Akademik Veri Yönetim Sistemi
MATERIALS RESEARCH EXPRESS, cilt.12, sa.11, 2025 (SCI-Expanded, Scopus)
This study introduces a sustainable anode material for lithium-ion batteries (LIBs) by integrating boron-phosphorus co-doped graphitic carbon nitride (BPCN) into a polyacrylonitrile-lignin (PAN-Lignin) matrix. The composite leverages lignin's renewable nature and BPCN's heteroatom-rich structure to address critical challenges in conventional LIB anodes, such as reliance on fossil-derived materials and limited electrochemical performance. Centrifugal spinning and controlled carbonization (800 degrees C under argon) yielded hierarchically porous PAN-Lignin/BPCN fibers with expanded interlayer spacing (0.34-0.38 nm), as confirmed by XRD and FTIR. The optimized 75:25 PAN-Lignin/BPCN composite demonstrated exceptional lithium-ion storage, achieving an initial discharge capacity of 522.46 mAh g(-1) at 0.5 A/g, 1.4x higher than undoped PAN-Lignin anodes-and retained 72.3% capacity (178 mAh g(-1)) over 50 cycles. Electrochemical analysis revealed synergistic effects: BPCN enhanced electronic conductivity via polarized B-N/P-N bonds, while the lignin-derived carbon framework provided interconnected porosity for efficient ion diffusion. EIS showed low initial interfacial resistance (7.319 Omega) and charge transfer resistance (303 Omega), though post-cycling R-ct increased to 710 Omega due to SEI formation. The composite outperformed single-doped analogs (BCN: 467 mAh g(-1); PCN: 498 mAh g(-1)) and conventional lignin-based carbons, attributed to BPCN's dual role in stabilizing the SEI layer and introducing active sites. Sustainability was emphasized through lignin's carbon-negative sourcing and a 200 degrees C reduction in carbonization temperature compared to graphite anodes. This work advances sustainable LIB technology by replacing >75% fossil-based components with biomass-derived materials while achieving performance metrics rivaling synthetic graphite. The 75:25 PAN-Lignin/BPCN composite sets a benchmark for biomass anodes, aligning with global decarbonization goals. Future efforts should focus on SEI stabilization and full-cell integration to bridge the gap between lab-scale innovation and commercial energy storage systems.