, effective strategies to improve the structural stability and electrochemical performance of recycled silicon are highly desired.
In this study, Si/lignin/polypyrrole (PPy) composite anodes were fabricated using recycled silicon extracted from waste photovoltaic panels. Lignin, a renewable biomass-derived polymer, was employed as a carbon precursor to alleviate the volume expansion of silicon and preserve the structural integrity of the electrode. Concurrently, conductive PPy was introduced to enhance electrical conductivity and establish efficient electron transport pathways within the composite matrix.
To optimize the polymer matrix, composite anodes with various Si/lignin/PPy ratios were prepared. Their structural and electrochemical properties were systematically investigated to evaluate the influence of the composition ratio on overall performance. This study provides fundamental insights into the design of polymer-engineered recycled silicon anodes, offering an environmentally friendly and cost-effective strategy for upcycling photovoltaic waste into high-performance lithium-ion battery materials.
In this study, Si/lignin/polypyrrole (PPy) composite anodes were fabricated using recycled silicon extracted from waste photovoltaic panels. Lignin, a renewable biomass-derived polymer, was employed as a carbon precursor to alleviate the volume expansion of silicon and preserve the structural integrity of the electrode. Concurrently, conductive PPy was introduced to enhance electrical conductivity and establish efficient electron transport pathways within the composite matrix.
To optimize the polymer matrix, composite anodes with various Si/lignin/PPy ratios were prepared. Their structural and electrochemical properties were systematically investigated to evaluate the influence of the composition ratio on overall performance. This study provides fundamental insights into the design of polymer-engineered recycled silicon anodes, offering an environmentally friendly and cost-effective strategy for upcycling photovoltaic waste into high-performance lithium-ion battery materials.
